Derbi Revolution J.Costa Race Variator and Clutch Kit 305 These bolt right up in

These bolt right up in place of your stock intake and kick the carburetor out to the variator side of your Honda

Malossi part number 3219491

a greater mechanical "ease" at high speeds and a constancy in performance you've never experienced before with the original version

Flywheel is marked 6v50w

This kit will require boring your cases

Derbi Revolution J.Costa Race Variator and Clutch Kit 305 These bolt right up inA variator and clutch kit like we have never seen before. J. Costa Race kit for Derbi Start 3 and Start 5 engines. This kit includes a front IT50Pro variator with 3 sets of weights for fine tuning. The rear clutch uses a unique transverse action for a faster response than a traditional clutch. Is reinventing the wheel the solution for your track prepped Derbi? Maybe? J. Costa developed this setup with the race course in mind.