gs and rt gearboxes

[Deleted account 220427001]

Got a question ive got a standard 2001 1150gs are the gearboxes the same as the rt box ? thinking about replacing my rumbleing box just do a swap etc are the gears the same etc ?

 

[ianboydsnr]

Got a question ive got a standard 2001 1150gs are the gearboxes the same as the rt box ? thinking about replacing my rumbleing box just do a swap etc are the gears the same etc ?

Boxes are the same!

 

[Grizzly]

Hi Sheene,
2001 GS came with an option of a "standard" 6th gear or an "economy" high 6th gear. I think somebody on here has a link to a table which shows the variations. That said, high or low 6th box would still fit the GS. I don't think the the RT had this option?

Gearbox encyclopedia............ http://www.largiader.com/tech/oiltrans/

Cheers..................Grizzly

 

[Deleted account 220427001]

Thankyou grizzly just was not sure gonna buy the g/box and repair the original one on the bike as a spare thanks again just doing a project you see .

 

[Massive Lee]

I don't know about the "economy" 6th gear. On the GSA, it has a shorter 1st and shorter 6th. The GS and RT shall have the same gearings.

 

[Grizzly]

Hi Massive Lee,
The OP had a query on the 2001 GS gearbox and the info I gave was correct - it was also true in that year that if the "normal" (short?) 6th was fitted the RID would display "6" when in 6th gear. If the bike was fitted with the "economy" (overdrive?) 6th then the RID would display "E"(for ECONOMY!) when in 6th gear.
I think in the later years of the 1150GS - when the Adventure was added to the mix - I THINK the RID displayed "6" for 6th gear on all models no matter which box was fitted?
The Adventure, as you say, could have the TWO options - A short 1st OR a high(economy!) 6th - BUT it could NOT have BOTH options in the same box - so the second option for the Adventure - with the high 6th was exactly the same as a standard GS with the economy 6th.
I'm not sure, but I think the later Adventures only came with short 1st and standard 6th?

Cheers........................Grizzly

 

[Deleted account 220427001]

rt boxes had economy 6th gear I think

 

[Massive Lee]

What about posting gear ratios for each box? That shall clear up the confusion. ;-)

1150GSA transmission. Notice the shorter 1st and 6th gears.

1150GS transmision ratios

1150RT transmission ratios. Numbers found have been rounded up but are essentially similar to the 1150 GS transmision ratios. Info was found here : http://www.motorcyclistonline.com/2004/bmw/r/1150_rt/specifications/544/05/transmission.html

Notice that the transmission is identified as having an overdrive 6th gear. Most likely what many people call an economy tranny. As for the "E" vs "6" in the RID, I am not familiar with it as I never rode an RT. BTW It seems the RT-P (police pack) has the same transmission as the Adventure with the lower 1st and 6th.

1 st gear - 2.05
2nd gear - 1.6
3rd gear - 1.27
4th gear - 1.04
5th gear - 0.9
6th gear - 0.7

Now. If somebody could post numbers for that "economy" transmission, that would end the debate. ;-)

Also, I have a 2006 1150GSA SE and it has the shorter 1st and 6th gear. Great gearings BTW except when you ride a long haul and wished for a 7th gear. I am actually back from a 7,500km ride throughout the US to visit Louisiana and Mississippi (did the Blues Trail) and when I was on the highway, I definitely wished I had that taller 6th gear. But when I was doing backroads, the shorter "enduro" 6th gear was superb. I have a few spare trannies and will maybe take a weekend to do a swap during the long winter. BTW That shorter 6th really makes sense on backroads and dirt roads. A month ago, I did 400km of gravel roads, standing on my pegs, cruising on that shorter 6th gear. I couldn't have done it with a regular tranny. 5th gear would have been to short, and 6th... too tall. But as I am retiring the GSA from off-road duty (I also have a 650 Africa Twin for that), I will now use the GSA for mile muching on long hauls. The longer 6th gear makes sense then. ;-) My 1200KRS will stay put under the tarp in the garage's corner... ;-)