Scooterotica

10 inch Terror wrote:

eden wrote:how did you set the timing?

I used a strobe gun that i purchased from Readspeed. It was spot on, i'm thinking either air leak or wrongly jetted carb. It's all a learning curve and with hindsight i should of let a pro build the engine.

probably a better question is how did you set your ignition marks that you strobed it to?

cezeta wrote:are your casings welded to take those transfers and crank case feed?

Yeah mate JB done all the tuning work and the casings are matched to the cylinder ( beautiful job )

I followed Stickys excellent book ( no blame attached or intended ) and used the correct tools and timing disc from Cam Lam. Im 99% sure the timing was spot on, as i've already said, it's a learning curve and i've learn thats it's best to let an expert build a highly tuned engine but we've all been there and done it.

what plug was fitted and squish clearance used/check to see if your pilot jets blocked,check fuel flow do a test,is there correct tap position alignment ,the reed block and manifold are hard to seal and need a good sealant to make air tight

Iv'e double checked the timing and it was way way off ! looks like that was the cause of it. I'm waiting on the new piston, then it's off to JB to have the top end built again (properly this time ) Lesson learnt.

i managed to do the same on a mugello kit

the problem turned out to be a dodgy inlet manifold which wasnt seating properly on the inlet port, causing an air leak...