Italjet 49cc engine won't start but will fire up for few seconds

SOURCE: starter motor turning,but engine doesn't!!

Sounds like you have a problem with the timing chain and the valve timing is out meaning a valve is down when the piston at the top causing an interference. Take the spark plugs out and with the bike in a high gear and on the center stand see if the engine will turn over by hand by pulling the back wheel. Don't force it or you will bend a valve and damage the piston though it probably has happened already. You would need to open the engine up and see what is happening with the timing chain, valve timing etc and go from there.

Testimonial: "Thanks,could not get past 2nd gear,did get to turn crank over,not sure yet if cams turning,I think the starter chain is u/s.engine strip here we come."

SOURCE: 84 FXST Starter Kicks out before engine fires

I'd be willing to bet that it's not "kicking out". The tale tell sign is that the starter keeps running. As long as the plunger in the solenoid is pulled inward,which moves the starter drive into engagement with the ring gear on the outer clutch drum, the start will run. If the starter drive were being "kicked out" the solenoid wouldn't still be engaged and the starter would not continue running.

I would come closer to thinking that your starter drive is bad, the bendix. These things are notorious for going bad, especially the cheap Chinese made aftermarket ones. I've replaced them with only a few weeks use on them. If you buy a new drive, get an Accel, made in the U.S.A.. Simply pull the starter drive out and clamp the shaft in a vice with aluminum jaws on it. The little nut on the end has left handed threads. When you put the nut back on, put some Red Loctite #271 on it. This ought to solve your problem. If you have anymore questions, drop me a line directly at [email protected] Good Luck!

SOURCE: italjet f 50 turns over tries to fire but wont

Well, it is either gas or spark, normally. Guarantee that there is spark at EACH plug. Try artificial enrichment with external fuel source...

KD Grayson Heating,Air conditioning & Refrigeration

• 499 Answers
• Posted on Nov 01, 2010

SOURCE: Honda PC 800 Starter motor sluggish, barely turns

Try new battery, check grounding contacts for corrosion, clean the contacts on batt cables at both ends.

SOURCE: starter

just fitted a new starter motor on my Honda VTR Firestorm. The bike started fine the first two times, however on the third go all my electrics blew. Any ideas where i should start.