some1 help! 450 card problems.

[austinm400]

im working on my buddys 07 450. the carb was full of muk from siting for a year i clened it out and got the bike runing But it only runs on chock and brakes up bad when i give it throtle. what could be causing this problem and what can i do to fix it.

thanks.

[4reeds]

Did you drain the tank?

[DnB_racing]

clean air filter also.
if it has fresh gas and a clean air cleaner, then you need to rebuild carb with new seals and gaskets and clean again and blow out carb with an air nozzle

[MR4Engine202]

did you run a cleaner and probe through the jets??

[ss440ex]

If you have to use the chock to keep it running, it sounds like the pilot jet is plugged for sure.
I would only guess that the others are in the same condition.
Berrymans is some good carb cleaner....
I would start removing all the jets and clean them and all air passages.


Good luck.

[austinm400]

i had the carb apart and took out all the jets and hit them with 2+2 carb cleaner and compresed air and it still had the same problem. the second time i soked it in cleaner for a day and hit with the compresed air a second time and still no luck.

[4reeds]

Maybe try a fresh plug.Did you adjust the a/f screw? I would do a complete tune up,if you haven't already.Probably something simple being overlooked. Any air leaks around the intake and carb maybe?

[ss440ex]

When you remove and clean the jets, are you making sure they are clean?
Hold them up to a light and make sure the hole is clear.
main jet. slow jet, main jet holder, all air bleeds.
Float needle and seat also.

Keep us posted, good luck.