+1/-4 gearing

[dirklay]

I just installed a 17t up front, and 42t in back. The bike is much smoother starting off in first gear, and cruises at L.A. highway speeds at about 6k rpm, which is virtually vibration free. Better performance on both ends of the transmission, for less than $100.

 

[Marthy]

I just installed a 17t up front, and 42t in back. The bike is much smoother starting off in first gear, and cruises at L.A. highway speeds at about 6k rpm, which is virtually vibration free. Better performance on both ends of the transmission, for less than $100.

I ran 16/38 for 10K miles and it was perfect for those 400 miles day riding. Much better on fuel too... :thumbup:

 

[WHITEFOZZY]

is -4 normal? that seems like a lot

 

[dirklay]

"Normal? we don't need no stinkin' normal"

I wanted to go +1 to correct the speedometer. You can go to this website to estimate the impact on rpm at selected speeds with different gearing combinations. It is pretty cool and pretty easy to use.

I used Marthy's 16/38 as a model.

http://www.gearingcommander.com/

 

[toddjcruz]

+1/-3 on mine. Then switched back to 0/-3 for a little shorter gearing. The +1/-3 is great for long trips. I did -3 because then I can just swap the front back to stock to get better pull without having to do the back! That's a pain.

 

[CrazyCawi]

im still trying to decide just keep stock rear and do +1 or do a +1/-3

 

[Marthy]

I wanted to go +1 to correct the speedometer. You can go to this website to estimate the impact on rpm at selected speeds with different gearing combinations. It is pretty cool and pretty easy to use.

I used Marthy's 16/38 as a model.

Gearing Commander: Motorcycle Speed, RPM, Chain & Sprockets Calculator

I won't go any taller then that. But if all you do is Interstate cruising... it's perfect.