Season opened

JiiPee63 · 1 Season opened - some questions Sun Apr 09, 2023 6:09 am

JiiPee63

Silver member

Number of posts : 67

Hi there,

The opening of the riding season is done today. Maintenance and some improvements were made during the off-season: rear drive seals were renewed, steering bearings were tightened, front tire was renewed and heated grips were installed. A lower engine cover with brackets are being painted at the moment. There are no leaks or strange noises anymore. The bike starts finally to look like the original 80's bike and is ready for a hard ride.

Before I do wish you Happy Easter, I do have couple of questions:

1)     Alternator: On idle it generates somewhat 11.5-11.7 volts. While driving 13.1 – 13.3 volts. Is this normal or should I be worried about it?
2)     Originality of the bike: If you look at my bike (picture), is it normal to have 2-part front fender on a 1986-model and round-end muffler?
3)     Windshield: What kind of windshield/extension you would recommend? I am 6,13 foot tall, so wind will grab my helmet strongly with original fairing.

Cheers JP

duck · 2 Re: Season opened - some questions Sun Apr 09, 2023 6:33 am

duck

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Number of posts : 4461

Factory exhaust has a long heat shield on it and is rectangular at the back. Yours is aftermarket, maybe Black Hole brand.

Season opened - some questions S-l1600

duck · 3 Re: Season opened - some questions Sun Apr 09, 2023 6:45 am

duck

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Number of posts : 4461

I don't think the two piece fender came out until later. Look under the fork plastic caps to see what forks you have. If you have the S forks but no S stamped in the top then those are the earlier pre-S forks.

Season opened - some questions 3AWmjU2

Point-Seven-five · 4 Re: Season opened - some questions Sun Apr 09, 2023 8:23 am

Point-Seven-five

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Number of posts : 4219

The exhaust looks like the exhaust on my 1991 K100RS. I know they are interchangeable because I put an early exhaust system on my 1992 K100RS when the pipes were cracking. Rode it with that exhaust for 3 years.

duck · 5 Re: Season opened - some questions Sun Apr 09, 2023 8:51 am

duck

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Number of posts : 4461

Typically at higher RPMs the voltage regulator kicks in at about 14-14.2 volts. 13.1 will probably keep your battery charged but you may need to replace the brushes or the voltage regulator.

MartinW · 6 Re: Season opened - some questions Sun Apr 09, 2023 9:25 am

MartinW

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Number of posts : 3014

The brushes and regulator are a one piece unit.
Regards Martin.

JiiPee63 · 7 Re: Season opened - some questions Sun Apr 09, 2023 9:47 pm

JiiPee63

Silver member

Number of posts : 67

Thank you all for the comments,

Duck and Martin W:
* Maybe it is better to order a brand new voltage regulator right away. Not to play with the old one anymore. This way I can make sure that there will be no problems due to the regulator later.

Point-Seven-Five:
* The current exhaust pipe is taken from one spare motorcycle (2V). Maybe it was not there original either. According to OEM spare part catalog, this round end pipe seems to be an alternative, but I have no idea which year model it belongs to - might be for 16v engine. Anyway, I am happy with it and it is working well although installation was not quite P&P. Somehow I just don't like the square end muffler.

Duck:
* Forks upper part looks the same than in the left picture (Sport), but there are no "S" marking. That made me think that forks are taken from a newer bike.

Any idea for the extended (taller) windshield/-screen for rs-model?

Point-Seven-five · 8 Re: Season opened - some questions Sun Apr 09, 2023 11:17 pm

Point-Seven-five

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Number of posts : 4219

Just to help you identify your exhaust, here is a photo. Notice the hose clamps around the headers, they are there to prevent the welds breaking at the collector by damping vibrations. I would suggest putting them on your exhaust.

JiiPee63 · 9 Re: Season opened - some questions Mon Apr 10, 2023 12:31 am

JiiPee63

Silver member

Number of posts : 67

Exactly that one. Although my bracket is selfmade to fit the pipe in my bike. Need to pay attention to those hose clamps. Valuable information, thanks.

Last edited by JiiPee63 on Mon Apr 24, 2023 4:40 am; edited 1 time in total

duck · 10 Re: Season opened - some questions Mon Apr 10, 2023 1:32 am

duck

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Number of posts : 4461

JiiPee63 wrote:Exactly that one. Although my bracket is selfmade to fit in my bike. Need to pay attention to those hose clamps. Valuable information, thanks.

