http://www2008.motorcycle-usa.com/374/9142/Motorcycle-Article/Thumper-Racing-Hot-Cams-CRF300R-Project.aspx
Jay Clark EnterprisesMotocross to the Extreme |
Thumper WR250X Big Bore
280cc big bore with a CP Piston, FMF Pipe, Millennium Cylinder plating and Thumper put it all together for Cycle World.
Thumper Racing Knows BIG with the KTM 600
Brian at SRC worked with Thumper Racing to make the fastest thing we have ever riden. Josh in his Fox gear is a Quad pro now!
Dirt Bike Magazine CRF230L Street Legal with 250 Kit
Custom CP Piston matched up to a Thumper Advanced Sleeve. Travis at Thumper got this running really good and way more power than stock.
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