Actual Scooter Build: Step 4 - v.87

[the0captain]

Yup, its extending.

[Mystic]

have you checked the rubber end on the float needle valve. if it is worn too much the gas flow would never shut off but i would think it would come out the overflow if that were true

--also have you tried running it with your hand over the air intake on the carb ?

[the0captain]

Ive checked that too. Its shutting off. It was doing the same thing with another carb i had laying around too. I feel like im chasin my tail on this one.

[Mystic]

what about the reeds? have you taken the intake manifold off and checked there for problems, also i know you have checked the exhaust but what about the exhaust port itself? have you taken the head off and looked in there. i am just throwing out suggestions here

[the0captain]

If i put my hand over the intake it will die.

I have looked at the reeds and they look giod, no cracks or warping. I havent take n the cylinder off yet since it had 110 compression. The exhaust pirt looked ok from the outside though. It didnt seem like it was clogged but i suppose it could be. I think taking thecylinder apart is going to ve the next step since all the gaskets have been changed.

[Mystic]

i would just take the head off first and spin the fan so the piston reaches the bottom then inspect the ports with a flashlight

[the0captain]

i would just take the head off first and spin the fan so the piston reaches the bottom then inspect the ports with a flashlight

ports look really clean. actually, the cylinder itself looks really good.

there was alot of carbon buildup on half of the head. one side of the head looked black and the other half looked cleaner. is that an indication of something?

[Mystic]

maybe an exhaust leak

[the0captain]

So what does it mean when you take the air screw all the way lout, litterally put the screw in your hand, and then it runs right? that means its really rich right?

[Mystic]

that is crazy ahahhaha I dont see how the stock carb could run THAT rich at idle lol someone with more knowledge than me will have to asnwer this one

[the0captain]

I even tried removing the air filter and just leave the lid on but i still had to take the air screw out.

[the0captain]

i did notice however, as soon as i started it up after a day or so, i could give it throttle and it would respond very well, moving the back tire. then after 2 or 3 seconds it would just kind of flood out from there.

[Mystic]

have you checked to make sure the petcock is cutting off. my eve petcock had a small hole in the diaphram that leaked gas into the intake manifold causing it to flood. since it is getting more gas than it needs removing hte airscrew would give it plenty of air to compensate for too much gas allowing it to run i would think. have you tried taking the main needle from a different spree and trying that?

[the0captain]

petcock isn't leaking. i have a clear line on it and don't see anything coming out of the vacuum side.

[Mystic]

if the main needle diameter or taper is wrong it would allow more gas to flow by it than needed causing it to flood I would think. and you are sure there are no vacuum leaks anywhere? like the oil pump o ring or exhaust?

--just a thought why dont you take the motor you took of the other spree for the swap and put it on the 87 hahha if you sold some pieces just take them off the 87 motor lol