XR600 Gearing

[SteveJC]

Hi all - just about to change the chain/sprocks on my bike. Currently using 14-48 which seems like a pretty good compromise for road and trail.

Was half considering going to 15-50 for a tiny bit more on the road, but with the option to drop right down to 13-50 if needed.

I can't find anything saying what sort of range the standard chain will work with, apart from several mentions of 13-14-15 / 48 combinations being used, so I guess that is OK?

Are there any problems with the front and rear lower chain guides if going to a 15 front and/or 50 rear??

I will make a new case-saver for the 15t, if thats the route I go. I prefer running 15t front sprockets if possible, as in the UK mud the 14t gets shredded quick enough and an extra tooth can only help!

Steve

XR600

XR650

[HeadTrauma]

I used to have 13/48 and now run 14/48 and it was a huge improvement. The 13 gave gnarly takeoff, but was really buzzy at 60mp/97kph. The 14 was a huge help and I have yet to stall on tight trails. In fact, I wouldnt mind a little more gear, so the 1-tooth difference of 15/50 would probably work pretty well. I dont know about the chainguide clearance, though.

[HairyScary]

Standard chain lengths usually have enough room to go up one on the countershaft. On the snails like on the XR600, this would take a new chain from something like #13 down to notch #6 or so (rough estimate from memory). There would be no more extra chain length left over to increase the rear sprocket any. You would need a longer chain (unless it is already 1/2 stretched to buggery already). With a longer chain, you could do the 15/50 down to 13/50 as you desired.