Originally Posted by looper

Hey Massive mods, Grizz or anyone else that would know. i got a question for you, today i took the b21 out for a spin, this was the used one that came with the new one i got from that guy, Well he told me this one ran well and had a lot of life left, he was wrong, this thing has zero compression, once it warms up it goes super lean then dies,.. no biggie on it though i kinda knew there was a reason it was being thrown in the deal for a song.

Story time is over here is my question, I have seen commented here about different piston and sleeve sets fitting different engines, (there was mention of putting a 5p sleeve in a 3p mill) with this blue headed 3 port is there any other p/s sets that will fit in it? im thinking since i am going to have to do something with this mill i might as well get it running again. my options are pinching the existing sleeve or just doing a proper rebuild to it. When it was almost at temp and right before it went crazy i was liking what it was starting to do.


oh if you have a blown engine with the long lsn in there and NEED to get a tank out of it--- Flush HSN 3/4 turn out from flush LSN. warning though with no compression it will still get hot. try to keep the rpms up since it will have no bottom end (lean bog)