Knowpig
12-21-2006, 09:28 PM
I built a 426EX for a good friend. He's in Glamis even as we speak.
He called me yesterday saying the 426 is running great, his 14yr old son just beat a Banshee up Olds on it (Just go with it, I was nice, you can be too.) but after the 'race' it was making a puffing sound from the engine. He asked what it could be. I tried to stay calm and went through everything in my head real quick. Then I started thinking, what did i NOT do on the motor. He installed the exhaust, intake, plug, etc.........."hey, is the spark plug loose?". And yes, it was. The spark plug had backed out a bit and was indeed loose enough to let by an audible puff at idle. I would like to include that this build did get a brand new head. He has installed another new plug, but it also keeps coming loose while riding. I have not yet laid eyes on the quad, but he said the plug went in nice and the threads in the head and on the old plug seem fine. It's not blowing the plug out, just backing off a bit and getting loose.
Has anyone had this happen?????
What advice can I offer him? (or you to me!)
:confused:
He called me yesterday saying the 426 is running great, his 14yr old son just beat a Banshee up Olds on it (Just go with it, I was nice, you can be too.) but after the 'race' it was making a puffing sound from the engine. He asked what it could be. I tried to stay calm and went through everything in my head real quick. Then I started thinking, what did i NOT do on the motor. He installed the exhaust, intake, plug, etc.........."hey, is the spark plug loose?". And yes, it was. The spark plug had backed out a bit and was indeed loose enough to let by an audible puff at idle. I would like to include that this build did get a brand new head. He has installed another new plug, but it also keeps coming loose while riding. I have not yet laid eyes on the quad, but he said the plug went in nice and the threads in the head and on the old plug seem fine. It's not blowing the plug out, just backing off a bit and getting loose.
Has anyone had this happen?????
What advice can I offer him? (or you to me!)
:confused: