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1Back to top Go down   Rattly timing chain Empty Rattly timing chain Sun Jan 17, 2016 8:46 am

Holister

Holister
Life time member
Life time member
I have a lot of noise coming from the front of the motor. Been gradually getting worse over the past 12 months. Noise is not too bad when cold but very rattly when hot. Pretty sure it's the timing chain.  Anyone got any thoughts on this? Is there anything else I need to consider when doing this?

Cheers


__________________________________________________

1989 K100RT     VIN  0097367 (naked)  
1996 K1100RS   VIN  0451808
 Rattly timing chain Austra12    Fuel:  95 Octane
Engine Oil: Nulon Full Synthetic 15W50
Gear Box Oil:  Nulon Synthetic 75W90
    

2Back to top Go down   Rattly timing chain Empty Re: Rattly timing chain Sun Jan 17, 2016 9:52 am

Point-Seven-five

Point-Seven-five
Life time member
Life time member
Could just be a stuck tensioner.  I've been into two of my K's, one with 70k miles and one with 110k.    The k100RS with 110k had a worn chain with a bit of side bend, the 75RT with 70k had a near perfect chain compared to a new one.  Neither bike showed any visible wear to the guides or tensioner. 

If you decide to replace anything I would just do the chain.  The tensioner can be cleaned and checked for a plugged oil passage.  The guides will probably last forever.


__________________________________________________
Present: 1991 K100RS "Moby Brick Too"
 
Past:
1994 K75RT "Ilsa, She Wolf of the SS"
1988 K100RS SE "Special Ed"
1994 K75S "Cheetos"
1992 K100RS "Moby Brick" R.I.P.
1982 Honda FT500
1979 Honda XR185
1977 Honda XL125
1974 Honda XL125
1972 OSSA Pioneer 250
1968 Kawasaki 175
    

3Back to top Go down   Rattly timing chain Empty Re: Rattly timing chain Sun Jan 17, 2016 9:58 am

charlie99

charlie99
VIP
VIP
check the plastic rails

the whole chain kit including rails isn't too exxy  

but worth cleaning up the tensioner whilst in there
 .


__________________________________________________
cheezy grin whilst riding, kinda bloke ....oh the joy !!!! ...... ( brick aviator )

'86 K100 RT..#0090401 ..."Gerty" ( Gertrude Von Clickandshift ) --------O%O
'86 k100 rs.. #######..  "Fred " (f(rame) red ) ( Fredrick leichtundschnell ) - -
bits and pieces from many kind friends across the k100 world ...with many thanks ..
1987 k100rs ########   "Red"  - (red sports rs TWB style )
1989 K100rt #009637   "Black Betty"  (naked rt ala Nigel , now sporting an rs main fairing )
    

4Back to top Go down   Rattly timing chain Empty Re: Rattly timing chain Sun Jan 17, 2016 10:16 am

Crazy Frog

Crazy Frog
admin
admin
According to BMW, the chain/guide should be replaced every 60,000 kms.
Personally, I replace them at 100k.


__________________________________________________
Rattly timing chain Frog15Rattly timing chain Logo2101986 k75, 1985 K100rt, 1985 K100rt/EML GT2 sidecar, 1999 K1200lt/Hannigan Astro Sport sidecar.
    

5Back to top Go down   Rattly timing chain Empty Re: Rattly timing chain Sun Jan 17, 2016 10:48 am

Holister

Holister
Life time member
Life time member
A bit of history. The old girl has done 157k klm. I bought her with 125k on the odo. There were a couple of receipts for work done after 110k but not for the timing chain.


__________________________________________________

1989 K100RT     VIN  0097367 (naked)  
1996 K1100RS   VIN  0451808
 Rattly timing chain Austra12    Fuel:  95 Octane
Engine Oil: Nulon Full Synthetic 15W50
Gear Box Oil:  Nulon Synthetic 75W90
    

6Back to top Go down   Rattly timing chain Empty Re: Rattly timing chain Sun Jan 17, 2016 10:55 am

Rick G

Rick G
admin
admin
The chain usually outlasts the guides and tensioner. have a look is about the only way to check. If you need any bits I have heaps of those here just give me a yell and I'll post them down.


