*^%$^ 2 stroke, one more try!!

[Dave223]

Ive had it with 2 strokes!!! It just took me everything I had not to bash in the tank....

I replaced the reeds, ordered a kit and rebuilt the carb, replaced the plug with new, checked the wiring harness. I will give this one more try and if no-one can help me solve this...Im smashing this p.o.s.

I have an 84R, I just finished doing all of the above. I was meticulous(sp?) with the carb cleaning,installed new jets (130,50), reset the new needle to the 3rd slot from the top like the manual says, reinstalled everything, fired it up and took it for a run.
I went turn around in the back yard and it whipped around it had so much power. WOOHOO, I finally got it I figured I thought! Went out into the street, got into the throttle quick but steady and it started to take off, then fell flat on its face and died like it ran out of gas.I shifted it into neutral and pushed it back into the shop.
Now the part I dont understand. I have a new, clear fuel line from the tank to the carb. When I turn the fuel on Nothing happens. Pull the line off the petcock, turn the fuel on, runs out fine. Pull the line off the carb end, turn the fuel on and runs out fine. Take the plug off the bottom of the bowl, turn the fuel on, runs out fine. Put it all together and turn the fuel on with an empty line, NOTHING happens, no fuel. I checked and removed the gas cap, still nothing. I pulled the carb again and checked the overflows from the bowl and they are all clear. WTF?

This is the best way I can describe the way its running. Immediatley after I rebuilt the carb it ran AWESOME, wound up nice an quick. Within 45 seconds it wont even idle, touch the throttle and it dies. (This is what it was doing when I got it so I figured it was the carb.) Pull the choke and it will kill before I can push it back down. What else can I check? I felt the coil, thinking it was possibly getting hot or something, nice and cool. The plug is tan, not oily black like it used to be when i had a 140 jet in it. Im getting nice blue fire on the plug when I spin it over. AHHHHH, I wanna pull my hair out here!!!:mad: :mad:

[team-red-rider]

try a new petcock??????

[youngbansheeman]

Clean the petcock and the carb again take off all the jets and clean them with carb cleaner that should do it!to check to see if its the petcock get a funel hook it up to the carb like if it was the tank then put some gas in it if it stays there after a while it is the petcock and if the gas doesnt go no were the carb messing up!But a good cleaning should do it!

[ceaserthethird]

Sounds like the " PetCock / Fuel Valve & Fuel Filter Check it ....

or it could be the Float ...

[smyers33]

Is the little vent tube thing on top of the tank clogged with dirt or anything?

[Dave223]

the vent tube on the gas cap is fine, I even removed it.
Somehow I dont think the petcock is the problem, if I pull the fuel line off the petcock and turn it to "on" or "reserve" it flows just fine. If I removed the plug from the bottom of the carb and turned the fuel on, it flows, wouldnt that rule out the float also? thanks guys, Dave

btw, I just went out and started it..it will idle for a few seconds and die, sounding like its running out of gas. As soon as I hit the throttle the least little bit, it bogs and wants to die.

[brrcuda]

don't give up - youre so close. Either gas or spark. I had a similar issue with my triz and turned out to be my stator came loose and i was losing spark at higher revs. make sure you got good spark first. Sounds like you took care of the gas flow from what your saying.

Any crap in the tank that would clog your main or pilot jet?

these 20 year bikes can be frustrating though

[darrel632]

Your float hanging up? sounds like your sucking the bowl dry and the fuel isn't being replaced or the float tab is bent incorrectly and not releasing the fuel valve

[nouseforaname90]

Sell it to me and I will fix your problem for you.. :)

[ceaserthethird]

try adjusting your idle screw .... I hear your Pain

Don't Give up , your omost their !

[youngbansheeman]

Check the floter it might not be litting in the gas the fuel valve might be stuck or dirty thats why the gas is not going trew~

[Unclediezel]

Chec the bowl vents on the carb. Fuel is gravity fed and once it gets to the bowl it must displace the air in the bowl. the reason it flows when you uncap the bowl is because the air has a place to rush out to.