Check to see if your exhaust has that big square part that goes under the transmission to see if it a K100RS4V exhaust.

Season opened - some questions T1qv7ye

I can't imagine why anyone would want to put one of those on an earlier 2V K100. It's a horrible exhaust because it weighs a ton, makes maintenance more difficult and the tendency for the header-collector welds to crack.

duck · 11 Re: Season opened - some questions Mon Apr 10, 2023 1:44 am

duck

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Number of posts : 4461

Windscreen:

I've tried the laminar Lip and it doesn't do much better than the OEM deflector bar. (I'm 6' 2") I do not recommend it.
https://www.laminarlip.com/k100rs.php
Season opened - some questions K100rs

The Aeroflow would probably work but it is costly and, due to the size, would probably cost a lot to ship to Europe.
https://aeroflowscreens.com/product/k11rs-k1rs-af/
Season opened - some questions IK100RS

You might want to take a look at the Parabellum that comes in various heights.
https://parabellum.com/products/bmw-sport-touring-windshield-k100rs-k1100rs
Season opened - some questions SYK100RS

That's all USA product. Maybe there are other options available in Europe.

duck · 12 Re: Season opened - some questions Mon Apr 10, 2023 1:54 am

duck

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Number of posts : 4461

Secdem (France)

https://www.secdem.fr/en/catalogue-produit.php?reference=BB036GT

Season opened - some questions BB036GT

duck · 13 Re: Season opened - some questions Mon Apr 10, 2023 1:58 am

duck

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Number of posts : 4461

Another Secdem
https://www.secdem.fr/en/catalogue-produit.php?reference=BB012HP

Season opened - some questions BB012HP

JiiPee63 · 14 Re: Season opened - some questions Mon Apr 10, 2023 2:26 am

JiiPee63

Silver member

Number of posts : 67

duck wrote:

JiiPee63 wrote:Exactly that one. Although my bracket is selfmade to fit in my bike. Need to pay attention to those hose clamps. Valuable information, thanks.

Check to see if your exhaust has that big square part that goes under the transmission to see if it a K100RS4V exhaust.

I can't imagine why anyone would want to put one of those on an earlier 2V K100. It's a horrible exhaust because it weighs a ton, makes maintenance more difficult and the tendency for the header-collector welds to crack.

Yes, I do have that square part in exhaust pipe. Heeeh, can you imagine that if you get one for 50€ and it is in mint condition? That's why I do have it cheers

. It was a lot easier to get than original pipe at that time.

JiiPee63 · 15 Re: Season opened - some questions Mon Apr 10, 2023 2:39 am

JiiPee63

Silver member

Number of posts : 67

duck wrote:Another Secdem
https://www.secdem.fr/en/catalogue-produit.php?reference=BB012HP

Thanks, this looks a design I like. Not so much drilling holes. Is here anyone who has experience of it? Anyway, it is taller than original - promising design.

zaubertuba · 16 Re: Season opened - some questions Tue Apr 11, 2023 5:40 am

zaubertuba

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Number of posts : 137

Gorgeous job on the resto.--looks really clean! Very Happy

I have a Parabellum fairing and love it. But I understand overseas shipping might be pricey. I always liked the look of the French Secdem products--and if Irc you can get them in different tints, too!

Point-Seven-five · 17 Re: Season opened - some questions Tue Apr 11, 2023 6:41 am

Point-Seven-five

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Number of posts : 4219

JiiPee63 wrote:

duck wrote:

JiiPee63 wrote:Exactly that one. Although my bracket is selfmade to fit in my bike. Need to pay attention to those hose clamps. Valuable information, thanks.

Check to see if your exhaust has that big square part that goes under the transmission to see if it a K100RS4V exhaust.

I can't imagine why anyone would want to put one of those on an earlier 2V K100. It's a horrible exhaust because it weighs a ton, makes maintenance more difficult and the tendency for the header-collector welds to crack.

Yes, I do have that square part in exhaust pipe. Heeeh, can you imagine that if you get one for 50€ and it is in mint condition? That's why I do have it . It was a lot easier to get than original pipe at that time.

I'm thinking that exhaust will flow just a tad better than the earlier version. Whether that gets more hp is debatable, but I can't see where it will hurt.

JiiPee63 · 18 Re: Season opened - some questions Wed Apr 12, 2023 1:58 am

JiiPee63

Silver member

Number of posts : 67

Thanks zaubertuba,

There seems to couple of options, but which one is right to me? Secdem does look pretty good considering the price. I am just wondering the correct hight of the plexiglass.

