my 450r problem(please help)

[Stealth450r]

my engine is all stock. when ever i hit a bump are whoops, my qaud looses all power until i let off the throttle. i cleaned the carb and change the oils,oil filter,spark plug,and air filter. i dont know whats wrong so can someone help me.

thanks,
george

[Colby@C&DRacing]

did you just get the pc done if so check for bad grounds

[Stealth450r]

thanks,
i will try that 2morrow do you know where the ground is

[Punk'd]

Look at the filter n make sure it can breath n there is not to much oil on it also...

or make sure your vent tube on your gas cap isnt pinched

[WhiteZee]

you tore your quad down and you dont know where your ground is???

[Jersey450R]

did u take the snorkel off the airbox? i tried that and i couldnt get past 1/2 throttle.

[Stealth450r]

whitezee- my dad tore my quad apart to get powder coated. know he thinks i broke it so he wont help me.

jersey450r- no i didnt take it off, i never touched the motor in any way.

[WhiteZee]

Originally posted by Stealth450r
whitezee- my dad tore my quad apart to get powder coated. know he thinks i broke it so he wont help me.

wow, you may want to talk to him about that, i couldnt see how he would be pissed over you "breaking" it anyway.

[Stealth450r]

yea icheck the ground its fine, then i opened the float bowl and found some dirt so i cleaned it out. now if i go throught the whoops 10 times it will only 2 or 3 times. what else do i cleaned on the carb. should i take off the top and clean that.

[RAFFERTY1]

my brother had the same problem on his when he first got it.
whenever you went over a jump the engine would lose power and if you tried to rev the bike it would just pop and bang if you left it to idle for a minute it would be fine (until the next jump) very frustrating in an mx!!
we tried everything and eventually foun it was down to a faulty throttle position sensor.
hope this helps good luck.

[Stealth450r]

ok thanks did you just replace it. where is this located on the carb.

[WhiteZee]

sounds like you need to buy a servise manual.

[JR3]

yea weve tryed everything with his quad still bogs prolly jus sumtiin stupid that the dealerships gonna rape him for if he brings it their