300ex bogging/stalling on uphills

[tolson]

:eek2: my 300ex w/ no mods but a white bros e-series pipe and k&n filter is bogging out/ stalling on the uphills. runs fine on the flats and downhills. any ideas.

[countypark]

You might have water in your gas tank. When you go up a hill or pop wheelies the water will run to the back of the tank where the pick-up is. That will stall you out once it hits the plug.

[QuAdEr 317]

you also might be in to high of a gear and goin slow....also countypark could be right:macho

[tolson]

i was thinking of the tank pick-up water deal but i did drain the tank and the carb before the race. i've asked tons of people, some say the float in the carb, water, clogged hoses, re-jetting?
i was hoping someone would say here is the answer it happend to me. but no. off comes the tank and carb.

[MotoXdevil7472]

did u rejet for the pipe and filter? if not, that could be ur problem

[tolson]

i did not because it ran really good for 4 races. no problems. but now it's also bogging a little in other spots, but i thought it was a problem related to the bogging/stalling up hill.

[miken]

If it ran good for 4 races and now its bogging check the simple stuff. Even though it ran fine your jetting was not really dialed in, maybe your plug loaded up, or has been running hot, clean or replace. Check grounds, wires, sounds electrical to me.
Mike -

[ex kid]

tim, call White Brothers and get the jetting specs from them.

didn't you just put the KN filter on? if you did that could be your problem as to why it just started running like crap.


check the plug color and i would raise the main jet for starters.

[ex kid]

tim, call White Brothers and get the jetting specs from them.

didn't you just put the KN filter on? if you did that could be your problem as to why it just started running like crap.


check the plug color and i would raise the main jet for starters.


BTW it's Papa. how did you finish sunday?

[miken]

I reread your first post. Adding the K&N and new exhaust really increased the breathing capabilities of your motor. I'm very surprised you did not have to rejet. You are running lean and need to increase the fuel (I think). Check your plug its probably overheated (white). Is your header glowing red? Adding air is like turning up the 02 on a torch.
Mike -

[M300ex03]

tolson - are you the kid with the yellow 300ex at the hurican hills race/Dutchman

[tolson]

yep, who are you? i raced at Foot last weekend and the dame thing ran like piss. i just took the carb off and it has alittle dirt, but nothing major. i also just got a 125 main jet and i'm going to try that. no race this weekend?

[ex kid]

the only D6 race this wekend is at Valley Forge but it's dirtbikes only. i might take my brothers up and check it out.

Rausch GNCC is next weekend u going tim?

[M300ex03]

at hurican hills i was a few down red 300ex with fmf graphics we were the only too with 300 were in nj are you?

[tolson]

how did you do at hurricane M300ex03? nice to know there is another 300 in the house. we have to team up on those blasters. i live in washington nj, warren county, 20 minutes from the delaware water gap.

yo ex kid-
no rausch for me propbably. i'm going to watch but i might just hang out and relax.

[M300ex03]

i live in readington nj about 40 min from you. go upto the gncc i will be there racing with my ohter 300ex friend he was at d man look for a long trailor with one red rail lol my paint job

[M300ex03]

and i got 5 th that was a great race you wouldent happen to know of the paulskill viaduct that is right up there i am going suday it some weird bridge some kid fell of it last week so they are going to close it down so we are going up to check it ouy one last time and have u raced the jack frost track

[red03400]

the gas might be shifting to one side of the tank..check it out and let me no

[tolson]

i have not racing jack frost yet. heard it is rocky. don't know about the bridge.

[tolson]

i don't know if it is a gas tank thing or what. i'm re-jetting tonight and goin to see what happens.

[tolson]

i rejetting with a 125 main jet and cleaning the carb and everything out and it seems to be fine. just a note, my spark plug was not tight? that might have been a problem as well.:rolleyes:

[ex kid]

don't just ride it down the street. get it in the dirt so if the float level is off you will know when it starts bouncin all around.

[tolson]

after cleaning to whole carb everything seems good. how do you adjust the float level?