st70 problems

I can't seem to track where these handles bars have come from, not on any fotos online on these bikes except a ct70 but with a cross bar. I quite lime them if I could sort out the play in them with new rubbers.
Also the exhaust is weird as it sweeps up and then finishes behind the back forks and under the seat

unfortunately cmsnl have discontinued oem 53134-030-010 any other suppliers?

finally got it started but it is breathing oil from the exhaust.
there is a broken exhaust stud that cannot be tightened and i am planning on trying to drill out and replace but this breathing oil is this bad and means the engine need an overhaul?
any advice before putting it in a garage?

Hi there. Just thought I'd give you an idea for getting the exhaust stud out.

Do what Brian said and give it a good dose of WD-40 or GT40 which is cheaper lol. Then get yourself a small blow torch and gently heat the surrounding metal. Don't hold the heat in one spot, move it around while using some grips on the remains of the stud. You will have to be careful with the heat as the head is alloy and if you're not careful, you'll end up melting it. The alloy will expand quicker than the steel stud and you'll be able to unscrew the stud with no force. If it's stubborn, stop every now and then and squirt some more WD-40 at it and try again.

Please don't do what a previous owner did to my Chaly. They tried to drill the stud out, snapped the drill bit in there, then tried drilling that out with a 10mm drill. It was obvious that wouldn't have worked and as a result, I had a lovely time trying to get a 6v engine running with 12v parts as good 6v heads seem to be quite hard to find.

As for the smoking, you may have some perished valve stem seals or gummed piston rings. If you're lucky, the rings may sort themselves out if you leave some Paraffin or WD-40 soaking in the bore. Be sure to kick engine over with the spark plug out to get it all out before starting up. You might want to change the oil afterwards as some/all of the Paraffin will find it's way into the sump/crankcases.

It could also be oil level. My ST smoked badly when I got it running and it turned out to be slightly over filled. It doesn't have to be much.

Good luck
Jim

thanks tried that in the end had to drill out, unfortunately my pilot drill bit broke but luckily drilled it with the next size up and retapped it, fitted the exhaust back with a new gasket, changed the oil and runs ok now.