piston rings

Hey y'all! I have an all-stock 1977 XS360 that is having power issues on the right cylinder that is causing idle issues when coming down from speed (dying at stop lights if I don't keep revved up, but easy kick to start back up; erratic idle when warm). The right cylinder runs way colder than...

Hello all,its been a while but Im hoping to share some of the details this project, listing out what i can (my brain likes this method) and taking some hopefully decipherable photos. So far: Compression @ 140 / 135 - seems pretty low to me, I have these readings pre-tear down and ordered some...

Hello everyone! My name is John and I am from Metro-Detroit. I bought an XS400 last year but finally got to working on it this summer. I just took apart the engine and found the left piston head completely destroyed. Everything else looks okay inside of the engine though. I am wondering if...

So long list of problems to take care of right now. Piston Rings Left Cylinder burning oil like a siv, this is new. Gonna re-fit both. -(Just a guess, but leak down test was 130psi, add teaspoon oil, 150psi) Need a new chain as mine is kind of seizing and making terrible noises. Sprockets are...

Hey all just wanted to share, not sure how many sets they have but this is where I got the replacement rings for my 81 400. Pretty cheap compared to a few other vendors and their shipping was very good as well. They are actual Yamaha Rings too...

Anyone know if these are legit? http://www.ebay.com/itm/Yamaha-XS400-Piston-Rings-Set-x2-1977-1978-1979-1980-1981-STD-size-SOHC-/380588117495?pt=Motorcycles_Parts_Accessories&hash=item589cd1cdf7 Need the stock size rings and this is all I can find. Guy says they're the right ring but the...