Two Stroke Motocross

Two Stroke Motocross Forum => Technical => Topic started by: luthier269 on September 17, 2012, 12:23:46 AM

Title: Chain Adjustment 2005 Cr 250
Post by: luthier269 on September 17, 2012, 12:23:46 AM

The manual says 25-35 mm about half way on the swing arm, but that seams way to tight. On our 2001 cr125 I've used the tree finger method and it has worked well. How our some of you guys adjusting it?

Title: Chain Adjustment 2005 Cr 250
Post by: cnrcpla on September 17, 2012, 12:41:13 AM

I use the three finger method on my 250. I don't see why it shouldn't work for your bike 

Title: Chain Adjustment 2005 Cr 250
Post by: SachsGS on September 17, 2012, 02:04:48 AM

The tightest point for the chain as the swingarm travels through it's arc is when the countershaft sprocket, swingarm pivot and rear axle are all in a straight line. Get a buddy to put his chest (her?) on the bike's seat , grab the swingarm, and pull down untill all three are in a straight line. Check the chain tension at this point (you'll want a little play) and adjust to suit. Having the chain too tight stresses the components badly and, for example, will lead to tell tale cracks around the rear motor mount where the swingarm bolt passes through.

Title: Chain Adjustment 2005 Cr 250
Post by: Stusmoke on September 22, 2012, 03:10:16 AM

I've always used the three finger method too, but for my 2001 CR125 its about two fingers and its working really well.