mukini tuning (video)

as soon as i give it any throttle it dies.

run fine woth a 160 but was rich, same with a 150, then this started last night and i just put the 140 in

20mm mukini carb with 140 main jet and needle at the richest setting. Did the same thing with a 150 jet in the middle needle setting. Anyone have any ideas on what is wrong?

Re: mukini tuning (video)

why do u say it was too rich with the 160? mikuni carbs die on throttle when its too lean, so presumably u have down jetted into being too lean.

Re: mukini tuning (video)

I would have tried every single jet/needle setting before asking any questions. If you tried every single setting it's not the carb. Mikuni carbs will start lean or rich doesn't matter. I ran a vm20 on a 105 jet for about 10 ft but it started and ran just fine, switched to a 140 jet and it went faster and now I am running a 160main jet full rich, my shit rides out and starts every time.

Re: mukini tuning (video)

i had black and wet plugs at 160 and 150 it was still black. when i rode wide open and let off and got back on it, it would stumble. I assumed that that was flooding because of the fuel being drawn in with not enough air.

the thing that is weird, it ran with a 150 just fine, and then last night it ran for a block and then died. i started it back up, but as soon as i give it throttle it dies. today i started it up with the 130 in and it did the same thing... went one block and died at the next red light

Re: mukini tuning (video)

starts with my hand over it but not the choke... it lean?

Re: mukini tuning (video)

How does it feel when it runs? Your problems don't sound carb related. I had the same issues once with my wiring, so I cut all of it out and only run one wire. The ignition coil in my stator started to go out and when the ped heated up it just wouldn't start, pretty weird the way it happened. You should also take the carb apart and inspect it, if nothing looks wrong put it back together and run it again. Check the main jet and idle jet to see if anything is stopping the fuel. Also take the air filter off and check to see if your slide is set the right way ie:full open and closed slide.

Re: mukini tuning (video)

it ran strong. then you close the throttle and even if you open it up it dies. it first cut out only when you were blasting, coasted, then tried to get back on it. not it cuts out as soon as you give it throttle.

what would happen if i get tranny fluid on my stator plate? i have a part of my side case removed so i can run a 27 tooth front, and a decent tranny leak.

Re: mukini tuning (video)

You should be able to run the 27t with the side cover. I run a 27t front and have not one issue with the chain or side cover fitting. You also should check your float bowl wrist pin thing(the pin that lets the bowl pivot).

You said something about your trans fluid getting on your stator, take the flywheel off and inspect everything. I have heard of people having issues with trans/oil getting on the stator and not letting it ground or something.

Re: mukini tuning (video)

well i couldnt run a 27 without taking some out material, so i did.

ill check my stator and all that tomorrow, where exactly should i look?

this wouldnt be effeced by the fact that i dont have a ground running from my voltage regulator to the frame would it? has to be tranny fluid.

Re: mukini tuning (video)

so today i go to start it to see if it is better and it doesnt start at all unless i put my hand over the mouth of the carb. (sign of being to lean)

i then check the brand new plug i put in about 5 kicks prior and the plug is wet. (sign of being to rich)

i checked: my float, my main jet, my reeds. something has to be fucked up with my carb nothing else seems messed up. right?

Re: mukini tuning (video)

I might be pulling off your head and cylinder to take a look at your rings and such..just a thought...

Re: mukini tuning (video)

dont pull off my head! :P

i will now that you said that.

arent head gaskets one time use?

Re: mukini tuning (video)

it sounds like you have an airleak... try useing some RTV sealant where the carb meets the intake and the intake to the cylinder...

Re: mukini tuning (video)

cylinder and head looked fine

everything is gasketed and tight

Re: mukini tuning (video)

Стев Браун /

I'm trying to read into these statements you made about going one block and then dying...

That sort of sounds like you're depleting just the gas in the bowl and it's not being replenished. Maybe a vacuum issue? Bubbles in the line? Try running a straight fuel line with no fuel filter (if you aren't already).

Re: mukini tuning (video)

i just got back from buying clear fuel line.

no fuel filter used, float was checked and not stuck i really dont know :(

Re: mukini tuning (video)

have you tried removing those red excess over flow lines you have on there ?

Re: mukini tuning (video)

also will it run w/ the 160 in it now?

Re: mukini tuning (video)

dont have the 160 with me... its a fuel delivery issue

ill just have too top off before every ride and carry gas with me

Re: mukini tuning (video)

get a new COCK man!

Re: mukini tuning (video)

King Drunky JCams /

Does the fuel flow well (a thick stream) from the fuel valve?

If it's just a trickle then there is your problem...

Re: mukini tuning (video)

no, i got it all understood now.

i just needed more gas to push the fuel through the line to the floatbowl.

im running a 180 on the richest setting now though and it is running good... never thought that with the shit that i was seeing that i would need a richer jet.

Re: mukini tuning (video)

Fatty Buster Bloodvessel /

Welcome to my world...shaw

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