Sprocket Change

I just changed the countershaft sprocket on my 2010 F650GS. I added a tooth. The only place I could find an 18 tooth sprocket was Tourtech. I have put about 500 miles on since changing it, and I have dropped about 500 rpm. When I added the Tourtech saddle bags, I gave up several miles per gallon. Their boxes hang out on the side like mini walls. I am pleased to report interstate mileage has increased 4 miles a gallon. I have not noticed any struggle to take off from a stop. Now if I could find a 38 tooth rear sprocket.........

Randy

Wow ... I'm impressed.
Thanks for sharing the results of the experiment!

I Did It On My F800GS

I changed my front sprocket from the standard 16 to a 17 tooth unit. My mileage went up by about 5 mpg, and the engine is much smoother. It is now in a more relaxed rpm portion. It hurts a bit a slow speeds, but the trade off is worth it, especially if one does a lot of highway miles.

You are trading for lower revs at highway speed when you go up a tooth in the front. The price is reduced torque. Personally, I don't like this trade off.

Mpg figures are suspect, depends where the odo gets the feed. Use gps rather than the bike gauges to calculate mpg.

sprocket

My mileage increase is off my GPS, not the odometer.

Thanks
Randy