Regarding orders from USA (or outside EU in general), that will be quite expensive. I ordered a small letter-sized package from the east coast. Let's' say that value of goods were +20 euros, shipping made 35 euros more = 55 euros. Then here I did the customs clearance online and paid the VAT (24%). Total cost 65 euros including small handling fee.

If your order is more than 150 euros (incl. shipping), then you need to pay customs as well (and VAT of course). For motorbike parts custom seems to be 3.7% of the value. This gives you some perspective.

RS Rider · 19 Re: Season opened - some questions Wed Apr 12, 2023 2:46 am

RS Rider

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Number of posts : 237

I had a Laminar Lip on my 1985 K100RS. I'm 6' and have C bars. It made an insignificant difference-a waste of my money essentially. I can't offer an opinion on what it would be like for a shorter rider with RS bars.

I had a very generous individual in Idaho offer me his standard size Aeroflow for just the cost of shipping as he never used it. I ended up paying a fraction of what would have been $400 USD with shipping. I was fortunate. It does everything I want it to do-no turbulence, no bugs. It's attached with 3M Dual Locks, so no drilling. I've had my bike north of 100mph many, many times. It hasn't budged at all.

Last edited by RS Rider on Wed Apr 12, 2023 3:30 pm; edited 1 time in total

duck · 20 Re: Season opened - some questions Wed Apr 12, 2023 2:49 am

duck

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Number of posts : 4461

Here's and adjustable RS wiondscreen from Germany
https://www.mv-motorrad.de/en/MV+Windscreen+adjustable+incl+Grip+Bar+12+mm+for+BMW+K100RS.htm

Season opened - some questions 906733-1

Season opened - some questions 1167837716-2896

duck · 21 Re: Season opened - some questions Wed Apr 12, 2023 3:11 am

duck

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Number of posts : 4461

https://www.motobins.co.uk has the Secdem screen (clear-46cm) for a lot less.

You can't do direct links on their site so you have to navigate to it:
K100RS > Fairings & Screens > Screens

JiiPee63 · 22 Re: Season opened - some questions Wed Apr 12, 2023 3:57 am

JiiPee63

Silver member

Number of posts : 67

Duck and RS Rider,

Thanks for the different options Very Happy

. This german made adjustable windshield could be a good one, but a bit ugly. Maybe not my choice. I compared prices of the SecDem model from Motobins and SecDem. Total price with shipping are following to Finland: Motobins 175 euros (because you need to add VAT 24%, not customs) and SecDem 165 euros (this is VAT included). They are almost the same price. Need to seriously think about it. First I need to get the engine spoiler back from the paint shop. No idea yet, what it will cost.

Anyway, I managed to find voltage regulator for the alternator according to OEM part number. Hitachi -labeled for +10 euros. Let's see if this works better than old Bosch. I could not find any Bosch regulator for convenient price.

Cheers JP

92KK 84WW Olaf · 23 Re: Season opened - some questions Thu Apr 13, 2023 2:55 am

92KK 84WW Olaf

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Number of posts : 7963

JiiPee63 wrote:Duck and RS Rider,

Thanks for the different options . This german made adjustable windshield could be a good one, but a bit ugly. Maybe not my choice. I compared prices of the SecDem model from Motobins and SecDem. Total price with shipping are following to Finland: Motobins 175 euros (because you need to add VAT 24%, not customs) and SecDem 165 euros (this is VAT included). They are almost the same price. Need to seriously think about it. First I need to get the engine spoiler back from the paint shop. No idea yet, what it will cost.

Anyway, I managed to find voltage regulator for the alternator according to OEM part number. Hitachi -labeled for +10 euros. Let's see if this works better than old Bosch. I could not find any Bosch regulator for convenient price.

Cheers JP

Tills.de is good for parts but you got a good price on it.

JiiPee63 · 24 Re: Season opened - some questions Mon Apr 17, 2023 5:49 am

JiiPee63

Silver member

Number of posts : 67

JiiPee63 wrote:Thank you all for the comments,

Duck and Martin W:
* Maybe it is better to order a brand new voltage regulator right away. Not to play with the old one anymore. This way I can make sure that there will be no problems due to the regulator later.

....

Hi,
I finally got the new regulator (Hüco Hitachi) installed in my bike. On a cold engine voltages are around 13.9-14.1V and on a warm engine 13.5 - 14.0V. On idle voltages are above 12V. Absolutely an improvement. Can't understand why Bosch-branded OEM regulator has such an eye-watering price tag.

