Hi I've recently did a whole rebuild on the engine, fixed the 5th gear throwing out problem and installed an HotCams exhaust cam with autodecomp and the bike now does strange popping on decel. Beside that it runs better then before (did shimming on the exhaust valves also and on valve 1 of the intake, the rest was ok). So on strong accel and then decel, it starts a series of rapid popping. Before changing the cam it popped fewer times like 2 seconds between poppings, now it's like gunfire 1/second or maybe a little faster Any ideas what could cause this? Timing must be right, installed like this : old intake cam with I punch mark aligned to cylinder head, hot cams exhaust cam one punch mark aligned with cylinder head, other at 12'o clock.