I'd give it a chance to clean out any build up of old 2stroke in engine / exhaust before looking for a problem. Then wet side crank seal. Burning engine / gear oil looks and smells differently from 2stroke.
Think thats more to do with the adhesive on the stickers and the suitability of the plastic the tank is made from.
I'm sure that's true of many plastics, my experience is with Acerbis tanks and guards. Identical stickers will last till they wear away on guards, but lift rapidly on tanks.
Common answer is petrol but if you look at the underneath of the tank is that discoloured too? Usually not, my SWM tank was still perfect yellow underneath and also under the tank badges if they were removed, whereas all surfaces touched by sunlight went darker.The entire tank surface should be affected if it's caused by petrol shouldn't it? Ultra violet from sunlight discolours plastic, just look at garden furniture or kids toys like slides, plastic bikes, swings etc. If these tanks seeped petrol vapour like they're said to, if you left one in a closed garage for any length of time it should reek of petrol, so why don't I smell any?
I agree that ultra violet must be a major factor, however they definitely seep vapour as stickers last days rather than weeks before falling off.
If I'm not mistaken, that engine is based on Yamaha's TT-R125. The pilot jet on the TT-R is notoriously small and easily plugged. Just spraying carb clean at the carb won't fix it. Remove the pilot jet and make sure you can see light through the orifice. You can gently pass a fine wire thought the jet's orifice to clean it.
Yea tried the reset. N ye think the bank sensor could be at fault..its started only fur a few seconds. But in reality i was using body spray not easy start..i will get some EASY START tomoro n give it a go..if i can get it to keep goin n keep sprayin it, it may pull the fuel thru n run on its own. I was thinkin it may have got a bit o water in the fuel some way but a doubt it..tank never went under..
Good luck with that. Hard hats in the Motherwell area, look out for low flying cylinder heads ....
I had a brake in with the locks in the link above, they simply bent the door. You need to prevent that with other devices or maybe by bracing between them.
I've used them again on the new door, but into the ground not the frame and with a bar locked down on front of them.
The instructions have you position the locks approx 300mm from ground, where were your original locks positioned ?
159 engine rebuild
in Bultaco
Posted
@johnjsy. Sorry to hijack thread, but why do you say fully synthetic oils are not suitable for older engines ?