I stock motocompo revs above 7000rpm with no problem. But it tops out at about only 25mph. Just wonder, how did you achieve 30+mph with only 5000rpm?
I just made a noobie mistake and blew up my new piston yesterday. I took it for a ride after top end rebuild for a about 30miles and all of sudden I heard some clicking noise and engine then seized.
Maybe it was running too lean since I used the factory carb setting with a high air flow pod. But the plug was burnt nicely to my noobie eyes, it was dark brownish colour.