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Baja 70 wont idle

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I got a blown up baja from a friend for free the cylinder was okay i honed it out and it looked great new piston and head gasket. Cleaned the carb, new oil. It runs... but wont idle i can ride it around my backyard without issue but it will die when i let off the throttle ive cranked up the idle as high as it will go and ive played with just about every fuel setting but it wont work. I checked the plug and it is running a little bit rich to about perfect ratio. i replaced all gaskets and orings what could it be?

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First rule of Chinese engine, make sure the valves aren't tight.

Second rule of Chinese engine, don't be afraid to toss the stock carburetor. Decent replacements can be had for $25, really good ones can be had for under $50.

Since the engine was apart you should also double check the basics. Make sure compression is good, make sure cam timing is right.

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It has great compression if i take the slack out of the throttle cable it can idle really rough though. Then it has a terrible hanging throttle

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