ATC 110 has pressure in crank case after a 20 minute ride. How?
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I just got an ATC 110 for my kid. It runs really well for it's age. The previous owner said he replaced one of the crankcase halves because the old one had a leak in it. He honed out the cylinder and put on new rings. It has pretty good compression. I've noticed after about 20 minutes of riding if you take the dipstick out, a rush of air blows out. I don't remember this happening on my old ones I had as a kid. I also noticed that if you have the dipstick loose in the hole, it will pop up when you pull the starter rope. Normally I would think it is blowing by the piston and putting pressure into the crank case, but the compression is pretty good. Is there any way to remedy this problem? And what is causing it?
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08-09-2015 01:49 PM
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