400EX No Start
#11
Well ever since around November or December I have not been able to start my beloved 400 http://forums.atvconnection.com/hond...estions-8.html.
At first I thought it was just being cold blooded, but I realize now that is not the case. Before spring gets here I would like to make sure it is up and running. It cranks over just fine, gets fuel, gets blue spark, has compression (135psi), I pulled the head and checked the cam timing is spot on. The only thing is will do is backfire once in a GREAT while. When it does it is like a cannon fire. Shot ether at it and no change. The only thing I have noticed is that it seems that it sparks like 4-6 times per stroke. Could the stator have went bad maybe?
Any thoughts?
PLEASE HELP!!!
At first I thought it was just being cold blooded, but I realize now that is not the case. Before spring gets here I would like to make sure it is up and running. It cranks over just fine, gets fuel, gets blue spark, has compression (135psi), I pulled the head and checked the cam timing is spot on. The only thing is will do is backfire once in a GREAT while. When it does it is like a cannon fire. Shot ether at it and no change. The only thing I have noticed is that it seems that it sparks like 4-6 times per stroke. Could the stator have went bad maybe?
Any thoughts?
PLEASE HELP!!!
#12
Further investigation showed this. I was wrong. Not enough wind.
So........... moved on to this.
Only thing I found wrong though was that the top ring was stuck in the piston. Not free moving. So going to file out the ring groove a bit and put it back together. New gasket set on order. Hopefully that takes care of it.
So........... moved on to this.
Only thing I found wrong though was that the top ring was stuck in the piston. Not free moving. So going to file out the ring groove a bit and put it back together. New gasket set on order. Hopefully that takes care of it.
#14
Ouch.
Yeah I probably wouldn't have filed the block by myself. O'rielly Auto Parts and NAPA both have sprays that are designed for freeing stuck pistons. For the time being, consider running an oil treatments such as Lucas. Possibly something a tad bit thinner.
#15
#17
No bent valves. All looks good.
I lapped the valves and through it back together last night. Fired right up and runs like a champ. Took it for a short drive last night and all seems good. Still want to throw a compression gauge on it again and see where its at.
Talking to my neighbor buddy that builds drag cars, he seems to think that it could be just that cold blooded because of the setup I have (not the first person to tell me that either). I am not sure I believe him, but it does make sense that during the winter the only time I had it close to starting I had a heater in front of it for 20 minutes. I don't know.
Maybe next winter I will just block it up in the garage for the season.
I lapped the valves and through it back together last night. Fired right up and runs like a champ. Took it for a short drive last night and all seems good. Still want to throw a compression gauge on it again and see where its at.
Talking to my neighbor buddy that builds drag cars, he seems to think that it could be just that cold blooded because of the setup I have (not the first person to tell me that either). I am not sure I believe him, but it does make sense that during the winter the only time I had it close to starting I had a heater in front of it for 20 minutes. I don't know.
Maybe next winter I will just block it up in the garage for the season.
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