__________________________________________________
"Man sacrifices his health in order to make money.
Then he sacrifices money to recuperate his health.
And then he is so anxious about the future that he does not enjoy the present; the result being that he does not live in the present or the future; he lives as if he is never going to die, and then dies having never really lived."   Dalai Lama


Bikes 1999 K1100 LT with a Big Block 1200
    

7Back to top Go down   Rattly timing chain Empty Re: Rattly timing chain Sun Jan 17, 2016 11:20 am

Holister

Holister
Life time member
Life time member
I'll just order a chain then. Thanks Rick.
Hope to get this done before the Snowy trip.

What'sthe best stuff to use for a gasket? Permatex Ultra??


__________________________________________________

1989 K100RT     VIN  0097367 (naked)  
1996 K1100RS   VIN  0451808
 Rattly timing chain Austra12    Fuel:  95 Octane
Engine Oil: Nulon Full Synthetic 15W50
Gear Box Oil:  Nulon Synthetic 75W90
    

8Back to top Go down   Rattly timing chain Empty Re: Rattly timing chain Sun Jan 17, 2016 2:52 pm

Two Wheels Better

Two Wheels Better
Moderator
Moderator
At just over 120K (kms) my K100RS' plastic guides had grooves in 'em, all three. I replaced the tensioner as well since I already had a spare. Aside from a debacle where 'Bins sent the wrong length chain in the correct box, it's a pleasant afternoon job in the garage. Charlie saved me by offering up his spare and I replaced his when they sent the correct chain. Be sure to have a front seal and the method/tool to easily do the job. I prefer OEM Drei Bond (or Yama bond/Honda bond/Fuji bond) but any good anaerobic sealant works - stays flexible in the absence of air.


__________________________________________________
"A long ride is the answer to a question you will soon forget!" ~ Anonymous
1977 R75/7-100, '93 K11/K12 Big Block, '93 K1100RS, '95 R100 Mystic, '96 K1100RS, 2 x '98 K1200RS, '06 K1200R & '09 K1300GT
    

9Back to top Go down   Rattly timing chain Empty Re: Rattly timing chain Sun Jan 17, 2016 8:04 pm

Rick G

Rick G
admin
admin
I use permatex RTV blue. Be aware the parcel delivery is slow now as the international flights are chockers with people so not much freight space. I'm still waiting for fork seals that were sent over 2 weeks ago.


__________________________________________________
"Man sacrifices his health in order to make money.
Then he sacrifices money to recuperate his health.
And then he is so anxious about the future that he does not enjoy the present; the result being that he does not live in the present or the future; he lives as if he is never going to die, and then dies having never really lived."   Dalai Lama


Bikes 1999 K1100 LT with a Big Block 1200
    

10Back to top Go down   Rattly timing chain Empty Re: Rattly timing chain Mon Jan 18, 2016 12:04 pm

Point-Seven-five

Point-Seven-five
Life time member
Life time member
+1 on the Permatex RTV blue.


__________________________________________________
Present: 1991 K100RS "Moby Brick Too"
 
Past:
1994 K75RT "Ilsa, She Wolf of the SS"
1988 K100RS SE "Special Ed"
1994 K75S "Cheetos"
1992 K100RS "Moby Brick" R.I.P.
1982 Honda FT500
1979 Honda XR185
1977 Honda XL125
1974 Honda XL125
1972 OSSA Pioneer 250
1968 Kawasaki 175
    

11Back to top Go down   Rattly timing chain Empty Re: Rattly timing chain Wed Feb 10, 2016 9:22 am

Holister

Holister
Life time member
Life time member
The timing chain kit from Motorworks arrived last week. So that I had a before and after comparison I recorded the motor running at idle. It's at running temperature with the fan cutting in and out as normal. You can definitely hear the noisy chain at the front left corner of the block.


One of the timing cover bolts (6M 20mm) stripped inside the head as I was taking it out. A couple of different ezy-outs failed to remove it so I sacrificed one of Tom's allen keys and welded it to the bolt head....snap!

Apart from an extra 2 or 3 mm, the timing chain looked pretty good. No more bendy than the new one. However the guides were worn especially the shorter side guide rail which had deep grooves (I'll post a pic tomorrow). The tensioner mechanism looks to be working fine. Oil holes were unblocked. Everything went back together without a hitch.

Unfortunately one of the valve cover bolt holes stripped. Picking up a helicoil compatible NuCoil kit in the morning.

