Im currently racing an MC21sp. Its got a HRC loom fitted,JHA pipes,HRCderestrictor and running 195/190 jets. About 2weeks ago I siezed it going down the main straight in practise. This is not the first time though and its always just a matter of time before it goes POP! My last sieze made a hole in the botton piston and blew the hole top of the spark plug away. The funny thing about it all was that the temp was only 70degrees and it happened on the 4th lap. I've bought a new PGMIII box a thew months ago(thinking it was causing detonation on the pistons) but my probs are still not solved. Im also running Wiseco RM125 GP pistons with the barrels skimmed for the correct clearance. I checked the top piston and it looks perfect???? Any help would be greatly appreciated.
Thx a ton
