go ped help

[motoman159]

hey guys ive got a bigfoot i got LAST christmas and its been running good and im good with bigger 2 stroke motors (quads) and ive run into a problem, i was riding and it and it bogged out and died... i pushed it home and found out there was a small hole in the pumper ball so i replaced it, and now its acting funny, its running but i didnt have a powerband so i did the gas cap thing and fixed that but it will run for about 30 seconds then bog and die, i sandblasted the plug so it helped a little bit but it will only run for a little bit and then bogs out, and the bottom end is terrbile, i know its not so great on a 2 stroke but still... and when i do hit the power band there rev hang? i was thinking airleak maybe? any help would be good, thanks!!! its got a alot of mods

 

[Awk08]

sandblasting a spark plug only works on 4 strokes, when a 2 stroke plug fouls, oil gets up in between the porcelien and center electrode, causing it to fire internally, and all the sand blasting in the world isn't gonna cure it. i have had some success cooking the oil out with a propane torch, you'll see yellow flame as the oil burns off.
but isn't buying a new plug alot easier ???

 

[motoman159]

sandblasting a spark plug only works on 4 strokes, when a 2 stroke plug fouls, oil gets up in between the porcelien and center electrode, causing it to fire internally, and all the sand blasting in the world isn't gonna cure it. i have had some success cooking the oil out with a propane torch, you'll see yellow flame as the oil burns off.
but isn't buying a new plug alot easier ???

it was a quick fix, my bike was at my friends house and my go ped was well, broken lol im getting one whenever i have a break from football.. (5 days a week i have school 9:30 to 4:30 then football 5:30 to 8:30 so im NEVER a home...)

 

[Braaaptor]

Are you running the stock Walbro WYL carburetor on that engine, or did you switch to an aftermarket carb with adjustable hi/lo speed circuits?

Either way, you probably need to tear apart the carburetor and install a rebuild kit.

You need a K10-WYL kit for the stock carb. Most aftermarket carbs take a K20-WAT kit. Id check your carb model before ordering.

These small, piston-ported 2-stroke engines are finicky and have to have a good, clean carburetor in working order for them to run right.

Your carburetor has a very small screen inside, opposite the inlet needle, which can become blocked. The ethanol in today's gas complicates the problem by attacking the diaphragms in there, too.

Do a carb job and see how it runs. If the primer bulb rotted away, 9 times out of 10 the problem has extended itself deeper into the carburetor.

 

[sporty982000]

Id agree, those screens in the carb are a pain. most of the time, I just run without them.

 

[motoman159]

Are you running the stock Walbro WYL carburetor on that engine, or did you switch to an aftermarket carb with adjustable hi/lo speed circuits?

Either way, you probably need to tear apart the carburetor and install a rebuild kit.

You need a K10-WYL kit for the stock carb. Most aftermarket carbs take a K20-WAT kit. Id check your carb model before ordering.

These small, piston-ported 2-stroke engines are finicky and have to have a good, clean carburetor in working order for them to run right.

Your carburetor has a very small screen inside, opposite the inlet needle, which can become blocked. The ethanol in today's gas complicates the problem by attacking the diaphragms in there, too.

Do a carb job and see how it runs. If the primer bulb rotted away, 9 times out of 10 the problem has extended itself deeper into the carburetor.

idk how to tell the carb, but i forgot to mention that its not a stock motor, its a g230rc with a sh*tton of mods.

 

[Braaaptor]

Pics will help. But no matter what kind of engine you have, carburetor problems will still cause it to run poorly. Almost all gopeds use Walbro carbs and they all work and fail in the same manner.

 

[motoman159]

ok, soooo i replaced the plug with a new one and got it started, it runs now and doesnt bog out and die but if i go into powerband it revs uncontroallby with spindal slip... ??????

 

[Braaaptor]

As long as the throttle cable isn't sticking, it sounds like you've got an airleak or a lean carb setting. If you can adjust the carb, open the hi speed needle 1/8th of a turn at a time to richen the mix slightly.

Unlike on Blaster engines and bigger 2-strokes, that little goped engine usually won't run at all if if has a major airleak.

 

[motoman159]

As long as the throttle cable isn't sticking, it sounds like you've got an airleak or a lean carb setting. If you can adjust the carb, open the hi speed needle 1/8th of a turn at a time to richen the mix slightly.

Unlike on Blaster engines and bigger 2-strokes, that little goped engine usually won't run at all if if has a major airleak.

ill have to check this weekend, only reason i did anything today was because football go canceled.. thanks braap! have some green

 

[Paulie B]

Good advice braptor.
Normally when these lil engines run on it's caused by a lean condition making too much heat until the motor basically diesels.