We have a modena Kk1 with some weird issues. We just cant seem to locate the problem.
Kart was running awesome for a bit then one day take it to the track and it wouldnt want to rev past 7-9000rpm. Not matter what we did, it would just bog down like it was choking or hitting the limiter.
Things we checked: spark plug(first thing) , silencer, coilpack, fuel, carb.
We then assumed well lets get the top end and bottom end done as it was time for one anways. The shop then said hey give me ur motor and ill give you a newer modena with the updated piston with a fresh rebuild on top and bottom end. Swapped out the motor and took it out…same exact issue. We are going crazy here. Taking it to the shop on monday Nov 4. Just wanted to see if someone has any ideas before we do that.