Replaced the cover bolt rubber seals while I was at it.

Should be BOTR by lunchtime tomorrow.

Thanks to Tom for allowing me to use his workshop and for his help and ingenuity.


__________________________________________________

1989 K100RT     VIN  0097367 (naked)  
1996 K1100RS   VIN  0451808
 Rattly timing chain Austra12    Fuel:  95 Octane
Engine Oil: Nulon Full Synthetic 15W50
Gear Box Oil:  Nulon Synthetic 75W90
    

12Back to top Go down   Rattly timing chain Empty Re: Rattly timing chain Thu Feb 11, 2016 8:00 am

Holister

Holister
Life time member
Life time member
New timing chain and guides has made a big difference to the engine noise. The old girl is purring nicely now with a noticeable increase in engine performance. Better acceleration and quicker throttle responce. I'm expecting a big improvement in fuel consumption.
The guides were very worn.
Rattly timing chain 20160215
Rattly timing chain 20160217

Helicoil went in but unfortunately after the offending hole was cleaned out after tapping a thread for the coil I found the surrounding metal had cracked. Coil went in anyway and the cover bolt torqued up ok BUT I think the bushing block taking the bolt hole will need to be repaired or replaced. Anyone got any ideas on this.
Anyone have an old motor with a spare camshaft bushing block thingy I can buy?
Cheers
Rattly timing chain 20160214


__________________________________________________

1989 K100RT     VIN  0097367 (naked)  
1996 K1100RS   VIN  0451808
 Rattly timing chain Austra12    Fuel:  95 Octane
Engine Oil: Nulon Full Synthetic 15W50
Gear Box Oil:  Nulon Synthetic 75W90
    

13Back to top Go down   Rattly timing chain Empty Re: Rattly timing chain Thu Feb 11, 2016 8:05 am

charlie99

charlie99
VIP
VIP
yeah have a couple here mate

but remember they are tunnel bored and as such might have some offset to the camshaft journals

I think sidecar paul posted a fix for this involving a new piece of aluminium across the bridge of the affected piece ...was a neat solution indeed


__________________________________________________
cheezy grin whilst riding, kinda bloke ....oh the joy !!!! ...... ( brick aviator )

'86 K100 RT..#0090401 ..."Gerty" ( Gertrude Von Clickandshift ) --------O%O
'86 k100 rs.. #######..  "Fred " (f(rame) red ) ( Fredrick leichtundschnell ) - -
bits and pieces from many kind friends across the k100 world ...with many thanks ..
1987 k100rs ########   "Red"  - (red sports rs TWB style )
1989 K100rt #009637   "Black Betty"  (naked rt ala Nigel , now sporting an rs main fairing )
    

14Back to top Go down   Rattly timing chain Empty Re: Rattly timing chain Thu Feb 11, 2016 12:59 pm

sidecar paul

sidecar paul
Life time member
Life time member
Yes Charlie it was me. I made two for forum members in America so if you need one Nigel, give me a shout.

Rattly timing chain Sam_0510
Rattly timing chain Sam_0511

In the meantime, I'd put a small hose clamp on the stub to prevent it spreading.

Paul.


__________________________________________________
'84 K100RS (0014643) (owned since '85), 86 K100RS (0018891) with Martello sidecar (built as an outfit in '88),
'51 Vincent (since '67),'72 Montesa Cota (from new), '87 Honda RS125R NF4 (bought 2015) 
....No CARS never ever!
    

15Back to top Go down   Rattly timing chain Empty Re: Rattly timing chain Thu Feb 11, 2016 7:58 pm

Point-Seven-five

Point-Seven-five
Life time member
Life time member
Could you make a bar of aluminum with two holes for the mounting studs, and the center hole a press fit over the cracked part?  That would be the simple fix to me as long as the helicoil is doing it's job.


__________________________________________________
Present: 1991 K100RS "Moby Brick Too"
 
Past:
1994 K75RT "Ilsa, She Wolf of the SS"
1988 K100RS SE "Special Ed"
1994 K75S "Cheetos"
1992 K100RS "Moby Brick" R.I.P.
1982 Honda FT500
1979 Honda XR185
1977 Honda XL125
1974 Honda XL125
1972 OSSA Pioneer 250
1968 Kawasaki 175
    

16Back to top Go down   Rattly timing chain Empty Re: Rattly timing chain Thu Feb 11, 2016 10:35 pm

rawdonball

rawdonball
Gold member
Gold member
An informative thread thank you Kaptain and contributors...

