2 Re: Brake discs Fri Mar 04, 2016 9:32 pm
Chocolate
Life time member
Hello!
Never heard of the company tsuboss
171, Archimidou Str., 19400 Koropi. Greece
Before.
The price is real good, since the the oem and replacement disks for a K Bike are way over payed, compared to normal car or other motorcycle disk.
Would be interesting how they work.
Cheers
Never heard of the company tsuboss
171, Archimidou Str., 19400 Koropi. Greece
Before.
The price is real good, since the the oem and replacement disks for a K Bike are way over payed, compared to normal car or other motorcycle disk.
Would be interesting how they work.
Cheers
__________________________________________________
Only a few activities make me experience my senses in a way motorcycle riding does, it is like swimming in the nude in a river.
K75 BA/1992 ABS, K75 BA/1991 noABS, Ducati, Mobylette M1/1973
3 Re: Brake discs Fri Mar 04, 2016 9:54 pm
Holister
Life time member
Off-road gear
TsuBoss
This forum conversation might be worth reading.
http://www.bikechatforums.com/viewtopic.php?p=1479848
Sounds like TsuBoss make wavey discs however the ebay adv describes those as "standard".
Price certainly looks good. Might be worth messaging the seller to make sure they aren't wavey.
cheers
TsuBoss
This forum conversation might be worth reading.
http://www.bikechatforums.com/viewtopic.php?p=1479848
Sounds like TsuBoss make wavey discs however the ebay adv describes those as "standard".
Price certainly looks good. Might be worth messaging the seller to make sure they aren't wavey.
cheers
__________________________________________________
1989 K100RT VIN 0097367 (naked) 1996 K1100RS VIN 0451808 | Fuel: 95 Octane Engine Oil: Nulon Full Synthetic 15W50 Gear Box Oil: Nulon Synthetic 75W90 |
4 Re: Brake discs Mon Mar 07, 2016 6:33 pm
Snod Blatter
Life time member
The subtitle of the listing says wavy, bit odd. Anyway, are you supposed to attach these to your old disc carriers yourself? K75s are the same as the 8v K100s when it comes to brakes, right?
__________________________________________________
1989 K100RS SE ABS 8v VIN: 0149214
Others: 1.5 x CBX250RS-E, '94 CB250, '95 TRX850, '16 Z250SL, '01 R1100GS
5 Re: Brake discs Mon Mar 07, 2016 8:33 pm
Rick G
admin
I would be inclined to give them a go. The price seems to be an honest price and as Chocolate says we have been paying far too much for consumable parts for a long time.
__________________________________________________
"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
6 Re: Brake discs Mon Mar 07, 2016 11:48 pm
Holister
Life time member
This is the front disc and carrier (riveted) listed on realoem.comSnod Blatter wrote:The subtitle of the listing says wavy, bit odd. Anyway, are you supposed to attach these to your old disc carriers yourself? K75s are the same as the 8v K100s when it comes to brakes, right?
Part 34111457386 was found on the following vehicles:
It's easy to remove the old disc from the carrier and bolt the new one on.
- Remove the disc carriers from the wheel (4 bolts).
- Using a 4" angle grinder with a metal cutting wheel (not a grinding wheel), cut the rivet heads off from the disc side, NOT the carrier side. You don't want to damage the carrier. A grinding wheel will take ages because the rivets are quite hard but a cutting wheel will slice the flat head off quickly I found. Took me about 15 mins per wheel (I got nowhere fast with drilling). Don't worry about damaging the old disc. Carefully knock the rivet out of the carrier with a drift. Support the carrier to prevent damage and warping.
- Use *M6x20mm 304-stainless steel socket head-button head bolts with 304-ss nylock nuts (*you might need to check that size as its off the top of my head and its been a while). Tighten these up incrementally in a cross pattern as you would on an engine head to prevent any warping due to uneven tension. They will need tensioning fairly high. I didn't use lock-tite and mine have been in for 2 years, no problems.
