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Old 04-01-2013, 07:35 PM   #16
ontic
 
Joined: Jul 2008
Location: Melbourne
Oddometer: 1,067
Quote:
Originally Posted by GapRunr View Post
As for the tach, it's a new digital tach designed for two cylinder dual fire ignitions. I would suspect it is pretty accurate.
Link and details? I'm still shopping for a tach for my G/S.
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Old 04-01-2013, 08:44 PM   #17
GapRunr
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Joined: Oct 2005
Location: East TN / Smokies
Oddometer: 492
Quote:
Originally Posted by ontic View Post
Link and details? I'm still shopping for a tach for my G/S.
Here's a pic installed in a temporary location.



Since I own a shop posting details and price is frowned upon. Check your PM's.
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GapRunr screwed with this post 04-04-2013 at 09:14 AM
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Old 04-02-2013, 05:36 AM   #18
StephenB
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Joined: Aug 2005
Location: Ontario
Oddometer: 2,044
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Originally Posted by Bluethumb View Post
What can I do to lower r.p.m.'s of a ST? At hiway speeds of 70 m.p.h., the engine is spinning about 1,000 more r.p.m.'s then my R100. I know of two ways to change the ratio of the final drive on a G/S - ST. One is with the higher 5th gear and the other is the optional final drive. The higher 5th gear is expensive from what I've read, the cost of the gear plus the time and expense of a rebuild. I thinK I've read it drops r.p.m.'s by 400-500. The optional final drive is NLA I believe, but if it is still available I'm guessing it's unbelievably expensive and I'm not sure how much it drops r.p.m.'s.

Is there another option? Is it possible to use a different FD and re-lace the rear hub to a ST rim?

Any other way to replace the final drive with another to drop engine speeds?
There is a solution that hasn't been mentioned yet: the adaptation of a 88-95 RxxGS rear wheel to a monolever 4-lug FD. That gives you three FD ratios from factory:37:11 (R80RT Mono), 32:10 (R100RT Mono) or 33:11 (R100RS Mono) . Details are here: http://www.stephenbottcher.net/BMW/rearconv.htm

Hope that helps, Stephen
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Old 04-03-2013, 12:04 PM   #19
bajaburro
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Joined: Jan 2006
Location: Huntington Beach CA
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tall 5th

it's the best option for your bike.just lowers the rpm in 5th enough to make freeway riding a bit nicer.
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