A 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.