- Clean the disc with brake cleaner before fitting.
Re bolts: 304 SS (A2-70) is reasonably high tensile corrosion resistant stainless steel. A4 bolts are slightly higher tensile and more corrosion resistant. Some say you should use titanium. I think that's over kill. Your local bolt shop should be able to find something more than suitable.
My bolts came with the discs and I think they were 304 (A2).
Careful using an angle grinder if you're not used to them. Use protective gear and gloves. Make sure the guard is fitted.
Story... A good friend of mine works with a trauma surgeon at a major hospital here. A couple of weeks ago a guy was admitted to their A&E with an angle grinder lodged in his neck . They got it out ok and the guy recovered... just lucky I guess.
__________________________________________________
1989 K100RT VIN 0097367 (naked) 1996 K1100RS VIN 0451808 | Fuel: 95 Octane Engine Oil: Nulon Full Synthetic 15W50 Gear Box Oil: Nulon Synthetic 75W90 |
7 Re: Brake discs Tue Mar 08, 2016 8:30 am
TacKler
Life time member
Careful using an angle grinder if you're not used to them. Use protective gear and gloves. Make sure the guard is fitted.
Story... A good friend of mine works with a trauma surgeon at a major hospital here. A couple of weeks ago a guy was admitted to their A&E with an angle grinder lodged in his neck . They got it out ok and the guy recovered... just lucky I guess.
A common reason people end up in A&E with pieces of angle grinder sticking out of their body is because they remove the guard to put on a larger sized disc. One that is above the design parameters of the grinder.
Some cynics would refer to this as natural selection and eligibility for a Darwin Award.
Story... A good friend of mine works with a trauma surgeon at a major hospital here. A couple of weeks ago a guy was admitted to their A&E with an angle grinder lodged in his neck . They got it out ok and the guy recovered... just lucky I guess.
A common reason people end up in A&E with pieces of angle grinder sticking out of their body is because they remove the guard to put on a larger sized disc. One that is above the design parameters of the grinder.
Some cynics would refer to this as natural selection and eligibility for a Darwin Award.
__________________________________________________
Red 1991 K75S
8 Re: Brake discs Mon Mar 29, 2021 1:06 pm
BooG
Platinum member
I’ve finally undertaken my brake disc changeover as per the directions posted by Holister. I am using A4 grade dome head Allen bolts and my lock nuts.... just wondering what torque I should nip em up to? Any advice welcomed!
9 Re: Brake discs Mon Mar 29, 2021 8:03 pm
gorio
Silver member
A2 and A4 SS bolt torque
6mm 8.7N-m dry 7.8N-m Lubricated
or per Fastenal
7.61 Dry 6.52 Lubed
This is the standard recommend torque for these bolts. I would use the lower ones myself.
Hope that is of help
6mm 8.7N-m dry 7.8N-m Lubricated
or per Fastenal
7.61 Dry 6.52 Lubed
This is the standard recommend torque for these bolts. I would use the lower ones myself.
Hope that is of help
__________________________________________________
1992 K100rs 16v
1997 R1100rt
2006 R1200rt
Past lives
Kawasaki Concours
1976 BMW R90s
1975 Ducati 860gt
1992 Honda VFR750
1985 Honda VF750
1982 Kawasaki 750GPZ
1975 Norton 850 Commando
11 Re: Brake discs Sun Apr 04, 2021 6:50 pm
BooG
Platinum member
There it is! So the bolts were a slight pita, but eventually came out with some vigorous persuading with a drift and hammer.
New disc looks the part....hopefully will be noticeable under braking conditions, although to be fair, I don’t use them much...apart from slow riding....so hopefully the “pulsing” will go!
New disc looks the part....hopefully will be noticeable under braking conditions, although to be fair, I don’t use them much...apart from slow riding....so hopefully the “pulsing” will go!
