Two SC 61's = trouble
Join Date: Jul 2001
Check your spark advance it is quite common for the small springs on the mechanical advance to break or loose there tension.Try to mark your pully at the max advance.I don't know what it is but say 28* mark the pulley at that. Then with timming light at say 2500rpm it should not go over that mark on front pulley. Some tune THAT way, saying it's when the engine is actually working as against when idling.. Spark plug leads fireing order right?If the valve guides are worn will do this also due to build up of carbon not good for good combustion..A problem on high mileage Clevo's due to there valve angle and rocker ratio..
Another is it getting "hot" not nessessary over heating but the combustion chambers/ heads maybe getting hot esp in this weather. Running too lean can cause it too..
A trick we used to do years ago was pour slowly some upper cylinder lube [2 stroke will do] down carbie about 1/2 a cup. Leave it some time to soften any carbon, then take it for a good hard drive.Some water injection does help also..
Don't be afraid to try something new. Remember, amateurs built the Ark...Professionals built the Titanic!
Tuned & maintained by "Peppertree Perfmormance". Dart block, Scat 4340 steel crank, Custom C.P pistons.Oliver rods.. Mal Wood twin plate clutch.. Twin SC61/2's,482 rwkw/ 645 rwhp..
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