Hi guys,

Just lifted the hed off of my engine and measured up a few bits....

Head height 138.7mm good or bad?

Bore 90.7mm (think thats std bore size ) with about .5mm of piston movement side to side again good or bad?

Pistons have the markings YB0618 on them (and next to that really small is 512 E 0490)....all have a No 2 and a forward arrow on other side.... normal?? std compression?


The engines going in for rebuild soon anyhow as it's not known condition/mileage but just curious.......
Also a jet black buildup on the pistons...really hard crusty pellet like areas that have built up. picked it off and no harm done but what would cause this?? looks to have been overfueling a bit so coudl this of caused it?

Cheers
Dan