pistons

Hey everyone, I am new here and in the process of my first XS build. I’ve been reading and learning from the form, and love all the amazing knowledge here. It’s been my goal to get my hands on a XS650 for years now and just landed two engines in a trade. I just broke into the “cleaner” of the...

I got some new .5mm oversize pistons and rings (second oversize) for my xs650. What should I have my machinist bore my cylinders to? This is the first time I am having this work done and I am unsure of the correct tolerances.

Hey guys, Am hoping that this is a nice easy one that someone who's done this can chime in and solve it. Am just in the process of installing a set of the Shell/JE pistons from Hoos and just wanted to confirm the order of the 1st and second rings. One has a chamfer/bevel on the inner upper edge...

Hi all, for a 1974 engine I am bulding from parts from everywhere :/ I'm after the following :- 1. A couple of standard 447 Pistons 2. Valve springs, seats, tops and collets 3. Left hand side casing 4. Alternator stator 5. All the starter gear setup behind the clutch Due to the virus I no...

Vai tomar no cu.

Gentlemen, I am intending to ceramic coat the pistons for racing two stroke. I have used professional coaters before and been satisfied with the results. However the cost of doing 4 pistons top and sides is an eye watering NZ $231. I have found this source for DIY ceramic coating material do...

Hey all, first time posting to the forum - though I've been around on the 650garage and a few others. I'm not new to the xs, however. Mine (1982 Heritage Special) has been in a perpetual status as project / PITA for a few years now. Bought it straight out of a muddy ditch next to some guy's...

Howdy, first time posting, though I've been lurking around in the shadows of the piston-clearance threads for a while... which brings me here. I'm looking to bore my cylinders and move up a size. I'm hoping somebody has a set of used/spare oversized pistons (447 type for an '82) that I can buy...

Certainly not a new topic, but I'm trying to appraise the condition of my pistons, piston rings, and cylinders. First, I want to replace my piston rings, but am unsure what size/dimensions I need. The local Yamaha dealer wasn't much help since their computer database archives nominal sizes...

Does it matter if I put the the Pistons in from the bottom or the top of the cylinder. I'm rebuilding my 76 xs650. Bought a complete kit from xs650 direct with the bigger cooling fins. I'll be looking for quite a few tips as I go. Do put the Pistons on the connecting rods and try to bring the...

Okay guys I checked with my mechanic and he told me that my cylinder was going bore out to 75.5 , I need to order a +50 piston and then he can fit it. I just want to make sure that's the right size to order. I don't know if my wordage is correct. Hopefully you guys can give me the go ahead.

Can calipers be cleaned up? Solvents and/or wire brushing? When is caliper replacement warranted? I plan to replace the pitted pistons and install new seals.

Hi all, it's been awhile since I've been on here, and wow... I feel like I've forgotten everything I've learned. (Mad cow disease!) So, I'm hoping to be pointed into a direction- The issue is a hole in the right-hand piston, and what would have possibly caused it. After sitting for a...

I ripped off my head after finding a bolt in my intake port (it didn't fall into the engine). I had no compression in the left cylinder. The cylinder wall look extremely smooth no scratches at all. However the piston head has marks on it from where I suppose the valve hit the piston. The...

OK...so while getting into my top end to reverse my cam shaft (see thread http://www.xs650.com/forum/showthread.php?t=23472), I decided to switch out my cam chaing guide. Then I decided that my gaskets/seals should be replaced as the head gasket was leaking a bit of oil as well. Once here, I...

Hi there. I've a 78SE and I'm in need of a rebore. Its already 1st oversize so I'm looking for 2nd oversize pistons. Its a 477 crank btw. I'm struggling to find anywhere in the UK or Europe selling them. Can anyone point me to any sources I dont know about please? I've tried Yambits, they...

Okay, I finally decided to break down my engine to find out what this pesky knocking sound was that kept getting worse and after believing it to be piston slap, now I'm pretty certain. Here are some pics. Give me your opinions on whether or not this could be the situation and also if I do need...

Hi people, I'm looking for some guidance about pistons, rings and bores that I can't find in the many threads I've looked at on the subject. What a ton of great resources out there for this bike. A friend & I pulled the jugs on his 79 650 Special to do the base gasket, cam chain guide, valve...

Do you need to rebore the stock cylnders or is there enough room to use the 0.25 oversie on a stock cylnder bore? Cuz without the rings on it the 0.25 piston slips right through the stock bore no problems

I know it's been beat to death..i guess like every topic on here. My one bore is worn beyond what acceptable limits. (don't remember the #'s now that i lost the paper he wrote on) What is the max oversize i can go without needing new liners. My bores were not gouged or anything, just out...