Hello, everyone i have a klx 250s and am considering going down one gear on the countershaft sprocket. Would like to know what kind of rpms you are getting on yours at 65 mph if you have done this .as i dont like hauling my bike around in the truck id rather ride it to the trails. My bike now is runnig 7000 at 65mph.

 

add about 500 rpm to what you're currently readings...(correction)

 

sorry for thread jacking but do you know if it affects your speedo at all?

 

no speedo is off the front wheel

 

i switch between 13t and 15t...no change in the speedo error...mine reads higher then norm...when the tire was worn down severely....speedo was reading +5 mph compared to gps actual...with fresh "fat" taller tires...the speed was almost accurate...+1 mph to +2 mph off now...

 

thank you for the quick response if only 400 differance i better give it a try.

 

thanks for the reply, i have the fmf megabomb with q4 muffler. Kdx snorkel moose racing air filter dyno jet kit runs great.

 

42/14=3
42/13=3.23
((3.23/3)-1)100=7.666% increase in your rpm

so...7,536 rpm at 65 mph for you....

 

see gearingcommander.com
ez to play around with

 

about 5 to 600 rpm difference