shoggoth80 Posted March 9, 2006 Posted March 9, 2006 alright! got my YZ400 cylinder... plopped right on without any worries. the cylinder head studs are a shorter length than the DTs, but i have yet to try and remove the studs from one of my DT cylinders to see if i can pull them off. if i can, i could swap them out. the reed cages are different, although the early YZs and DT bikes seem to use the same reeds according to boyesen. so there will still be a bit of research, and parts sourcing... but it's a good start it seems. the head plopped right on too, save for the stud length. just the debate is whether i use a DT series piston, or a YZ series piston? i am leaning towards the YZ series. although i don't have a year range for the part... it was labeled on ebay as a generic YZ400 part. so, i am at a bit of a loss there as far as finding a example to go off of. were the cylinders stamped with a part number? oh yeah...one good thing... NO COMPRESSION RELEASE ON THE JUG! makes my life a bit simpler. now i just have to remove the cable from the cases. which shouldn't be too hard. i was thinking of using JB weld to plug the cable hole in the original aluminum/o-ring plug. should work, and be next to undetectable...or i could always get the hole plugged with a quick tap from a welder. either way, it'd work. now i just need to get that call from the used bike place for the cleaner bottom end... heh.
Guest Tomg Posted March 9, 2006 Posted March 9, 2006 glad to hear its working out! keep us posted the furhter on you get
shoggoth80 Posted March 10, 2006 Author Posted March 10, 2006 ordered a clean bottom end yesterday. should come with everything except for the cranshaft... which is fine by me. if i can get the old engine apart, i should be able to salvage that... provided it is within spec. the engine that that particular piece would comefrom suffered a piston seizure... there were bits of aluminum falling outta the bottom end, as well as a circlip. everything turns freely in there now after a bit of oil... the con rod on it is bent... but since it was piston seizure, and not main bearing seizure, and that the con rod is barely bent, i don't think the crank sustained any damage. so a thorough cleaning, new con rod, big end bearing, seals, and pitson kit should more or less get it up to snuff... then i have to source reeds/'cage, and rebuild the carb i have, or replace it with a better unit. that is still up in the air though. anyone know how to identify the year of the cylinder application? or where i may find a part number? i gave it a quick look over, plopped it on the engine, but have not had a chance to check it out since.
Recommended Posts