[BoxxerSix]

DYI trick for those doing their own rebuilds.......to aid in cleaning ring grooves on pistons or fire rings in cylinder tops go pick up some permatex gasket remover spray. Comes in a blue can. Soak any carbon deposits for a few minutes, then flush with brake clean. Repeat if necessary.

The gasket remover spray has some effect on carbon, but does a neat job at really softening the hard stuff up.

WARNING....this stuff will cause a painful sting if even a pinsize drop hits your skin so wear long sleeves and goggles!!!!!!!!!!!! It's not going to leave any permanent burn on your skin but it sure as hell hurts. But if you get it in your eyes is can do damage so just take precautions where needed.