Ok guys needs some help asap ready to set this thing on fire..thing would never start valves were tight i adjusted the calves to correct shims on intake n exhaust have plenty of clearance in between cam lobes n shims..problem is i done set tdc about 10 times now its dead on..will not fire one hiccup sprayed gas into carb while cranking n while not all it does is make a loud backfire n some flames come out. Its like valves are tight but there not.idk how it could be firing wrong with it at tdc. I need help asap carn is clean have plenty of spark bright blue.

 

Sounds like timing is still wrong. Check the flywheel keyway to see if it sheered.

 

I checked that its not sheared.

 

Did you pull off the flywheel - its sometimes hard the see. I thought the same on mine, until i pulled the flywheel. it sheared it and only moved an inch or so but thats enough to make it backfire and not start.

 

Yea i pulled flywheel off.even if it was sheared i would be able to hear the flywheel spinning