OzVMX Forum

Clubroom => Tech Talk => Topic started by: Nathan S on August 18, 2016, 07:11:33 pm

Title: XR250 sprockets.
Post by: Nathan S on August 18, 2016, 07:11:33 pm

Can anyone confirm that the rear sprockets are different between the 86-89 (drum brake) uses a different rear sprocket to the 90-94 (rear disc) models?

Title: Re: XR250 sprockets.
Post by: Mick D on August 18, 2016, 08:09:15 pm

I think they are different Nathan, but I will check.
They certainly are different drum and disc on the bigger capacity XRs.

What is the ID?  PCD? #of holes, and amount of teeth you are looking for? I have more than a hundred New ones ::)

Title: Re: XR250 sprockets.
Post by: Nathan S on August 18, 2016, 08:14:27 pm

Short version of a long story:
I need one front sprocket and a rear sprocket for both an 89 and a 91.

13/48 is standard, so something close to that.

I'll get PCD and ID measurements tomorrow.

Title: Re: XR250 sprockets.
Post by: smed on August 19, 2016, 10:42:21 am

My Link parts book says they are different,according to this book the 90-94 uses the same rear as 84 on CR's :-\, different gearing of course :)