[82300R]

don't give up you will get it. when you get aggravated just stop and take a break. when i rebuilt my top end i took my time,made sure every thing was right. fired it up and it would idle very high. put my hand over the air box and it would idle fine. turns out one of the six bolts on the intake boot had cracked. amazingly the whole bolt backed out hanging by a thread. replaced it and everything was fine. so hang with it. your close.:beer

[traxxasx]

SOUNDS LIKE YOU FLOAT IS STUCK IN THE CLOSE POSITION NOT LETTING GAS GO INTO THE CARB. i WOULD CHECK THAT FIRST.

[Erics350x]

Chec the bowl vents on the carb. Fuel is gravity fed and once it gets to the bowl it must displace the air in the bowl. the reason it flows when you uncap the bowl is because the air has a place to rush out to.
i second that..

[InPiEcEs]

I would check the float height.
You adjust it by gently bending the tab that hits the inlet needle.
Also, when you pull the carb, remove the bowl, and tilt the floats up and down with the carb right side up, as mounted.
The needle should move. If it does not, it is sticking, and needs replacement, or cleaning.
It also possible the floats are hanging up on something.
They may have gotten bent. It is possible that the vents could be plugged, but I would think it would still get SOME fuel. Although what Unclediezel said does make sense.
Iwouldn't rule it out, but still think it's in the float or needle.

[ceaserthethird]

Any UpDates:confused:

[Dammit!]

Definitely does sound like either a float adjustment issue, clogged vent or a bad needle valve. My money would be on the float adjustment. If the float closes the valve when there's only a little tiny bit of fuel in the bowl, it would definitely cause all of the same symptoms you're having.

[Dave223]

I havent had time to look into it any further, I did start it again last night after it sat for a while. It started up for a while, idled good, but any time I gave it throttle it wanted to bog. After a lil while it died out and didnt restart. Im thinking it ran whatever fuel was in the bowl. I will go down later and switch out the petcock with my 250sx if they interchange, if not I have a plastic tank from a dirtbike I will set on the frame. If that doesnt solve the problem I will pull the carb again.

My manual doesnt show it but when I set the float height, shouldnt the carb be on its side? And, on the needle is a little pin, should that be pushed in when its set or just at the point that it starts to depress it? And the manual shows the setting is .79, correct?Thats how I set it last time.
Also, the bottom of the floats are "crowned", not flat. Should the float height be set at the highest point of this crown or the flat ridge area before it starts the taper? Sorry if this is vague, its the only way I know to describe it. Thanks for all the help and advice, I promise I wont destroy this R, no matter how ugly it is ! I have wanted an R forever, and I finally have one, I just know squat about 2 strokes. Again, thanks for helping me out , Dave

[youngbansheeman]

YOu should put some pics up!

[Dammit!]

I very seriously doubt your petcock has anything to do with it. If gas flows out when you turn it on, it's working.

I don't use the manual method for setting float height. I take the bowl off, hold the carb upright just as if it's mounted on the bike and just kinda eyeball it. Push the float up and see how far it has to rise before it closes the valve. If it doesn't move much at all before the valve is closed, there's your problem.

[InPiEcEs]

One way you could do it like I always used to do is pretty much like Dammit said.
Pull the bowl, and and adjust the floats so the float legs are parallel to the mounting surface for the bowl. If it seems a little rich(like the choke is partially on), or it dribbles fuel out, take em up a little higher. I'm willing to bet it's a float or needle issue, but I wouldn't rule out plugged vents,either.

[Unclediezel]

Ive ALWAYS eyeballed my floats. It seems if I set them up spec.--theyre never right!--While the bowl is off, turn the carb upside down and blow into the fuel inlet. --It should be blocked, Carefully turn it right side up and blow again. it should be clear. The weight of the float itself should be enough to seal the needle.

Just a Q--????--You dont have the rear wheels up on cinder blocks do you? if the bike isnt level, IT CAN-(Not Will--I did say CAN) mess up fuel flow.

