02-21-2012, 05:00 PM
I also have a 636 and i run 14/55 (-1/+12)...as said before, it kinda sucks for the highway but, livin in cali, it keeps me from gettin speedin tix....and if you need help with chain sizing, vortex has a calculator for how many links you'll need.
https://www.vortexracing.com/shop/sprocket/111/
hope this helps
https://www.vortexracing.com/shop/sprocket/111/
hope this helps

