CN250 GY6 250 CC Honda Helix Clone ZNEN TITAN Wont Start
by: scooterfan86 - Dec 4, 2014 21:36:03 GMT -6
Post by scooterfan86 on Dec 4, 2014 21:36:03 GMT -6
Hi there, first off thanks for all the information on these threads.. it's helped me a lot in taking apart my bike.
So I had a stalling issue and eventually a starting issue with my 250cc scooter. It turned out to have a broken exhaust spring that I replaced and put everything back together. The engine ran a little bumpy at first but over the course of a few days things ran smoother and smoother. I took it for longer and longer test drives, eventually on the highway, and a little bit more than a week later ran into problems again. Started everything up, drove to pick a friend up. Everything ran fine. Got to me friends; they were getting ready and I was sitting in the parking lot for about 10 minutes. The idle was lower than usual when I noticed it, around 1000 rpm but still running without any sputters. Then the engine just stopped. No pops, no bangs, just off. Tried to start it up, it sputtered a bit but would not start.
So this week I got it home, took the engine back down to the head gasket which I hadn't replaced yet (figured this was a good time to do that). I also replaced a cam chain guide that was warped. Put everything back together, getting compression, getting spark. When I pull the spark plug it smells like fresh gas. But no start. I've looked around for a hose or something that worked its way off, but so far nothing has shown up.
When I had the bike opened up a couple weeks ago, I went through the carb with everything in good working order. The spark is yellowish but I can't see this as a reason for a spontaneous shut-down and no-start.
I really don't know what to do or what else to check. The timing should be right.. top dead center, lined up the marks, reinstalled the chain with the cam lobes down and the markings lined up. It's something I can check again without much trouble.. but it wouldn't have caused a spontaneous shutdown either :/ Anyone have ideas of what I should check next?
So I had a stalling issue and eventually a starting issue with my 250cc scooter. It turned out to have a broken exhaust spring that I replaced and put everything back together. The engine ran a little bumpy at first but over the course of a few days things ran smoother and smoother. I took it for longer and longer test drives, eventually on the highway, and a little bit more than a week later ran into problems again. Started everything up, drove to pick a friend up. Everything ran fine. Got to me friends; they were getting ready and I was sitting in the parking lot for about 10 minutes. The idle was lower than usual when I noticed it, around 1000 rpm but still running without any sputters. Then the engine just stopped. No pops, no bangs, just off. Tried to start it up, it sputtered a bit but would not start.
So this week I got it home, took the engine back down to the head gasket which I hadn't replaced yet (figured this was a good time to do that). I also replaced a cam chain guide that was warped. Put everything back together, getting compression, getting spark. When I pull the spark plug it smells like fresh gas. But no start. I've looked around for a hose or something that worked its way off, but so far nothing has shown up.
When I had the bike opened up a couple weeks ago, I went through the carb with everything in good working order. The spark is yellowish but I can't see this as a reason for a spontaneous shut-down and no-start.
I really don't know what to do or what else to check. The timing should be right.. top dead center, lined up the marks, reinstalled the chain with the cam lobes down and the markings lined up. It's something I can check again without much trouble.. but it wouldn't have caused a spontaneous shutdown either :/ Anyone have ideas of what I should check next?
