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Old 06-09-2014, 10:42 PM   #1
bananaman OP
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R1150GS Final Drive Ratio Change

Today I rode a 2000 1150GS. I liked it but 1st gear was too tall. How easy is it to change to a rear end with more grunt?
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Old 06-09-2014, 11:09 PM   #2
Zoul
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I had an 01 R1150GS and I felt the same way. I remedied that by installing a final drive from an R850R.

You shift a bit more and you lose some top end, but I liked it.
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Old 06-10-2014, 12:42 AM   #3
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I actually shift less, much less, especially on the mountain roads. I do miss the overdrive nature in 6th but have gladly traded it for the roll on power ability in 6th. 1st is great, especially off road and/or two up. Gas mileage kinda sucks but worth it to me.
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Old 06-10-2014, 03:29 AM   #4
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Quote:
Originally Posted by bananaman View Post
Today I rode a 2000 1150GS. I liked it but 1st gear was too tall. How easy is it to change to a rear end with more grunt?
Very easy if you can find a final drive from an 1100GS in good condition.
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Old 06-10-2014, 04:28 AM   #5
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That was precisely the reason that I bought a used 1100GS and not a new 1150GS.
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Old 06-10-2014, 06:47 AM   #6
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So I could swap in the final drive from my wrecked 1100GS...

Thanks.
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Old 06-10-2014, 09:45 AM   #7
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Yes it will bolt right on. Make sure is at least a 33/11 ratio. You can find the ratio stamped on the housing next to the vent. I have a 33/11 on my 01 1150 GS. First gear is much more useful but still a little tall and over drive still feels like overdrive. I have two other FD's that I plan to try out a 34/11 and a 32/10. Considering these are dual sport adventure bikes I don't understand BMW's design logic with regards to many aspects of the bikes usefulness. I feel they failed in many design areas.
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Old 06-10-2014, 11:07 AM   #8
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33/11

I just got a 33/11 (3:1)for my 1150 Adv. with low 1st gear and I will install it later this year. Original is 2.8:1. on the 2004 1150 Adv, it will make it easier to ride off road and loaded.
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Old 06-10-2014, 11:55 AM   #9
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I just got a 33/11 (3:1)for my 1150 Adv. with low 1st gear and I will install it later this year. Original is 2.8:1. on the 2004 1150 Adv, it will make it easier to ride off road and loaded.
I've never ever noticed the difference between the two gearboxes available. And i've ridden both off road and on road. And seeing as the off road riding is such a small percentage of my riding i prefer the higher top geared box.

With a 32 litre tank fitted It saves me 6 for the same mileage compared to the lower top gear box on every fill up.
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Old 06-10-2014, 01:36 PM   #10
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I don't think the 33/11 ratio will cause a loss of fuel economy. At 70mph my engine rpm is 3450. Last road trip I did I got 44mpg. Seems like that is about what most people are reporting for the 1150GS.
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Old 10-05-2014, 08:14 AM   #11
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Question 34/11 3.09 gearset in hand ` move into gs abs housing

02 1150gs was swell w/ my 96's 1100gs final drive 33/11 but just a bit more wanted so I scored a rare 1994 34/11 1100rs final.


the gearset rests in a non abs housing, so need to migrate pinion and crown to a spare abs mud flap bossed gs housing.. probably a job for bruno ...


or how hard is it to position the pinion/crown gear interface.... can't find much on it...
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Old 10-05-2014, 01:40 PM   #12
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Originally Posted by liviob View Post
Yes it will bolt right on. Make sure is at least a 33/11 ratio. You can find the ratio stamped on the housing next to the vent. I have a 33/11 on my 01 1150 GS. First gear is much more useful but still a little tall and over drive still feels like overdrive. I have two other FD's that I plan to try out a 34/11 and a 32/10. Considering these are dual sport adventure bikes I don't understand BMW's design logic with regards to many aspects of the bikes usefulness. I feel they failed in many design areas.
I have a 33/11 as well, Probably the best compromise, I reckon.

Not only is 1st lower for dirt road and nose picken' through the green lanes but it's a lot easier to take off two up and loaded, especially on a hill.
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Old 10-05-2014, 02:17 PM   #13
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Originally Posted by bananaman View Post
Today I rode a 2000 1150GS. I liked it but 1st gear was too tall. How easy is it to change to a rear end with more grunt?
Very easy to do yourself, you just need a FD with higher numerical ratio. Donors can be found here and there... look or post in Flea Market, or try the dealers.

My own 2000 GS has a taller FD, and it made a big difference, especially grunting up steep freeway on-ramps in congested traffic.
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Old 10-05-2014, 03:24 PM   #14
Ken Fritz
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Thumb Best ratio 3:1

I changed my stock 2.82:1 for a 3:1 about 40,000 miles ago and won't go back. Yes, fuel economy is down a bit and it's not quite as fast on the top end, but the acceleration is greater and the 6th gear is actually more friendly now - less downshifting when pulling a big hill and better cruising at anything less than 75mph. I ride two up and loaded most of the time and the extra grunt off the line and slower idle speed is superior to the stock ratio. With a corrected speedometer (swap out the front wheel speedo drive for one from an R1150RT) that now reads exactly what speed I'm travelling, I can see that I can actually use 6th gear at 55mph.

MPG dropped from 46-48 to 40-42, but it's worth the flexibility; accelerate from 2600 rpm in gears 1-5 easily.

I kept the stock FD as a spare, but haven't need it. The change was probably the best thing I did on this bike and it's well farkled.
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Old 10-06-2014, 02:40 AM   #15
stefan1150
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I am also happy with the 33:11 gear ratio for my 1150 gs. It takes off much easier and if you don't use it predominantly on highways i don't see how it can lower the gas mileage. It's not a big difference but you can definitely notice it.

I wouldn't be very confident in swapping gears from one fd to another. Apart from the shim of the crown bearing which should be recalculated anyway when changing the bearing, you have to re-shim the small gear that drives the crown so that they align perfectly.
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