picked up an 84 atc70 for 40$ bucks ! need help.

[86trizinger]

Wholesale cycle in Ohio had Piranha 140's for $330 shipped with wiring and electrical. I don't see them on their site right now though so you may have to contact them. Mine runs great.

[atcmonster]

if you decide getting the lifan, would u sell me your pullstarter?

[Sick200x]

Check the valve clearance, a valve not seating fully would make it "backfire". Usually a leaky intake will cause it too pop through the carb, exhaust leaking pops through muffler. As for timing and spark issues, just go to the nearest lawn mower shop and get a little single cylinder points conversion module. Can't think of the name of it right now, but they're only about $15. Usually you can get those little 70's running well for cheap. I'd try that before swapping engines.

[86trizinger]

The Piranha 140 I was told is a better engine then the lifan 140. Mine was 330 to the door with carb and all electronics. It's didn't even require the carb to be tuned very much.