piston

Looking for parts for my 1979 xs650sf. Clutch hub Piston 75mm with 22mm wrist pin 6 clutch springs and/or bolts Located in Bakersfield, CA Please let me know! Thank you!

So I just got back from visiting a highly recommended local engine machine shop where I was hoping to get some advice on what size pistons and rings I should purchase. When I got there the owner of the shop flipped the jugs upside down, measured the bottom with a pair of calipers and said "Still...

Looking for tips, spitballing a rebuild with new pistons. We can get 91 octane non-oxygenated/ethanol free gas is a lot of places, so I'm thinking about high compression for 91. I have a Hoos Racing Shell#1 cam, and a stock cam on the shelf. What sort of compression ratio should I be looking...

so far from my own research i have found some engines specs and 2 different posted compression ratios for the 1981 xs650. i would like to know all of the technical specs if possible. i have searched this forum and others and have come up inconclusive for data. These are what i have found: 75mm...

Edited for brevity: I tipped my bike over two days ago and since then it has been spewing white smoke and now oil from the exhaust. Prior to that it was running perfectly, no leaks, no smoke, nothing. Checked oil level after tipping and it had lost a bit, so I refilled. Guessing that oil went...

Hello, I'm knee-deep in a top-end rebuild on a '75 XS650B. I've had a few hurdles but thanks to this forum you guys have helped me through. Unfortunately I'm really stuck now. Literally. Background: After a successful honing job on stock cylinders within the jug, I put new stock-sized piston...

Hey guys so i just got a 1974 xs650 with 12xxx miles on our. When i got it i did an oil change, spark plugs, air filters and just some normal maintenance. After everything it was running pretty good (carbs still need to be cleaned) for about 10 hours and then it decided not to accelerate. The...

I'm working on timing the cam to the pistons. I know that both pistons move in unison but fire simultaneously so there's no question which piston should be TDC, but rather which cylinder should be in its compression stroke when the cam notch is upright. I first thought to assume it would be...

Hi everyone, I'm new to the site and these bikes but I'm 17 and just started my first build on one. Anyway I picked up some stuff and a seized engine real cheap. I opened up the engine and turned out getting lucky because only one piston was seized but both were pretty carbonized. a valve...

I just took apart my engine and the number 3 and 1.00 are stamped on top of the pistons. What does this mean and what size piston rings should I buy? I'm a bit of a rookie on engine rebuilds. Thanks

XS650s are the best! So I am rebuilding a barn find. I have the engine taken apart and I see that one of the pistons needs replacing. One of the rocker arms (exhaust side) for it sticks if you push it all the way back, but not forward. None of the other rocker arms stick at all. Do you think...

I have to wonder how long did this take? What started this? Did he make it home? What did it sound like? The guy I bought it from said the engine "didn't turn" Wonder why? OK I am kidding on the repairable. Oh the piston was still free in the cylinder, a chunk of barrel broke off and...

Hi all! I'm trying to find the stock piston ring groove width for a 447 engine. Reason being, i'm getting some TotalSeal rings for it, and they don't have the specs on file. I don't have the pistons in my possession as of yet, else i'd just measure them myself. If anyone has a ring kit...