Post by carpespasm on May 28, 2013 9:31:43 GMT -5
Hi all, just getting around to remaking my account since the old forum is kaputsky 
but I just picked up a 50cc GY6 for a song yesterday in overall good shape, but with a no-start condition.
The last owner ran it from new to 11k miles, good maintenance, never dropped it, and was selling it because he got a new one when it was out of warranty and stopped having what sounded like a simple valve adjustment issue he wasn't inclined to know how to do. he'd already bolted on a new carb and starter hoping to fix the problem but I guess valves scared him.
Anyway, I got it home, took the head cover off (inside the valve cover everything's immaculate, good sign right?), and adjusted the valve gaps, put it together and still no start. Hmm.... Tried starting fluid with the carb off and I get a fairly heavy and continuous puff of what looks like partially burned air/fuel coming from the air filter box and when I kink off the crankcase vent it seems to build up a fair bit of pressure.
So anyone know if I'm in for a tear-down, or is there something else I've missed that might be easier? Is 11,000 miles getting close to dead on these motors even when it's been changed with AmSol and it looks like new inside?
PS: I won't be able to get a compression test done on it for a few days to be certain what the compression measures but it does draw what feels like fairly normal suction on my hand when I cover the intake hole and crank it.
THANKS!
but I just picked up a 50cc GY6 for a song yesterday in overall good shape, but with a no-start condition.The last owner ran it from new to 11k miles, good maintenance, never dropped it, and was selling it because he got a new one when it was out of warranty and stopped having what sounded like a simple valve adjustment issue he wasn't inclined to know how to do. he'd already bolted on a new carb and starter hoping to fix the problem but I guess valves scared him.
Anyway, I got it home, took the head cover off (inside the valve cover everything's immaculate, good sign right?), and adjusted the valve gaps, put it together and still no start. Hmm.... Tried starting fluid with the carb off and I get a fairly heavy and continuous puff of what looks like partially burned air/fuel coming from the air filter box and when I kink off the crankcase vent it seems to build up a fair bit of pressure.
So anyone know if I'm in for a tear-down, or is there something else I've missed that might be easier? Is 11,000 miles getting close to dead on these motors even when it's been changed with AmSol and it looks like new inside?
PS: I won't be able to get a compression test done on it for a few days to be certain what the compression measures but it does draw what feels like fairly normal suction on my hand when I cover the intake hole and crank it.
THANKS!
making me have to roll the thing back the mile or so to the house. Guess that'll learn me not to ride too far from the house on scooters that can't be started without jumper cables.... 