[Dave223]

no its sitting on all 3 wheels, I had a serious migrane most of the day so I didnt get to mess with it. i will look into it tomorrow or Sat. Thanks for the replies, dave

[Dave223]

ok one more shot at this , if it doesnt get any better its getting parted, sold, something...

I swapped tanks, petcocks..good fuel flow to the carb, same as the original tank.I cleaned the original tank and petcock and mixed fresh gas. I pulled the carb and completely disassembled it. I could find nothing clogged, dirty, and no trash at all. I cleaned it again andI reset the floats higher. With the carb level, I set the floats just a tad higher than level. When I look at the lowest part of the floats at their highest point they are above the jets.

I reassembled everything and started it. It idles like a dream, all day long if I let it.I set the idle kinda high and it will still idle fine. Bump the throttle a little and it revs fine. If I wrap the throttle past half, it bogs, then has trouble idling. 2-3 times like this and it will die. Nothing I do will stop it from dieing.
I try to kick it over and it will not start (with or without the choke on). 5-6 kicks and it will backfire/ pop LOUDLY thru the carb and exhaust. Still wont start.

I pulled the plug right when it does this and Im getting nice,fat, blue spark. I pulled the cover on the flywheel, the key isnt sheared or partially sheared and the timing? marks on the stator plate are lined up. Its not fire. Also note that everything under this cover is dry.

As I was checking and going over everything I did notice one thing thats got me wondering:
Where the pipe meets the exhaust flange, I have what appears to be oil dripping between the 2 parts. It looks like engine oil sorta. The 2 stroke oil Im using is blue, this appears to be a little thicker and black and doesnt have that 2 stroke oil smell. Could I possibly have a seal thats leaking? and if so, would this cause the problems Im having? Which seal and how do I check it?

I rode this trike once, on Good Friday a year ago, and it ran decent all day except that anything more than almost 3/4 throttle and it would just fall on its face and bog. When I would let up, it would be ok. Now it wont even do that. Im beyond being pissed off anymore, If i cant get this solved, its gone. Thanks for the advice, I wouldnt be this far if it were not for you folks! Dave

[Dammit!]

That oil under the pipe is normal. It's burnt 2-stroke oil.

Have you pulled your reeds and inspected them real closely?

[Dave223]

i just replaced them with boysen, last thursday when I rebuilt the carb. They seemed to fit fine, no gaps, even put loctite on the screws.

[Dammit!]

Was it doing this before you put the new reeds on?

[Erics350x]

your float is still set to low.

[don250r]

was it running stock metal reeds??
if it was drop the Main jet 2 sizes and see what happens..........
have had ALOT of experience with jetting 250R air and water cooled motors!
ALWAYS start with the main jet.
AFAIK float height(to a point)is relative to what you want.
I run my float heights a little high because of the big carb(38mm PJ on a 250R[with makes the main a little rich]).
Jetting is a fine art, and is TRIKE SPECIFIC!
when converting from factory metal to power or pro reeds, the instructions say 1-3 main jet sizes lower.
look @ jetting theory 101
and always do a plug-chop with a fresh plug, after its Fully warmed-up.
Hope this helps

[Unclediezel]

Take the air filter off, and start it. give it a minute or two of Idling To "Find itself". and whack on it, if the bog is gone , its too rich, if its worse , its too lean. Alternative---Get a can of carb cleaner and slowly open the throtle. When it starts to stumble, a "SMALL" spritz of Carb cleaner down the throat. What happens?-Clears up--too lean---Dies out --too rich. Dont bail on it now. this is the easy part, although extremely frustrating.

[SYKO]

I know you may have done this, but do it again, put in a fresh plug. why? well I jsut replaced my gf's plug in her blaster today. it would start and idle perfect then take off and then fall flat on its face and bog and die out, I was like wtf? so my homie came out and he jsut so happend to have an extra plug, and walla, she has been iding it all afternoon! plugs can be crazy acting someitmes, I checked the plug it had wicked fire, but it would still bog down, but a new plug fixed the prob, I also had this problem on my R one time as well, and a new plug fixed it right up!