2004 predetor wont start? ideas?

[rockstar crf250r]

My friends just bought a 2004 predator 500 it started when he got it he said ran good and he wanted to start it up and show me but it didnt start battery is good it wants to go but just wont gas is on. not sure what else it could be......spark plug? any ideas? he wants me to take a look tomoorw just getting some ideas

 

[Twig]

Check spark and how about choke or is it EFI?

 

[rockstar crf250r]

yep tryed choke on and off and yes i was thinking the spark also

 

[munhoez]

Check for spark, check the compression(should b over 100psi for sure), check the fuel comin out of the tank. Its called the triangle of combustion, u must have all 3 for a motor to run good.

Maybe a carb job, drain the carb into a container and check the gas that came out, any water? fine dust?

Check the vent tubes from the carb, maybe pinched.

have u tried spittin a little gas into cyl and firing?

Whats the spark plug look like? all wet? fouled? correct plug? Dry?

 

[rockstar crf250r]

theres gas leaking out of the gas switch when u trun it from off to on or on to off

 

[psullivan]

probaly the valves need to be adjuted. when they get too far out of adjustment it makes for hard starting. check out polarispros dot com or polarisproriders dot com. Both sites have alot of predy oweners and they know their chit.

 

[crisscross1]

why not contact the original owner, he may have had this problem and knows how to fix it.

 

[psullivan]

why not contact the original owner, he may have had this problem and knows how to fix it.

Or do that but if he had this problem he has not fixed it if it is still doing it. The previous owner is probaly aware of the isue and didnt know what the problem was and that is why it was sold. start with adjusting you valves, it is somthing that should be done regularly anyway.