12 Re: Brake discs Sun Apr 04, 2021 10:48 pm
Michael Sydney
Silver member
BooG wrote:I’ve finally undertaken my brake disc changeover as per the directions posted by Holister. I am using A4 grade dome head Allen bolts and my lock nuts.... just wondering what torque I should nip em up to? Any advice welcomed!
Looking good, hope it works well.
Sorry to be casting doubt, but I notice your "locknuts" appear to be "nylock". I wonder if they are correct in this application given that they may get very hot in extended braking.. maybe enough to melt the plastic inserts.
Conventional nuts may torque better with a longer threaded section. Maybe an engineer could give an opinion.
__________________________________________________
Living in the past! K100 '83 and R65 '83.
13 Re: Brake discs Mon Apr 05, 2021 12:37 am
charlie99
VIP
check for runout on the disk carrier , just a heads up
good luck
good luck
__________________________________________________
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 )
14 Re: Brake discs Mon Apr 05, 2021 12:38 am
Point-Seven-five
Life time member
Nylon has a melting point well north of 200C. It's pretty unlikely that the nylon inserts are going to melt and let the discs loosen up.
__________________________________________________
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
15 Re: Brake discs Tue Apr 06, 2021 1:59 pm
BooG
Platinum member
Thanks for the replies. Yes, the runout could be an issue regarding the nylock nuts. I’ll post back when I’ve attempted fitting the disc.
I wonder what my options are if the nuts do interfere with anything.?? I wonder, could I cut the bolts back a bit and ( with the help of my persuading tool, encourage them to behave like rivits ?!?
I wonder what my options are if the nuts do interfere with anything.?? I wonder, could I cut the bolts back a bit and ( with the help of my persuading tool, encourage them to behave like rivits ?!?
16 Re: Brake discs Tue Apr 06, 2021 3:01 pm
Laitch
Life time member
According to the manufacturer U.S.Fasteners, their common locknuts have nylon inserts made from Zytel 101 which has a melting point ≤121ºC; their special order insert's melting point is ≤177ºC.Point-Seven-five wrote:Nylon has a melting point well north of 200C.
__________________________________________________
1995 K75 90,000 miles
17 Re: Brake discs Tue Apr 06, 2021 3:21 pm
gorio
Silver member
You can always source out some top lock nuts. I know they are available in a lower profile as well. They use a small section of distorted threads to lock them in place thus eliminating the nylon insert and having a lower profile.
Might do the trick.
https://www.imperialsupplies.com/item/9157997
Might do the trick.
https://www.imperialsupplies.com/item/9157997
__________________________________________________
1992 K100rs 16v
1997 R1100rt
2006 R1200rt
Past lives
Kawasaki Concours
1976 BMW R90s
1975 Ducati 860gt
1992 Honda VFR750
1985 Honda VF750
1982 Kawasaki 750GPZ
1975 Norton 850 Commando
18 Re: Brake discs Tue Apr 06, 2021 4:24 pm
Dai
Life time member
Mmmm. You really don't want to know this. Really, really, really don't want to know this
If you use button-head allen bolts, you can put them button-head side out. Looks a lot prettier and there's no clearance problems.
Okay I'm going
If you use button-head allen bolts, you can put them button-head side out. Looks a lot prettier and there's no clearance problems.
Okay I'm going
__________________________________________________
1983 K100 naked upgraded to K100LT spec after spending time as an RS and an RT
1987 K100RT
Others...
1978 Moto Guzzi 850-T3, 1979 Moto Guzzi 850-T3 California,1993 Moto Guzzi 1100ie California
2020 Royal Enfield Bullet 500
19 Re: Brake discs Tue Apr 06, 2021 4:38 pm
Point-Seven-five
Life time member
Laitch, I suspect that the U.S. Fastener data sheet inadvertently copied the temperature from the DuPont technical data incorrectly. DuPont lists the Vicat softening temperature as 240C(465F) and the deflection temperature as 200C(390F). Melt temperature is 263C(505F). Nylon/Zytel has a rapid transition from solid to melt. As a result, it doesn't soften and maintains its mechanical properties at elevated temperatures until rapidly changing to a plastic state. I think the U.S. Fastener guy misread the C as an F when they copied the data.