I got the belly pan (engine spoiler) back from the paint shop. The shade of red is the same although the picture tells a different story. To me, it looks great. Now I do have more time to focus on the windshield issue.

Many thanks for the valuable tips and information. Very Happy

- JP

bad boy · 25 Re: Season opened - some questions Mon Apr 17, 2023 5:58 am

bad boy

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JP, well done!

kippis Season opened - some questions 502531

duck · 26 Re: Season opened - some questions Mon Apr 17, 2023 6:38 am

duck

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Number of posts : 4461

Good job on the alternator fix. With the higher voltage your heated grips (if you have them) should be slightly warmer.

In case anybody else needs one in the future, what is the part number for the Hitachi voltage regulator?

Last edited by duck on Mon Apr 17, 2023 8:53 am; edited 1 time in total

Point-Seven-five · 27 Re: Season opened - some questions Mon Apr 17, 2023 8:22 am

Point-Seven-five

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Number of posts : 4219

Mmmm... That engine spoiler looks good!

Yes, what is the part number for that regulator?

JiiPee63 · 28 Re: Season opened - some questions Mon Apr 17, 2023 5:34 pm

JiiPee63

Silver member

Number of posts : 67

The voltage regulator I found with an OEM part number (12311 4 59286) on several automotive parts pages. OEM number was listed in the reference number list. To be honest, there were many other brands on the list to choose from. When you pick one from the list without knowing is it compatible or not, you have to rely on the given information. It is like doing business blindfolded.

OEM part number gave me also reference to the original part (1 197 311 001). This was listed 44€ + postage. Also, Bosch 1 197 311 090 was on the list for 86€ + postage. Instead, I found Hitachi (part no 130507) at the local automotive parts store for 10-11€. I thought it was worth trying for that price. Time will tell if this was a good choice.

Dai · 29 Re: Season opened - some questions Mon Apr 17, 2023 10:16 pm

Dai

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Number of posts : 5717

JiiPee63 wrote:Can't understand why Bosch-branded OEM regulator has such an eye-watering price tag.

You just answered your own question.

fishboy316 · 30 Re: Season opened - some questions Tue Apr 18, 2023 12:00 am

fishboy316

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Number of posts : 477

I just paid $19.00 US for one from EME. Hoping it will be here today.

JiiPee63 · 31 Re: Season opened - some questions Mon Apr 24, 2023 4:39 am

JiiPee63

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Number of posts : 67

bad boy wrote:JP, well done!

kippis

Thank you bad boy, and prost Season opened - some questions 292303

JiiPee63 · 32 Re: Season opened - some questions Mon Apr 24, 2023 5:23 am

JiiPee63

Silver member

Number of posts : 67

Hi there,
Finally I got my hands on the Secdem windshield. There is at least one motosport dealer in Finland who had this shield on their self. Price wise about the same than from Secdem online store, but I got it in 3 days. First feelings after the test drive on a motorway show that at low speeds (up tp 60-70km/h) the shield reduces wind noise in the helmet remarkably. But faster you drive, the less the shield is useful - noise wise. Here are couple of pictures to show how it fits on the upper fairing.Drilling the holes in the fairing produced a couple of sad tears.

RS Rider · 33 Re: Season opened - some questions Mon Apr 24, 2023 5:48 am

RS Rider

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Number of posts : 237

"Sad tears"? Did the Fibron chip around the holes or did the drilling produce cracks?

JiiPee63 · 34 Re: Season opened - some questions Mon Apr 24, 2023 6:00 am

JiiPee63

Silver member

Number of posts : 67

RS Rider wrote:"Sad tears"? Did the Fibron chip around the holes or did the drilling produce cracks?

Not at all, no cracks, no chips. Just a bit sad to destroy beautiful and shiny paint by drilling holes.

Laitch · 35 Re: Season opened - some questions Mon Apr 24, 2023 6:04 am

Laitch

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Number of posts : 3261

RS Rider wrote:"Sad tears"? Did the Fibron chip around the holes or did the drilling produce cracks?

Tears fell probably because the upper fairing was a virgin all those years until JiiPee drilled it—a bittersweet right of passage. Laughing

RS Rider · 36 Re: Season opened - some questions Mon Apr 24, 2023 6:05 am

RS Rider

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Number of posts : 237

JiiPee63 wrote:

RS Rider wrote:"Sad tears"? Did the Fibron chip around the holes or did the drilling produce cracks?

