Need help!

[Fuxitall]

Ok so I bought a blaster a few weeks ago and basically have redone all of the bearing and put a new axle carrier rear hubs all the a arm bushings, so I was riding it yesterday I was ripping through the gears and once I got to 6th wide open for about 5 seconds it fell flat on its face so I let off and tried giving it has again and anything over half it bogged down but when I let off it would rev just fine and if I pulled the clutch in it would stick wide open on me? Can anyone help to what it is that's going on is it a carb issue?

 

[nick20555]

Is it only in 6th gear WOT that it falls on its face, what about 5th and lower? In 6th gear, it has its highest load applied to the motor so it might help to know if its bogging or the power isn't all there in 5th gear as well but you just notice it more in 6th because that's where the biggest load is on the motor.

 

[Fuxitall]

If I down shift to 5th after its bogged down in 6th it'll do the same thing I can't give it more then half throttle or it just bogs down, 1-4 seem alright.. Like if I'm in the woods I'm fine it has great response and rips but if I try and go on a road and hit 6th wide open it bogs

 

[nick20555]

I'm thinking that its probably something in your jetting (needle covers about 1/4-3/4 throttle, main covers 3/4-WOT) and you are seeing it in 5th and 6th because of what I said earlier, its straining the motor more. As I am not a jetting expert like some on here (actually having jetting issues of my own at the moment), it would be helpful for you to list your jetting along with mods to the quad, temperature, and elevation.

 

[Fuxitall]

I would have to go out and find out the jet size and all that and from what I am told (but not sure I believe the kid I bought it from since he seemed kinda stupid) it's bored .40 over it has a fmf slip on silencer and there's no air box lid( nor do I have one) other than that I really don't know

 

[Fuxitall]

But my elevation is 958ft and temps is low 60s to mid 70s I'll get the jet size when I get outside to work on it

 

[Larry's Shee]

So you're saying stock pipe, FMF silencer? Stock air filter , K&N , or foam filter? Pre mix or oil injection?

 

[Fuxitall]

It's premix gas and yes it's a stock expansion pipe with a fmf silencer, it has a foam filter not sure of brand

 

[Awk08]

this could be a number of things, the most important and most damaging is too lean from a stock jet with open airbox and mix, or an airleak.

it could also be electrical, those gremlins sometimes like to show only at high loads.
check all connections, plug wire and connection to plug up inside boot, disconnect both switches one at a time if you have both to rule them out, and the black wire ground at the coil.

i'd be checking compression to see if you did any damage, a leakdown test, increase main jet to 240/250 for the open airbox and mixed fuel
start big and plug chop to confirm them

 

[Fuxitall]

Ok I looked at it a little and the boot from the carb to the air box wasn't on the carb all the way, and it doesn't want to stay on there, and there was also a bunch of fuel in the boot too

 

[Awk08]

for the airbox boot to stay on it should be hooked with the rubber loop to the pin sticking off the frame, located on top of boot a few inches behind the carb.
this also helps support the weight of the carb to prevent the intake boot in front from bearing the weight and possibly cracking.

fuel in the boot points to cracked/chipped, broken, not laying flat reed petals.
remove the carb and look in at the reed petals with a flashlight, all 4 should be laying flat and fully intact.

 

[Fuxitall]

Ok thanx bud I'll give her a try n let u know