Runing probs

[gytrapex]

my buddy has a 06 Yamaha apex gt he washed under the track and that's it and he want to start it up I was back fireing and was not run right it was not runing on all 4 then it started runing lil better but still back fire some times when he hit the gas what could it be

 

[spr5088]

Could be many things .. Maybe bad gas..?

 

[YammyRX1]

Check the exhaust and donuts for leaks (rag test) and maybe the plugs. Before the wash did he run it and shut it down without warming it up completely because that can foul plugs.

 

[maim]

Spr5088 and yammyrx1 are both on the right track. I would try what they suggested 1st and see if that clears it up.

 

[gytrapex]

No he did not start it up be for the wash he did after the wash when he first started it was not running right at all he just let it site there and run it started picking back up u could hear it it started running better but when he hit the gas it took of with no prob but when he did it agin it back fired

 

[maim]

sounds like bad gas to me just from the symptoms. drain it as much as possible and fill it up with fresh 91 octane with a dose of sea foam. should remove the condensation from the tank that is causing the problem. part of why i store my sleds full of gas in the off season.

 

[thor452]

it could just be because it is warm out. mine will run rough for the first 30 sec to a min in the summer months and then it catches and runs smooth not a prob if it catches and runs smooth afte a little while.be sure you run it for 10-15 mins untill running boards(both) are quite warm to the touch as to not foul it up when starting in the off season. the machine is designed to run when it is cold so a little studder opon start up in warm weather is no concern as long as it smoths out.