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Offroad => MXU => Topic started by: Rpm90001 on March 10, 2015, 10:14:59 PM

Title: Mxu150 will not take any throttle till fully warm.
Post by: Rpm90001 on March 10, 2015, 10:14:59 PM

Hey guys, first post here for me.   I bought my son a showroom condition 2008 (I think) mxu150 with 120 miles on it.  Bought from close friend who bought it new. 

I have a problem that he said it alwasy had.   I can start it fine, but it will not take any throttle till fully warmed up.  I have to let it idle for 8-10 minutes before I can give it throttle.   Fully warm its total fine.

Anyone else with this issue?  Ideas?  My garage is heated about 65 deg, I don't think I should have to let it warm up more than a minute befor riding.      Thanks for any help,

Geo

Title: Re: Mxu150 will not take any throttle till fully warm.
Post by: Alligato on March 11, 2015, 02:04:40 AM

How's the plug look?

Title: Re: Mxu150 will not take any throttle till fully warm.
Post by: BettinANDlosing on March 11, 2015, 04:50:11 AM

Clean the carb and you'll be golden

Title: Re: Mxu150 will not take any throttle till fully warm.
Post by: Rpm90001 on March 11, 2015, 08:47:53 AM

Plug looks new, but I will replace it.  If carb was dirty, why would it run perfect warm? 

Thanks,
Geo

Title: Re: Mxu150 will not take any throttle till fully warm.
Post by: BettinANDlosing on March 11, 2015, 03:03:43 PM

The idle jet is plugged, once it's warm it doesn't need as much fuel and runs ok. 99.9% of the time dying when giving out throttle is plugged idle jet.

Title: Re: Mxu150 will not take any throttle till fully warm.
Post by: Rpm90001 on March 12, 2015, 12:12:58 AM

Swapped out the plug, issue is 95% gone.  Slight stumble for e first 2 minutes then all is good.  Old plug looked good..  Gas is a year old, (didn't knowthat till this evening). Will drain and fill with fresh tomorrow.   Not a bad little machine.  Thanks for help!   G