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Qik question, Zongshen 140 and Lifan 140 crankshaft the same??? Can find Lifan parts easy but Zonger parts don't seem to exist.

Found the the problem, the rotor keyway on the crank is stuffed little bits of metal everywhere stuck to the rotor! The rattle ended up being the rotor nut hitting the cover. Did a dodgy fix-up reset timing and valves, started second kick and ran well but didn't run to long before the dodgy fix...

Ok went and played no visable leaks. Pulled carby and it all checked out, all ok. Started up and its not sounding great, sounds like a rattle in the engine, backfiring a little and bogs down when you open the throttle. It idles ok for a while then pops and dies??? Have backed out the air meter...

Thanks for the info guys. It supprised the s*** out of me! Is any one wrapping their exhaust? Whould hate to touch it, serious burn potential. Have reset valve clearances, exhaust valve was out a little, will give it a good check over, bike was running really well before it went off song. Then...

Hi Guys, Update, Got all the parts together and bolted the engine back together and it has run beautifully for 2 weeks now. Then today I noticed it wasn't sounding right and running a little ruff, took it into the shed to tinker. With the engine running in the shed the exhuast pipe was glowing...

Strip the engine down last night. Timing chain guide roller had a seized bearing and the chain had chewed out the roller, oil wiper ring shot but other than that not to bad. Anyone know where I can get a new timing chain roller from can't find one ebay or web??

Yep! Have everything you just listed coming plus a couple of other bits. Pulling the engine apart tonight.

Hi Guys, new to the website and forum. Just bought an 08 DHZ 140 with the Zongshen motor. Picked it up cheap with the idea of fixing it up for my kids. It runs at the moment but makes more smoke than a blue light disco smoke machine and leaks oil/smoke thru the exhaust manifold but other than...