2007 Yamaha WR 250f Re-Jetting

This is a customer’s bike that had some serious carburetor issues.  It was having trouble starting and coming off an idle, but eventually got so bad it would not even run.  I went into the carb several times and did find some clogged orifices that once cleaned, caused the bike to run a little better, but the main problem was 2-fold: Bent Needle. Bad gas. The WR comes with a non-adjustable needle, so I removed the bent one and...

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2006 Yamaha YZ 250f top end rebuild

I got the head back from Reeves racing engines and I would have to say that he did an excellent job of cutting the valve seats and installing the new valves.  I highly recommend him and his pricing is very reasonable.  His number is listed in an older post if anyone is interested in having him do some work for you. Here is the head assembled and ready to be installed: Installing the head on the cylinder and re-shimmed the valve lash:...

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