If Zytel melted at 121C(250F), it wouldn't be one of the most used polymers in automotive under hood applications. As a point of reference, the polyethylene used in milk bottles melts at a higher temperature(>300F).
I doubt that the wheel hubs would get hot enough to melt it, and if they did, the larger problem would be rotor warpage.
http://www.engpolymer.co.kr/product/molding_guide/zytel_product_guide_V1.pdf
If Zytel melted at 121C(250F), it wouldn't be one of the most used polymers in automotive under hood applications. As a point of reference, the polyethylene used in milk bottles melts at a higher temperature(>300F).
I doubt that the wheel hubs would get hot enough to melt it, and if they did, the larger problem would be rotor warpage.
http://www.engpolymer.co.kr/product/molding_guide/zytel_product_guide_V1.pdf
__________________________________________________
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
20 Re: Brake discs Wed Apr 07, 2021 6:13 am
BooG
Platinum member
I have to say.... I am humbled by the depth of knowledge and detail around this issue! Tremendously appreciated!
21 Re: Brake discs Wed Apr 07, 2021 7:02 am
JR_K100RS
Life time member
A long while ago I replaced my front discs with an Italian brand called BRAKING , same deal , had to grind the heads off the rivets and tap them out , got a bit physical with a few and bent the carrier , when I fitted them I had pulsing as well , ended up having to replace one of the carriers
John Re
Melbourne Australia
John Re
Melbourne Australia
__________________________________________________
Diamond Grey ( 617 ) 1987 K100RS ( European Delivery ) Original owner
22 Re: Brake discs Mon Apr 12, 2021 5:55 pm
BooG
Platinum member
Have placed the nuts the other way around now, (rotor-side). I’ll post back when I’ve attempted fitting again.
23 Re: Brake discs Tue Apr 13, 2021 5:31 am
Dai
Life time member
__________________________________________________
1983 K100 naked upgraded to K100LT spec after spending time as an RS and an RT
1987 K100RT
Others...
1978 Moto Guzzi 850-T3, 1979 Moto Guzzi 850-T3 California,1993 Moto Guzzi 1100ie California
2020 Royal Enfield Bullet 500
24 Re: Brake discs Tue Apr 27, 2021 5:23 pm
BooG
Platinum member
Well....that worked then!
Isn’t it “Occam’s Razor” which states that the simplest explanation is usually the best?
So anyone else doing this: face the dome heads towards the hub, and the nuts facing the exhaust side. Job done!
Haven’t been out for a test run yet but I will shortly so watch this space!
Isn’t it “Occam’s Razor” which states that the simplest explanation is usually the best?
So anyone else doing this: face the dome heads towards the hub, and the nuts facing the exhaust side. Job done!
Haven’t been out for a test run yet but I will shortly so watch this space!
26 Re: Brake discs Thu Aug 04, 2022 9:03 am
gravelsandwich
active member
BooG, How are the Tsuboss discs going? are you happy with them?
27 Re: Brake discs Thu Aug 04, 2022 1:30 pm
BooG
Platinum member
Yeah….seem fine. I think they were a great deal. That said, I don’t tend to use the brakes much. K bikes have excellent engine breaking, so I use that a lot. I do a lot of slow riding in town, so the disc gets dragged frequently, but it seems to be holding up pretty well… I put new pads in as well when I replaced them. The nyloc nuts and bolts are holding fast also. A happy result.
28 Re: Brake discs Thu Aug 04, 2022 5:05 pm
gravelsandwich
active member
Cheers, I'm replacing my discs and saw those Tsuboss on Oz Ebay, there's also 4mm fronts by MTX parts for about $100 each . Good to know there's an option.....
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