new to scooters having starting issues....

[squirlgod]

Ok so I've worked on cars for years, but for some reason I cant get this 2 stroke to hold idle/run. Heres the situation: I just got this scooter a few days ago from a guy who said it has sat for a few months. things I've tried since I got it: replaced battery, cleaned carb (3 times), fresh oil, fresh gas, checked spark, and cleaned gas petcock. none of these things have helped at all. The scooter still starts up, sometimes revs somewhat high, and then dies. It also dies if you give it pretty much any gas at all. Here is a video of whats happening:

http://www.youtube.com/watch?v=GA-9Rwx3PrY

and heres it again with a lower idle set:
http://www.youtube.com/watch?v=u786iNwVKCo

I dont know if I need to clean the carb better? I shot every jet with carb cleaner and then soaked the whole carb in it for about an hour but I've never done this before so maybe it wasnt sufficient? the PO said it ran fine before it sat so I dont think this should be anything major. Thanks in advance for your help.

[evilone]

Have you checked for fuel in bowl right after it stalled?

[Bear45-70]

You still have a carb issue. Clean it again, following the procedures outlined.

http://hondaspree.net/wiki/index.php5?t ... r_Cleaning

and

http://hondaspree.net/wiki/index.php5?t ... ture_Guide

Make sure the float setting is correct and that the isolator between the carb and intake is installed correctly.

Then adjust the carb like this.

http://hondaspree.net/wiki/index.php5?t ... ts_-_Spree

[squirlgod]

Hey so I cleaned the crap out of the carb and it started up and throttled much much better. After trying to get it to idle though I ran into an issue.....I can only get it to idle when the wheel it stopped by the brake or ground. If the wheel is off the ground it idles at a super high rpm and when its stopped it idles just fine. It also likes to stall with high throttle and low speeds and accelerates super slow. What would cause this stuff? besides those issues it is good. once you get the speed high enough it tops out at around 31 mph....

[Bear45-70]

Hey so I cleaned the crap out of the carb and it started up and throttled much much better. After trying to get it to idle though I ran into an issue.....I can only get it to idle when the wheel it stopped by the brake or ground. If the wheel is off the ground it idles at a super high rpm and when its stopped it idles just fine. It also likes to stall with high throttle and low speeds and accelerates super slow. What would cause this stuff? besides those issues it is good. once you get the speed high enough it tops out at around 31 mph....

A screwed up carb or a big fat air leak in the intake system. Fast idle is cause by one thing, to much air.

[squirlgod]

ahhh that makes sense...thanks for all your help I'll look for air leaks and get back to you with results.

[patthesoundguy]

after watching the video it really sounds like the air hose is off of the carb or the airbox lid is missing its gasket once it idles you can spray choke carb cleaner on the air connections and if the idle drops when you spray a connection there is an air leak. just a thought.

[squirlgod]

Ok so I did find an air leak, and I fixed it with more improvement. Now I can get the scooter to idle alright with some fine tuning of the idle screw where the back wheel isnt turning. However, when I go ride the bike for a little while and then test the idle, it more often than not spins the back wheel fast again. I did notice that spraying carb cleaner on the choke affected the idle, and then realized that the choke O ring is missing. I wrapped some duct tape around it and it still is doing the same stuff. I ordered the right o ring and it should be here Thursday...could that be causing this? I was thinking that when it is first started the choke is not an issue, and then once it warms up it leaks...any thoughts?

[Bear45-70]

Ok so I did find an air leak, and I fixed it with more improvement. Now I can get the scooter to idle alright with some fine tuning of the idle screw where the back wheel isnt turning. However, when I go ride the bike for a little while and then test the idle, it more often than not spins the back wheel fast again. I did notice that spraying carb cleaner on the choke affected the idle, and then realized that the choke O ring is missing. I wrapped some duct tape around it and it still is doing the same stuff. I ordered the right o ring and it should be here Thursday...could that be causing this? I was thinking that when it is first started the choke is not an issue, and then once it warms up it leaks...any thoughts?

You always adjust the idle mixture with a very warm motor, so after a ride is when you adjust it.

[patthesoundguy]

make sure you do the idle mixture when the engine is warmed up. In the manual there is a real easy way to test the bystarter. You apply air pressure to the bystarter port on the carb. It should pass air when its cold and not pass air when its hot. If the bystarter is still leaking this test may help find it. My bystarter had a leak where the wires went in, that test found it. Sounds like you are on the right track though. I managed to find a decent price on a new bystarter from china to have on hand for a spare, not much luck tracking one down anywhere else yet. Looks like its the same, I just have to crimp on some bullet connectors and off it goes I hope. http://www.ebay.com/itm/Carburetor-Carb ... 1307wt_754

[squirlgod]

Yeah that makes sense I dont know why I didnt think of it before. I'll re-adjust the idle and replace the O ring. Should help further...Its almost perfect.

[squirlgod]

ok so now the idle seems to work nice, so I rode it for a while and found one last problem.....once it gets warm and I rode it for a while, it's torque output went way down. Like it accelerated super slow and would stall out with full throttle at low speeds...it's full speed was still quite high however. what causes this?