Runnin rich? no swag

M

Motorx100

New Member
Oct 12, 2011
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hey so its my i just bought my first blaster... got it around 2 weeks ago..

worked fine on first tank of gas.. (the tank that i bought it with aka owner filled it) rode it great..

so i run out of premix

i make my first premix at 32:1 .... make 5 gals and throw it in the tank..& bam it sputters at 3/4 throttle & boggs out at wot.. still runs though and idle's & starts first/ second kick

so i run though that tank and then make another.. same problem but this time its worse. so i check the plug... things black as hell.. ok i change the plug nice and new..

ohh yaa and by the way this is already the 3rd tank I mix at 32:1 and the problem seems to be getting worse..

soo go out and ride it and it just booggggggs out until it just shuts off. push the thing back to my place to take out the plug... things wet with oil..

im defiantly running rich but i don't think its a jetting problem because it was literally working fine before around a week ago and i got no new mods.. dint even touch the dam thing... very strange

i feel as if maby i made the premix wrong but i put 20 fl ounces for 5 gal of gas.. that is 32:1 ratio soooo... i dont know... went to my local yamaha dealer n he told me to ride at 40:1 and see.

i dont know what to do and the problem seems to be getting worse.. as if i keep putting more and more oil in the mix. before it started first kick.. now it take 20-30 kicks with the spark out..and filter off just to start her.. mad smoke too..

whats my deal??? please help me i wana ride!!!
 
Worth a try to try and run 40:1, It cant hurt anything and some oils do better at that ratio . You could be running to large of jetting as well but i would try 40:1 and see.
 
ya the kid i got it from said he always ran it 32:1

oh and by the way.. i saw today in the very front of the exhaust pipe oil drips/ sprays out of the gap between the pipe and the inlet to the engine. it is also missing the spring that holds it tight and if i bang it in it moves inn but when i rev it it just moves back out again.. im not sure if this has to do with any air leaks?
 
They all leak oil there but yes you need a spring. If the previous owner ran 32:1 i sure would give it a try and get a spring to fix that pipe. Of course everyone will recommend you do a leak down test to insure theres no AIR leaks not exhaust leaks and you might want to, to have peace of mind and not blow it up for a bad seal or something.
 
get a new exhaust spring at most any hardware store
slide your pipe in, measure the distance between spring attachment points and get one a 1/2 - 1" shorter

possibly a bad batch of gas ????
drain all thats in there now
get different fuel at a different gas station, 92/93 octane preferably
i like 93 octane sunoco
and retry the 32:1 mix first

what oil you running ????

also possible the floats may be stuck, or got whacked out of adjustment ???
notice any fuel leakin outta the carb overflow ???

also possible sumthin came loose in the carb...pilot jet or needle ???
gonna need to pull that carb and have a look if a fuel change doesnt help
double check the airscrew is at 1 1/2 turns out

i'd give inside the plug boot a good hard look too, i've seen 3 bad plug boots cause mad headaches searching for carb/jetting problems
 
ya i already took apart the carb and is was clean as a whistle nothing was loose inside.. im running 92 oct from mobile and i have already tried 93 before too.. float was intact and at the correct hight. i do realize that when i kick it and give it a bit it does leak fuel from the overflow but i believe thats normal when starting..
today i kicked it after not riding for 10 days. started on the 5th klck but i had to give it a bit of gas for it to start.. i put it in gear and tried to take off slowly but the second the clutch slowly engaged it just shut off in a second. no time to even react to try and keep it going. just shut off.
 
fuel out the overflows is never normal, but you claim float height is correct
and are you using the choke to start it ???

i'd check electrical, those demons luv to rear their head under a load
plug boot and wire, and ground connection at the coil

airfilter clean ???

clogged pipe ????
pull it off the cylinder and see how it runs for just a very short ride
found a mouse nest in my buddies recent build,
and had the cast iron baffle inside the stock pipe break loose once, caused me jetting problems for a month or so, stood the bike up for some reason and heard a clunking in the pipe, new pipe cured that
 
This may be a stupid question, but since you're new here I'll just throw it out there......

You say you're pre-mixing 32:1, so this implies the stock oiling system is disabled.......correct?


Is your TORS disabled? If not, check the DIY section of this forum for how to disconnect.


Is your parking brake diabled?

Both the TORS and the parking brake are know sources of electrical anomolies, so be sure both are disabled.
 
@awk08

i did choke it

the filter is kinda dirty but the problem still continues even with the filter off.

and the pipe looks new and is aftermarket..

& remember that the bike worked great 2 weeks ago.. thats y i feel like the problem is much simpler than we all think. i think i'm just going to try 40:1 and will see from there...

is it possible that if you were to run rich for so long that the bike eventually get so much un-burned oil in the case that it becomes worse and worse the more you ride rich. eventually causing the problem i have now?? seems possible

@piezzi

no that is a good question and i checked that earlier today before making the thread.. but ya i dont have a parking break.. & about the TORS i gota check but the quad is very modded so i wouldn't be surprised..

isint there supposed to be a place under the seat to put the oil... the only thing i see under mine is a cap for break fluid. and an empty space for like storage.. i got a tie down inn there haha
 
clean the filter, re-oil with foam filter oil, or k&n oil if needed
try new fuel mixed 32:1
and check that plug boot
and give the reeds a look
 
The oil injection tank would be by the grab bar, to the left of it. It does seem like you're running rich.

Check for the oil injection- See if it's hooked in or not.

If you start it and while not riding, just open it up completely, WOT, you could possibly burn the oil off the plug. Some 125 dirt bikes need that... Obviously don't hold it open for minutes tho, just a little bit. Then see how it runs.

Depending on whether or not the oil injection is hooked up, I say try 40:1.
 
changing the mix ratio is like putting make-up on an ugly biotch,
theres a problem somewhere
 
alright so i haven't got to putting in a new tank of gas in yet.. but i started it up again today on the first kick. i let it idle for about 5 min and realized a puddle of gas on the floor coming from the overflow tubes... when i revved it.. it would rev up to about quarter throttle and it just quickly cut out as if the gas flow was shut off... by half throttle the reves have already gone down and if i hold it down any longer she shuts off.. maby float??
 
check for a cracked float, pull them out of the carb and submerge in a clear cup of fuel and look for bubbles

and recheck the float height, 20-21.5mm
with gasket removed, like this............
4785-float-height.jpg



recheck the float needle for tears on the rubber tip

oh...and you do have the brass washer under the main jet ??
and the plastic splash gaurd on it too ????
 
reeds were cracked no good and i got a new air filter... now she runs fine.. thanks for the help guys
 
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