Please keep us posted on your fuel consumption findings. I found your observations regarding significant gains when setting valve stem clearances particularly interesting. Do you think the improvements were due only to better valve timing (the percentage increase in flow losses due to too big a clearance must surely be minimal?) or did you - I hate even to say it - have cylinder pressure losses due to incomplete sealing of the valves (i.e too small a clearance)? I know that if you had this latter case for any length of time then adjusting the clearances would not have brought you back to the consumption figures you were quoting. I feel I might be getting myself into deep water here - please don't take this the wrong way!


__________________________________________________
'88 K100RT, '86 K75C, '05 Yamaha TTR250
    

17Back to top Go down   Rattly timing chain Empty Re: Rattly timing chain Fri Feb 12, 2016 8:00 am

Holister

Holister
Life time member
Life time member
Point-Seven-five wrote:Could you make a bar of aluminum with two holes for the mounting studs, and the center hole a press fit over the cracked part?  That would be the simple fix to me as long as the helicoil is doing it's job.
That sounds like a neat idea. I'll investigate.
Also got a guy looking at the possibility of welding it up but that may be a problem if the piece warps due to the heat.
Paul, thanks for the offer of fabricating a bridge, I'll let you know.

Of course I'd have to say that there must've been a problem with the thread previously. I've had the covers of quite a few times but I've always been very easy when tightening those bolts up. However, how the crack appeared has got me wondering. Was it there to begin with, covered over with oil etc or did it appear when tapping out the hole? The guy that sold me the NuCoil kit seemed to know what he was talking about and he suggested I should be able to just tap out the hole as is with out drilling the old threads out. I feel this may have been a mistake as that may have placed greater stress on the surrounding metal. I think if I were to do that again I would drill it out and brace it with a hose clamp re Paul suggestion. The good thing is I can see there's a remedy.

Rawdon. Your reference to valve clearances was probably regarding my post on the recent Fuel consumption thread. The other symptoms I referred to in that post relate to a problem I had back in 2014 with my engine cutting out (Engine cutout on throttle off and solution here). What I found was that the exhaust valve clearances on the front 3 pots were far too tight and undoubtedly got worse once the engine reached operating temp. Most likely the valves were not fully closing as you suggested. I also had a bit of backfiring sounding similar to a rifle going off. What I do know is that once the exhaust valve clearances were brought back into spec, the symptoms of engine failure instantly disappeared and my fuel consumption fell dramatically. There's no "maybe" about that. I keep meticulous fuel and service records so it's well documented.
Rawdonball wrote:I know that if you had this latter case for any length of time then adjusting the clearances would not have brought you back to the consumption figures you were quoting
I'm interested to hear your thoughts. Can you elaborate on this old mate?  Cheers


__________________________________________________

1989 K100RT     VIN  0097367 (naked)  
1996 K1100RS   VIN  0451808
 Rattly timing chain Austra12    Fuel:  95 Octane
Engine Oil: Nulon Full Synthetic 15W50
Gear Box Oil:  Nulon Synthetic 75W90
    

18Back to top Go down   Rattly timing chain Empty Re: Rattly timing chain Fri Feb 12, 2016 10:11 am

Point-Seven-five

Point-Seven-five
Life time member
Life time member
Kaptain, with the bearing cap off, cut a strip of 3mm aluminum and put a press fit hole in the center.  Press it onto the cap and use the holes in the cap as guides for the other two holes in the strip.  I would figure under an hour in a shade tree machine shop and about a buck in material cost.


