HI to everybody, i am new here and i need some help with my Quadsport LT250S 1990.... When the engine is cold, everything is going fine, it's easy to start the atv and the power is very good. But when the engine is getting hot, i am unable to start it again.... and i am unable to speed it to... each time i press the gas the engine is doing huge noise from the pipe... like big backfire.... And it act like it would stop running....

I have a lot of thing that have been checked out on it: the carby have been cleaned and checked (everything seems to be fine on it). I did put new spark on it to: Same results. I asked a lot of people, but nobody had this problem in the past with an atv.... I am now at the point that i have open the cover for the dynamo.... everything ( from my eyes ) seems to be fine too. Compression is fine too....

I am really sick and tired to put some $$$$$ in it....

Any suggestions would be really appreciate.

An unlucky suzuki driver :-(

 

well, dont take me the wrong way, but its a 1990! i mean 15 year old quad is prety old, maybe u should look at buying a new quad, sell this one and whoever comes to look at it make sure its cold and start it and let them fall in love with it, then buy a brand new one, thats what i think.
The problem could be.. im stumped

 

Thanks for the advise, but at this moment the money is a mather of fact.... i want to have fun this summer at low cost.... I am looking to buy a new one but only next year....

Other suggestions from anybody??

 

The air filter in good shape and CLEAN? When's the last time it was replaced? Motor ever been opened, tinkered with? Are the carb set screws adjusted correctly? Anything not stock?

 

Tought i had found the problem (magneto in oil) but someone did told it is normal :-(

Damn i am kinda out of this ATV!!!!!

 

The problem is probably your CDI. I've had several quadsport 230's and two of them had bad CDI's and ran exactly like you describe yours, except that mine would randomly run good and bad, not just when it was hot or cold. When it was running bad, the header pipe would get really hot and the exhaust was really loud. It was also hard to start then. Then all of a sudden while riding it, it would "kick in" and start running good again with a lot more power. After tearing into the motor and doing a rebuild (probably unecessary), I finally tried a different CDI and presto! It ran good all the time.

 

Thank you.... i will try this..... LAST TRY ON THAT ONE!!

MANY MANY THANKS AND I WILL LET YOU KNOW IF IT WORKS!!!!!

 

where in quebec do you live? and did you fix your bike?

 

I leave in Lac-St-Jean, and no i didn't fix the atv yet cause i am unable to find a used CDI unit and a brand new cost 400$$$$....

 

Just detail it and sell it, then finance a new LT250 Ozark for another 15 years. What is it $39 a month? At 15 years old and who knows how many hours its have lived 3 life times of an non-brand. You only have fun while you are alive and in good health, so go out their and finds a new or used new Ozark have fun.