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Dirt Bike Discussions By Brand
Yamaha MX & Off-Road Dirt Bikes
1978 Yamaha DT175
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[QUOTE="2strokerfun, post: 1105777, member: 69719"] That is a bad sound and a warning you are overheating and probably too lean. Your piston is getting too hot and it is a warning sign you are about to melt down. Sounds like you are running a little lean. What is your gas/oil mixture?? If you keep doing this, you will need to rebuild the top end because--even if you don't melt a hole in the piston--you are wearing it out and will have too much clearance. Check your float level and needle setting in the carb. This started happening to my Elsinore the other day. After it happening twice, I started to pull the carb off to adjust it and noticed no fuel came out of the gas line, even with the petcock turned on. Turned out my gas cap vent was clogged, starving the carb after riding about 25 minutes. Be sure and check the vent on your tank as it will cause your bike to start running lean and do this after a bit of riding. One other thing to check is for an air leak. The idling problems you noted may indicate a bad stator side seal, which will do exactly what you described. Again, the lean condition causing this can melt your piston. Do you have a little smoke, no smoke or a whole lot of smoke when you ride?? [/QUOTE]
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Dirt Bike Discussions By Brand
Yamaha MX & Off-Road Dirt Bikes
1978 Yamaha DT175
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