thumper

Hello, Since I now have a 08 KTM 505 XC-F to ride I am looking into sending my 08 fe650 head to Thumper Racing to have them do their head mods, most likely Trail Port. Jesse of Thumper Racing was recommended to me by hillclimb champion (Ret.) Robie Peterson. Has anyone used them or can...

New member there, just sold my Crf250x and want to get a thumper as I think it will fit my riding style more. Any known problems? As I searched online I found that it's a bit harder to find replacements and other mods like ktm do, at least in my country. At the moment I see the te300 as a...

Gday everyone I thought I'd share with you all my experiences with the above montioned. I now have 7 hours on my TR 610 kit which I installed last year, (work and family commitments have soaked up the lions share of my time) The piston is a custom CP forged unit withe the company logo neatly...

Has anyone built a FE570 Berg with the Thumper Racing 610cc kit yet ??? Looking for some feedback from anyone who may have already done one before I pull the trigger

Not my pix, His first race with the 550 Berg and finished 5th in Pro out of this many, YEAH HUSABERG!