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Old 11-20-2014, 04:42 PM   #1
Hollow Road Rider OP
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Taller 5th gear?

Re: '92 R100GS

Does anybody have a source for a taller 5th gear?

(I know that the Beemer shop is out of stock).
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Old 11-20-2014, 04:53 PM   #2
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Motobins, UK?
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Old 11-20-2014, 05:14 PM   #3
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Quote:
Originally Posted by Hollow Road Rider View Post
Re: '92 R100GS

Does anybody have a source for a taller 5th gear?

(I know that the Beemer shop is out of stock).
Anton Largiader @ Virginia Motorrad hooked me right up and is very helpful .
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Old 11-21-2014, 01:35 AM   #4
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I have the higher fifth gear on my R100GS and quite frankly I could easily live without it. If you do the majority of your riding at high speed on the open road then go for it, but if you do a lot of dirt roads or like to just toodle along back roads and look at the scenery it can be a pain; fourth a bit low and fifth a bit high. The lower first gear is a better option IMO.




.
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Old 11-21-2014, 09:55 AM   #5
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Originally Posted by gsd4me View Post
I have the higher fifth gear on my R100GS and quite frankly I could easily live without it. If you do the majority of your riding at high speed on the open road then go for it, but if you do a lot of dirt roads or like to just toodle along back roads and look at the scenery it can be a pain; fourth a bit low and fifth a bit high. The lower first gear is a better option IMO.




.
I feel just the opposite. When I had the circlip put in my '92 R100GS, I had both the lower 1st and higher 5th installed. The higher 5th is great and I don't even notice the larger jump from 4th. The lower 1st on the other hand is a pain off road. Yes, it's great in situations where you're picking your way along but there's a big jump into 2nd. Many times I feel I'm too fast for 1st but lugging 2nd so I'm constantly shifting back and forth. I wouldn't do the lower 1st given the chance to do it again.

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Old 11-21-2014, 10:55 AM   #6
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Thanks

Thanks for the thoughts, but I still can't find anybody that can sell me one without waiting two to three weeks.
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Old 11-21-2014, 12:28 PM   #7
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Originally Posted by Hollow Road Rider View Post
Thanks for the thoughts, but I still can't find anybody that can sell me one without waiting two to three weeks.
I just checked Motobins and they are out of stock for the post 82 bikes.

The taller fifth is worth the wait imo, if you do enough open road riding, as already mentioned.
The drop in rpm is considerable, it appears to be 350-400 by my tacho.
Standard 4th to 5th is quite close, so the taller fifth doesn't seem like a big step, and the R100 can easily handle it.
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Old 11-21-2014, 12:54 PM   #8
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Originally Posted by Hollow Road Rider View Post
Thanks for the thoughts, but I still can't find anybody that can sell me one without waiting two to three weeks.
That's a pretty normal wait time.....check with Boxerworks-service. Nathan used to stock them and last time I was there he had 3....7063100699
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Old 11-21-2014, 12:56 PM   #9
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I don't have a taller 5th gear but have wanted one. I agree the standard 4th and 5th is close. Should work fine for anyone except the deranged total off roadie types.
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Old 11-21-2014, 12:56 PM   #10
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Try Meyer in Germany.

http://www.meyer-bikes.de/index.php?...t=23221242992z

I plan on doing the 5th gear only, 1st is a little too low for my intended use.

Rich
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Old 11-21-2014, 02:09 PM   #11
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Just remember that close ratio boxes are there for a reason. The taller gears get closer and closer together for a reason. A taller fifth gear isn't too tall for an R100? That all depends on the situation. It would be too tall for many since fourth and fifth are just about right for many. I love my BMW RS close ratio gear set. 1st though 3rd start out taller and are then spaced closer together from there through 3rd gear. 4th and 5th are stock. It's amazes me how much less shifting I do with the RS gear set over the stock setup. Especially in town. The smart way to get a taller fifth gear IMO is to get a taller Final drive.
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Old 11-21-2014, 02:31 PM   #12
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Originally Posted by supershaft View Post
The smart way to get a taller fifth gear IMO is to get a taller Final drive.
Usually. But OP dude has a late GS, for which there's but one FD.
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Old 11-21-2014, 02:36 PM   #13
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Usually. But OP dude has a late GS, for which there's but one FD.
Man it's great to get a response that makes sense!! Thanks Mw!
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Old 11-21-2014, 03:40 PM   #14
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As a matter of interest, the Acewell speedo on my bike tells me that at 100 km/h (62 mph) the engine is doing exactly 3700 rpm.

One good option if people are happy with the standard ratio first gear and still do the knarly stuff
may be the Siebenrock oil proof clutch that can handle about three times the torque of the standard clutch.




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gsd4me screwed with this post 11-21-2014 at 03:59 PM
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Old 11-22-2014, 05:09 AM   #15
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So a 5% lower top saves 185 revs, at 100 km - if you notice that you are probably better spending the money on a decent tune.

My G/S came with a low 1 st/ high 5 th, fitted at the same time as a full rebuild for the grand sum of $2,686.28.

45,000 Km later the box was as good as scrap, bearings turning on the shafts and in their housings, and it was replaced with a Lamontstamfurd "good low mileage" used box , at a cost of $230- shipped to Oz.

Cant say I notice the difference in ratios,/ revs but I did spend a lot of time and a little money getting the 1000 cc G/S running smoothly, and I use my G/S form the sort of riding it was designed for.
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