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david Started a new thread Outdoor Nationals Going Under The Lights

1/25/2012 11:38pm
Thunder Valley MX will host the first-ever night round of AMA Motocross on Saturday, June 28, for the 4th Annual Toyota Trucks Pro Motocross National Presented by Division 7. This historic race will mark the fifth round of the AMA Toyota Motocross Championship Presented by FMF, creating a milestone for the sport of American motocross. Musco Lighting has jumped on...
This forum thread has 13 replies.

david Added a reply to pro circuit cams

10/29/2009 9:44pm
I would use the PC valve springs also. It will help reduce the chances of valve float. Stock valve spring are rated for stock lift and rpm. PC valve springs and retainers are rated for their cam lifts and rpm

david Added a reply to KX85 power valve governor problems.

10/25/2009 11:08am
Has the governor had any modification? The bearings normally fly out of the governor for 2 reasons. The free length of the governor is out of spec, or The ramps have been modified and clearance is excessive. Pro Circuit use to build mod governors for their engines. I believe they just stiffer springs.

david Added a reply to Stroupe?

7/5/2008 11:07am
He is out for Red Bud, but I think he just has mono

david Added a reply to HELP!! ASAP 08 CRF450R

4/29/2008 7:15pm
I would start with the head pipe gasket and check for cracks in the exhaust. If that doesn't seem to do anything check the slide on the carb. and make sure the two piece slide is inserted correct.