250-500cc WR250 chain length, Whats right?

Hi all, been giving my 2007 WR250 an overhaul and am in the middle of replacing the chain and sprockets. I've got Renthal sprockets, gearing 13/48. I've been sent a 118 link chain and it's way too long. How many links do I need to remove?

Also replaced control cables and fitted a FMF Gnarly with the standard end can. Would this system work better with the FMF end can?

Look forward to your replies.

On the chain, check the Hall's Parts catalog for your year. Looks like 112 w/ stock gearing

Don't know about the exhaust

Many thanks for that, that'll be a big help. That catalogue is great. Once again, thanks.

stick it on & measure it up where you're happy re axle position. allow a little bit of adjustment for stretch. cut to size. can probably wouldnt make much difference, pipe will. fmf will look better & make you think you're faster & thats the main thing right?!

Axle forward, put chain on and mate up to rear sprocket, chain must not be tight at this stage as when you compress suspension chain will be over tight. Better to take out less links that to many.

In your case since you already have the chain with 118 links, so I would do what Shawbagga stated and cut the chain to your personal preference. You may find that 112 would put your axle too far forward. Or that the 114 links would put you too far rearward.[/quote]


This is exactly what I did with 13/50 gearing on my wr300.
112 put the axle forward and 114 had the axle in the middle of the range for that gearing.

Great info, thanks. I decided on 112 with the gearing that I run. That put the adjustment blocks roughly in the middle of their travel. I still havn't got to take it out yet with the new pipe and all, but did take some pics so will upload and hope you enjoy them.

Treated myself to a Husqvarna enduro jacket this weekend, so will be dying to hit the trails next weekend.