mxu 250 engine cutting out

[fred pierce]

my 2005 mxu 250 cuts out when i  try to rev the engine.
any body got any ideas of hat could be the cause

[zombie]

Details.... When did it start? When was the bike last serviced? How did it start?
How many miles on the bike? Original owner?
What are you wearing?

[fred pierce]

Thanks for coming back to me
The quad has covered 3800 Klms and needs a service oil change etc the problem started when I was riding it just cut out . The quad starts and runs but when applying gas it cuts out
Yours faithfully
Fred

[zombie]

I would pull the top off the carb, and check that rubber diaphragm for tears Next I would pull off the float bowl, and look for dirt/anything up in the main jet.

Also pull off the vacuum line that goes to the fuel petcock. Suck on the end of the line, and you should have a steady stream of fuel out of the tank.

Could be as simple as a bad spark plug but I think the above stuff may get it.

[fred pierce]

Hi thanks for the info
Will take your advise and look at what you suggested many thanks
Fred

[zombie]

No trouble. Please keep us posted on what you find.

[bism45]

i have exactly the same problem on mine (same year) but i have 4 x mxu's and only this prob on one, i have cleaned the carb and they have quite new plugs, will def try the other ideas out though....cheers ;0
P.S YOU DIDN'T ANSWER WHAT YOU WERE WEARING LOL

[zombie]

No one ever does... Sigh

[m2yuout]

Similar issues here..... did you guys find the route cause??

Cheers

[Bratman2]

Last time I had this problem, grandson's Mongoose 90, the nearly new NGK plug was bad. Plugs are pretty cheap and fairly easy to change. I would do that first. Second I would tear into the carb if the plug doesn't fix it.