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GS Final Drive

  • Thread starter Thread starter Ken Read
  • Start date Start date
K

Ken Read

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Hi all could anybody help i have bought a 1981 GS 850GX in the uk,it is an import from the USA.The speedometer only goes to 85mph is there any difference in the final drive ratios over a UK speck model as the exceleration is good but at 70/80 mph the engine seems to be reving very hard at 5500rpm or do i need to get a uk spec revcounter:confused:
 
That's just the way they run. Don't worry, just ride it. That engine will take a lot more. After 6K RPMs is when the fun begins!

Even you want lower RPMs at the top end you can swap the final drive from some of the 1100s.
 
The differential swap would involve finding a late 82-83 GK one with the 2.90 ratio Not worth the expense. Will change about 300 RPM from what I have heard. My normal freeway RPM is 5500-6K The bike will do that all day without any problems. If you have a 16" rear wheel ? you could go to a 17" wheel for about the same change
 
The 2.90 rear end came in all the '83 - '84 1100G's. I put a 1100GL rear end in my 850 and as Lynn said, it was good for about 300 rpm.
 
what does the 82 1100G have? and if i happened upon the 2.9 one, assuming i don't have the 2.9 one, if i happened to have it, would it be worth it to make the swap?
 
seuadr said:
what does the 82 1100G have? and if i happened upon the 2.9 one, assuming i don't have the 2.9 one, if i happened to have it, would it be worth it to make the swap?
Click to expand...

Define "worth it"?

ShaftDriveGSgearratios.jpg
 
seuadr said:
what does the 82 1100G have? and if i happened upon the 2.9 one, assuming i don't have the 2.9 one, if i happened to have it, would it be worth it to make the swap?
Click to expand...

I don't know about swapping Mr. seuadr, our bikes alreday have the lowest RPMs at 70 MPH on the list.
 
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