Not at all, no cracks, no chips. Just a bit sad to destroy beautiful and shiny paint by drilling holes.

Got it! In your eyes and not the fairing.

JiiPee63 · 37 Re: Season opened - some questions Mon Apr 24, 2023 6:12 am

JiiPee63

Silver member

Number of posts : 67

Laitch wrote:

RS Rider wrote:"Sad tears"? Did the Fibron chip around the holes or did the drilling produce cracks?

Tears fell probably because the upper fairing was a virgin all those years until JiiPee drilled it—a bittersweet right of passage.

You said it Very Happy

. I could not put my feelings into words. I try to keep the bike as original as possible and therefore visible tuning is not my cup of tea. This time I had to give up my principles. Sacrificed on the altar of ride comfort Laughing

.

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1 Season opened - some questions Sun Apr 09, 2023 6:09 am

JiiPee63

2 Re: Season opened - some questions Sun Apr 09, 2023 6:33 am

duck

3 Re: Season opened - some questions Sun Apr 09, 2023 6:45 am

duck

4 Re: Season opened - some questions Sun Apr 09, 2023 8:23 am

Point-Seven-five

5 Re: Season opened - some questions Sun Apr 09, 2023 8:51 am

duck

6 Re: Season opened - some questions Sun Apr 09, 2023 9:25 am

MartinW

7 Re: Season opened - some questions Sun Apr 09, 2023 9:47 pm

JiiPee63

8 Re: Season opened - some questions Sun Apr 09, 2023 11:17 pm

Point-Seven-five

9 Re: Season opened - some questions Mon Apr 10, 2023 12:31 am

JiiPee63

10 Re: Season opened - some questions Mon Apr 10, 2023 1:32 am

duck

11 Re: Season opened - some questions Mon Apr 10, 2023 1:44 am

duck

12 Re: Season opened - some questions Mon Apr 10, 2023 1:54 am

duck

13 Re: Season opened - some questions Mon Apr 10, 2023 1:58 am

duck

14 Re: Season opened - some questions Mon Apr 10, 2023 2:26 am

JiiPee63

15 Re: Season opened - some questions Mon Apr 10, 2023 2:39 am

JiiPee63

16 Re: Season opened - some questions Tue Apr 11, 2023 5:40 am

zaubertuba

17 Re: Season opened - some questions Tue Apr 11, 2023 6:41 am

Point-Seven-five

18 Re: Season opened - some questions Wed Apr 12, 2023 1:58 am

JiiPee63

19 Re: Season opened - some questions Wed Apr 12, 2023 2:46 am

RS Rider

20 Re: Season opened - some questions Wed Apr 12, 2023 2:49 am

duck

21 Re: Season opened - some questions Wed Apr 12, 2023 3:11 am

duck

22 Re: Season opened - some questions Wed Apr 12, 2023 3:57 am

JiiPee63

23 Re: Season opened - some questions Thu Apr 13, 2023 2:55 am

92KK 84WW Olaf

24 Re: Season opened - some questions Mon Apr 17, 2023 5:49 am

JiiPee63

25 Re: Season opened - some questions Mon Apr 17, 2023 5:58 am

bad boy

26 Re: Season opened - some questions Mon Apr 17, 2023 6:38 am

duck

27 Re: Season opened - some questions Mon Apr 17, 2023 8:22 am

Point-Seven-five

28 Re: Season opened - some questions Mon Apr 17, 2023 5:34 pm

JiiPee63

29 Re: Season opened - some questions Mon Apr 17, 2023 10:16 pm

Dai

30 Re: Season opened - some questions Tue Apr 18, 2023 12:00 am

fishboy316

31 Re: Season opened - some questions Mon Apr 24, 2023 4:39 am

JiiPee63

32 Re: Season opened - some questions Mon Apr 24, 2023 5:23 am

JiiPee63

33 Re: Season opened - some questions Mon Apr 24, 2023 5:48 am

RS Rider

34 Re: Season opened - some questions Mon Apr 24, 2023 6:00 am

JiiPee63

35 Re: Season opened - some questions Mon Apr 24, 2023 6:04 am

Laitch

36 Re: Season opened - some questions Mon Apr 24, 2023 6:05 am

RS Rider

37 Re: Season opened - some questions Mon Apr 24, 2023 6:12 am

JiiPee63

38 Re: Season opened - some questions

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