engines

Hi is a 1976 crankshaft interchangeable with a 1978?

I was working on a mini bike engine the other day. The hole in the crank where the clutch mounts had buggered threads. I got out my tap and die set to clean up the threads. As I was turning the tap the engine shifted and the tap snapped off. This left a 1/4 to 3/8 inch piece in the hole. I...

I bought a reed valve like MikesXS #15-0677 cheaply on eBay over year ago and had it mounted on the breather outlet of my '82SJ with the shortest piece of 1/2" hose that would hold it on. It sat crosswise, so wouldn't drain any oil that might come through the breather, and I didn't like how it...

VERY new to Yamaha's so I'm not sure of the year to year differences yet. I have a 1976 frame with no engine. Was the 650 engine the same thru 1980? Thinking if I could find a different year that would bolt up I might have myself an easy project. Thanks in advance!

Hi , mate of mine whats to swap his engines around and wants to put a 447 engine in to the early frame 70-73 if i can remember its just the front or rear :banghead:engine mounts that are different any help or info would be great

Well, it's getting hot out there, so time to revisit one of our favorite and most emotional subjects, and one that remains a mystery......why does the right side cylinder generally run hotter than the left? Friendships have been lost and small businesses created over this subject. Because...

An engine I have bought has this number on it can anyone tell me what year it is and also what model it was from. Number is *3L1-022809*. Cheers:)

I am new to xs's and read the forums deliberately but always seem to come up short on my specific answers, so I beg patience. I am prefectly willing to reveiw a prior thread if I have missed it and I am pointed in the right direction, so here goes. CDI to points conversion- I have been...