Building car with Aprilia Tuono engine. Do I need to up-rate the clutch springs?
Any suggestions

Rob

Try it, if it works great, if it slips then upgrade

Probably not if they're OEM If they're aftermarket chocolate then maybe.....

I would just try it as it is first. As I mentioned in my U2U, I dropped lucky finding a set of HD ones from a broken bike but I've never seen them listed as a separate option by any of the usual suspects so you may have to get a full kit anyway.

The advice I got from Z Cars re my 'Busa engine was leave the clutch springs as standard. That way the clutch will act as a torque limiter and save your gearbox from being overtorqued or worse.