Question about Yamaha XJ 700 X Maxim Motorcycles

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My Yamaha XJ700X spews out white smoke when first starting. I just had the carbs done so I'm not sure what the reason is. Someone has told me that I might want to put in a little mystery oil into the gas tank. I want another opinion about that. What do you think?

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  • Ron Fredey Jul 15, 2009

    Thanks for the information. It is helpful.


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There are three types of smoke that will exhust from your gasoline engine: White smoke, actually is steam from condensation of water within the muffler and exhust system. Number two is Black smoke, this is from unburned fuel. The engine is running far richer that it needs to be. Number three is blue smoke. This is usually associated with oil comsumption. I hope this helps.
The white smoke deetermines that you probably have a leaky head gasket then while going up hill the moter and trans are under heavy load. the motor cant handle the heavy load because most of your compression is being lost threw the broken or cracked head gasket.if your oil looks like choclate milk you have problems. itmeans your coolant is going into your motor. also check to see if your coolant is foamy. do this by 1st removing your radiator cap then starting your bike.(careful not to get burned after warm up) if the antifreeze is foamy your oil is going into your coolant.
the head gasket needs to be checked first then replaced by confirming .

thanks.please do rate the solution.thank you for using fixya.keep updated.

Posted on Jul 15, 2009

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