250r running rich (video) and a couple stills of all 3 bikes

[threewheelin-feelin]

the difference in our bikes is mine smokes like its rich and the plug is black when i pull it out...you said yours showed lean

[SteveCZ28]

well then i would look at the float valve. maybe yours is sticking and flooding the bike out

[82 250r]

mine smokes like its rich and the plug is black when i pull it out...you said yours showed lean

In general terms, not referring to your bike,
If a motor is really lean, it can't burn the mixture and causes a miss. The miss will will cause smoke, foul plugs, and your pipes to ooze black goop.
This is what makes jetting so fun. Many of the symptoms are the same so we need to look for other clues.

Now in regards to your bike, it appears rich (smoke, foul plugs) but it won't idle down which is a lean. That may be caused by a leak...maybe not. It may be caused by a plugged pilot jet or any number of things.

I feel you may have multiple issues... none of which have to do with premix ratios, or carburetor (even though a flatslide would perform better).
That is alot of smoke...check for head gasket issues or a vacuum leak. A head gasket is $25...may be worth a look.

Marc

[threewheelin-feelin]

In general terms, not referring to your bike,
If a motor is really lean, it can't burn the mixture and causes a miss. The miss will will cause smoke, foul plugs, and your pipes to ooze black goop.
This is what makes jetting so fun. Many of the symptoms are the same so we need to look for other clues.

Now in regards to your bike, it appears rich (smoke, foul plugs) but it won't idle down which is a lean. That may be caused by a leak...maybe not. It may be caused by a plugged pilot jet or any number of things.



I feel you may have multiple issues... none of which have to do with premix ratios, or carburetor (even though a flatslide would perform better).
That is alot of smoke...check for head gasket issues or a vacuum leak. A head gasket is $15...may be worth a look.

Marc

ok we might be on to something now...i just noticed it is putting out some black ooze..but it doesnt seem to have a miss at all...however i just replaced the head gasket about 4 months ago it was leaking coolant out the side

[threewheelin-feelin]

In general terms, not referring to your bike,
If a motor is really lean, it can't burn the mixture and causes a miss. The miss will will cause smoke, foul plugs, and your pipes to ooze black goop.
This is what makes jetting so fun. Many of the symptoms are the same so we need to look for other clues.

Now in regards to your bike, it appears rich (smoke, foul plugs) but it won't idle down which is a lean. That may be caused by a leak...maybe not. It may be caused by a plugged pilot jet or any number of things.

I feel you may have multiple issues... none of which have to do with premix ratios, or carburetor (even though a flatslide would perform better).
That is alot of smoke...check for head gasket issues or a vacuum leak. A head gasket is $15...may be worth a look.

Marc

what is your jetting recommendation...the bike is (from what i was told by previous owner) bored 40 over...fmf fatty with the turbine core silencer..and im at sea level

[rjs89ia]

i didnt read everything here but i noticed you said you backed the mixture screw out to lean it out. thats wrong you need to turn it in to lean it out. also whats it do at 1/4 to full throttle does it run clean or like a p.o.s. wheres the clip on your needle 2nd notch from the top is normal anything lower and you'll be runnin rich. if your needles there id say you might have to come down a size on the pilot to lean out your idle circuit so it doesnt load up when your barely on the throttle

[rjs89ia]

forgot to add if it went from running great to turning in to a tuning nightmare then id say you should redo the topend after 4 years its probably gettin a little wore out depending on how much you ride. they always run like crap till the last second when its finely doing better then pop!

[threewheelin-feelin]

it runs fine at quarter to full throttle with a new plug..its just a complete nightmare

[82 250r]

what is your jetting recommendation...the bike is (from what i was told by previous owner) bored 40 over...fmf fatty with the turbine core silencer..and im at sea level

fmf claims that no change in jetting is required for your bike...if it ran good before, don't change the carb settings until you find the problem. FYI Stock settings are below.

The air screw should be 2 turns out on a PE 34. (On any carb if the air screw is on the airbox side of the carb, it it always out for lean, in for rich)
Float = 16mm
Needle = 2nd groove (from the top)
Main = 142
Slow = 52

Marc

[82 250r]

it runs fine at quarter to full throttle with a new plug..its just a complete nightmare

An air leak will be most noticeable at slow speeds and idle.

[82 250r]

Did you check the head gasket? A new head gasket needs a retorque after one heat/cool cycle.

Are you losing coolant or trans fluid?

[threewheelin-feelin]

im not loosing coolant however, i did forget to retorqe the damn head gasket. probly ruined it. im loosing trans fluid because of the crack around my shifter. the jb weld wont hold it all in and i cant find a affordable left case right now. the carb as of right now is settings are pilot=52 main=135 clip=2nd groove air screw=2 and a quarter turns out the float im not sure about. also i did a little leak detection today. i started the bike and started spraying the carb with starting fluid. i sprayed around the base gasket, head gasket, carb, intake boot, air boot and i even sprayed the lower end cases and it never tryed to idle up

[threewheelin-feelin]

also i for got to mention i tried a 142 and 145 main jet and no difference other then it seemed like it fouled the plug quicker

[SteveCZ28]

ok spraying around gaskets like you did still wont determine if a seal is blown or leaking in the bottom end. its mainly the seals behind the flywheel/stator area. and behind the clutch and counter balancer areas

[threewheelin-feelin]

yeah i was just checking for any external air leaks to be causeing the lean condition 82 250r thinks it is. ugh all the 2 stroke nightmares i thought of when i purchased this bike 4 years ago are finally comeing true