__________________________________________________
Present: 1991 K100RS "Moby Brick Too"
 
Past:
1994 K75RT "Ilsa, She Wolf of the SS"
1988 K100RS SE "Special Ed"
1994 K75S "Cheetos"
1992 K100RS "Moby Brick" R.I.P.
1982 Honda FT500
1979 Honda XR185
1977 Honda XL125
1974 Honda XL125
1972 OSSA Pioneer 250
1968 Kawasaki 175
    

19Back to top Go down   Rattly timing chain Empty Re: Rattly timing chain Sun Feb 14, 2016 2:08 am

Rick G

Rick G
admin
admin
All the dimensions you need Nigel for the replacement cap
Rattly timing chain Cam_bl10


__________________________________________________
"Man sacrifices his health in order to make money.
Then he sacrifices money to recuperate his health.
And then he is so anxious about the future that he does not enjoy the present; the result being that he does not live in the present or the future; he lives as if he is never going to die, and then dies having never really lived."   Dalai Lama


Bikes 1999 K1100 LT with a Big Block 1200
    

20Back to top Go down   Rattly timing chain Empty Re: Rattly timing chain Sun Feb 14, 2016 4:21 am

Holister

Holister
Life time member
Life time member
Thanks Rick. That's a big help. Cheers.


__________________________________________________

1989 K100RT     VIN  0097367 (naked)  
1996 K1100RS   VIN  0451808
 Rattly timing chain Austra12    Fuel:  95 Octane
Engine Oil: Nulon Full Synthetic 15W50
Gear Box Oil:  Nulon Synthetic 75W90
    

21Back to top Go down   Rattly timing chain Empty Re: Rattly timing chain Tue Feb 16, 2016 12:17 am

K75cster

K75cster
Life time member
Life time member
Would there be any advantage in having that bridge hole an interference fit? Perhaps help keep the bridge thread together. If you put the cap in the fridge and the Ali strip in the sun then it will slip over the cap and shrink onto it. Anyone see an issue with that???


__________________________________________________
Keith - 1987 K75c with r100rt replica fairing and half of a 1984 K100rt 1992 K1100LT a blue one

The Clever are adept at extricating themselves from situations that the wise would have avoided from the outset - QUOTE from david Hillel in Out of the Earth.
    

22Back to top Go down   Rattly timing chain Empty Re: Rattly timing chain Tue Feb 16, 2016 3:08 am

charlie99

charlie99
VIP
VIP
yeah I see an issue mate ....

once the metal is gone from the thread hole ...there is no going back, no amount of retapping will achieve the same tensile strength of the original

keep in mind that its a cam cover fixing ...and shouldn't be under too much stress ....but as always we like to go a little too firm with the tighten up process

good thought but naaa    I wouldn't go there


__________________________________________________
cheezy grin whilst riding, kinda bloke ....oh the joy !!!! ...... ( brick aviator )

'86 K100 RT..#0090401 ..."Gerty" ( Gertrude Von Clickandshift ) --------O%O
'86 k100 rs.. #######..  "Fred " (f(rame) red ) ( Fredrick leichtundschnell ) - -
bits and pieces from many kind friends across the k100 world ...with many thanks ..
1987 k100rs ########   "Red"  - (red sports rs TWB style )
1989 K100rt #009637   "Black Betty"  (naked rt ala Nigel , now sporting an rs main fairing )
    

23Back to top Go down   Rattly timing chain Empty Re: Rattly timing chain Tue Feb 16, 2016 9:51 am

rawdonball

rawdonball
Gold member
Gold member
Rawdonball wrote:I know that if you had this latter case for any length of time then adjusting the clearances would not have brought you back to the consumption figures you were quoting
I'm interested to hear your thoughts. Can you elaborate on this old mate?  Cheers

Hey Kaptain, thanks for posting those links to other threads as regards your fuel consumption and valve clearance issues - I thought I had read all your posts!

When I said a problem resulting from valves clearances being too small, was unlikely to be fully rectified by adjustment only if it had been around for a while - this was due to me thinking that exhaust valves that fail to close fully would soon burn/overheat. In this case restoration of good sealing and hence engine performance would need valve and valve seat sealing area reconditioning. The theory (which I've only read about recently) is that a significant proportion of the heat loss from a valve, is via conduction through the valve seat while the valve is closed - if valve isn't closing properly you get overheating as well as the destructive action of burning gas being forced between the sealing surfaces. It would be interesting to see how the cylinder compression readings for those with previously tight valve clearances compare with the cylinder which had the ok valve clearances.

Your expose' on the engine cut out on throttle off was fascinating and has given me my latest 'pet theory' - if it was caused by compression related problems from valve clearances being too small then no wonder it seemed intermittent (and likewise your fuel consumption issue). All down to the fact that the instances in which these problems were noticed were dependent on many factors including the way you had been riding, the ambient temperature conditions, the fuel you were using, the load you were carrying etc etc....

