I re built it again and got a higher compression this time but kind of sounds like the timing is out. Not sure how you check the timing on a 2 stroke? I think I'll strip and rebuild from the ground up with all new kit.
Ok, so what could stop fuel getting from the carb to the plug? The carb is definitely getting fuel and I've replaced the petal but not convinced the fuel is getting to the plug. I tried easy start and no joy so just wondering how I could test if she would start if I can get it to the plug
If it's cranking and the plug is staying dry then the vacuum created by the downstroke of the piston isn't good enough to open the reed petals and suck fuel in. The compression needs to be 100psi or above.
Ok cool so I ordered a race crank and have stripped her to bits. Just got to work out how I can fit the new bearings in to the casing fit the crank and fit oil seals so they don't leak :-/
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That's brilliant thank you I've started watching them. Wish I had seen some of it first . When you split the casing a small dowel thing fall out. Can you recall where that came from or goes as mine did the same but can't see anywhere obvious for it lol
I have the 2 longer ones that stayed in the casing but this was a short style one. Maybe like a little spacer?
Ah no, not a spacer. I just watched the video back. That thing that fell out was one of the oil pump nuts. They are square nuts that go into a slot in the cases.
Ignore the eBay bit but it's the part I'm not sure where it goes lol. Does it just rest in the starter hole?
Yes goes in the hole furthest to the front of the belt case. Not quite rest in there, but should press in easily.
Slight delay as I had to wait for time off. I have the new bearings in and new crank in new casing, seems stiff to rotate the crank. Hoping after a few rotations it'll free up. Fingers crossed
After the engine halves are together and the bolts torqued down again, tap the crank each way and you should find it loosens up a little.