Sunday, February 12, 2017

14T vs. 13T countersprocket on WR250R (updated)

Stock gearing is 13/43 on the WR250R. I've been running 13/47 with good results, and thought that bumping to 14/48 would give better highway performance while leaving the easy option to swap to a 13/48 for dirt use without requiring much chain adjustment.

Unfortunately, a 14T with chain leaves uncomfortably low clearance on the bike if also running with a case saver like the one I made.

Here are pics of a new Dirt Tricks 14T compared to a worn 13T. I'll be sticking with 13T and have opted for a 45T sprocket on the wheel to test with some Mitas E-07 tires that I'll be testing this year.

Here's view of the 13T with 48T rear sprocket with new chain mounted to show clearances. It's a bit tighter on the rear than I'd prefer, and I expect the guide will show accelerated wear. May need to look for aftermarket sliders and guides made from harder material and with more clearance. 

Note: Yes, I had a brain fart and accidentally installed the quick link clip backwards (closed end should face chain direction). I fixed it after taking this pic.  

1 comment:

  1. Nice write up, I like your blog. I am trying 13/47 this year. I have used 14/52 for a while but it's tight at the case and tight at the chain guide at the back wheel