Anyway - while i'm enjoying my theorizing I hope you are enjoying your silent timing chain. How about posting another video clip for 'after the fix' so the rest of us can appreciate the K music?


__________________________________________________
'88 K100RT, '86 K75C, '05 Yamaha TTR250
    

24Back to top Go down   Rattly timing chain Empty Re: Rattly timing chain Tue Feb 16, 2016 7:51 pm

Holister

Holister
Life time member
Life time member
I'll post a video next week. Off to the Snowy Run and then back up North for a few days. Won't be back to end of next week.
Your theory sounds interesting Rawdon. Poorly seating valves might explain a few things possibly, like a slight revving at idle and a tendency to run a little hot. What do you think? That's been bugging me for quite a while and I've not been able to put my finger on it.
Will post fuel consumption figures (with new chain) after this weekend and do a compression test.
Cheers


__________________________________________________

1989 K100RT     VIN  0097367 (naked)  
1996 K1100RS   VIN  0451808
 Rattly timing chain Austra12    Fuel:  95 Octane
Engine Oil: Nulon Full Synthetic 15W50
Gear Box Oil:  Nulon Synthetic 75W90
    

25Back to top Go down   Rattly timing chain Empty Re: Rattly timing chain Tue Feb 16, 2016 7:59 pm

indian036

indian036
Life time member
Life time member
K75cster wrote:Would there be any advantage in having that bridge hole an interference fit? Perhaps help keep the bridge thread together. If you put the cap in the fridge and the Ali strip in the sun then it will slip over the cap and shrink onto it. Anyone see an issue with that???
Another potential issue is the operating temperature of the engine. Depending on the composition of the iron/steel and the aluminium alloy, the aluminium thermal expansion is at least 50% greater than the iron/steel.
At operating temperature, I think the interference wouldn't do too much interfering. 

Bill


__________________________________________________
1985 K100RT  VIN 0028991  My original Very Happy ROB the Red Old Bike   (Historic rego)
1985 K100RT  VIN 0029036  BOB the Blue Old Bike  (Historic rego)
1990 K100LT  VIN 0190452  Work in progress
1984 K100RT  VIN 0023022  Work needing lots of progress

1986 K100RT  VIN 0090542  Work needing lots and lots of progress
1993 K1100LT  VIN 0183046  Work in progress
1993 K75S  VIN 0213045  Tom the Triple (now on Historic rego too.)
    

26Back to top Go down   Rattly timing chain Empty Re: Rattly timing chain Tue Feb 16, 2016 8:20 pm

Point-Seven-five

Point-Seven-five
Life time member
Life time member
I think the cam bearing cap is an aluminum die casting alloy and will have a similar thermal expansion to a strip of aluminum.


__________________________________________________
Present: 1991 K100RS "Moby Brick Too"
 
Past:
1994 K75RT "Ilsa, She Wolf of the SS"
1988 K100RS SE "Special Ed"
1994 K75S "Cheetos"
1992 K100RS "Moby Brick" R.I.P.
1982 Honda FT500
1979 Honda XR185
1977 Honda XL125
1974 Honda XL125
1972 OSSA Pioneer 250
1968 Kawasaki 175
    

27Back to top Go down   Rattly timing chain Empty Re: Rattly timing chain Wed Feb 17, 2016 12:53 am

indian036

indian036
Life time member
Life time member
Point-Seven-five wrote:I think the cam bearing cap is an aluminum die casting alloy and will have a similar thermal expansion to a strip of aluminum.
Brain fade - too used to thinking of all the cast iron engines I've worked on.

Thanks for the correction.

Bill


__________________________________________________
1985 K100RT  VIN 0028991  My original Very Happy ROB the Red Old Bike   (Historic rego)
1985 K100RT  VIN 0029036  BOB the Blue Old Bike  (Historic rego)
1990 K100LT  VIN 0190452  Work in progress
1984 K100RT  VIN 0023022  Work needing lots of progress

1986 K100RT  VIN 0090542  Work needing lots and lots of progress
1993 K1100LT  VIN 0183046  Work in progress
1993 K75S  VIN 0213045  Tom the Triple (now on Historic rego too.)
    

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