I think you should go down on the clip on the needle.
TRX 450 sputters and backfires when i get on the throttle... HELP
I have an '06 trx 450 ER. I took it out the other day and it ran fine for a couple of minutes, then it started to sputter and backfire out of the exhaust (shooting flames out of my HMF pipe) it feels like i lose a bunch of hp. So i replaced the spark plug, COMPLETELY took the carb apart and cleaned the sh*t out of it. I cleaned the air filter and its still doing the same thing. It starts up just fine and i can roll into the throttle and its not nearly as bad as when i hammer down on it. Can anyone help save my weekend of riding?!?!
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Make sure you have a real strong blue spark at the plug. A weak spark can make them act like that, sometimes.
Hey, I just thought of something else. Maybe your accelerator pump is bad.
if i went down on the needle it would only get worse. it started off on the bottom setting of the needle and it got better when i went up.
I was getting a strong spark. is the accelerator pump part of the carb?
I was getting a strong spark. is the accelerator pump part of the carb?
i just researched the accelerator pump. if it went bad, what part would haveto be replaced?
With these 450 motors you would be surprised how bad they will run being the tiniest bit out of spec.
If you want to send me your email address in a private message, I will send you the whole section on the fuel system from the repair manual, unless you already have a repair manual.
I was not thinking right! I thought if you moved the clip down it would hold the needle open more. Letting in more fuel.if i went down on the needle it would only get worse. it started off on the bottom setting of the needle and it got better when i went up.
I was getting a strong spark. is the accelerator pump part of the carb?
sounds like a bad batch of fuel. my bike did the same thing last week. I drained the gas and got some new stuff at a dif. gas station and it has'nt done it since. just thought I'd throw It up in the air.
i have already tried 2 tanks of gas. it seems too consistent to be bad fuel if that makes any sense.
my diaphram does have some rust on the steel part of it, the rubber seems in good condition
The accelerator pump would cause it to sputter but only for a min but then it should rev back up. I Had a dirtbike that didnt have a pump and if you would just throw it wide open it would sputter for a second then take off. :icon_question:my diaphram does have some rust on the steel part of it, the rubber seems in good condition
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