Derbi GP1 LC 50cc cutting out By frolicndetour (Read 4,468 times)

[Bashan]

Well it's got to have something to keep the air/fuel mixture from coming back through the carb doesn't it?

[cyborg]

That's what I was referring to,,, the reeds are behind the carb in it's own separate holder or block,,,, it very well could be a carb issue but the symptoms he is describing sounds very much like a split or chunked reed,,, I may be wrong ,,, it won't be the first time,,, and probably not the last either

[frolicndetour]

Hey guys. Thanks for all the advice. I played with what I thought was the idle screw and fuel/air mix screw and got the bike running for a bit. Doesn't sound right, and it kept wanting to cut out. Check it out. And like thirty seconds in I zoom in on the idle screw, next to what I THOUGHT was the fuel adjustment screw. Having second thoughts about whether it was.

Derbi GP1: Current failing condition:

[Guitarman]

Looks like its running rich. Give it a little throttle on the next video so we can see which way you need to adjust it. And the screw we saw near the end reflecting the red is the idle screw.

[frolicndetour]

This is me starting it up, I gave it a little throttle and it shows how quick it often cuts out.

[Guitarman]

The crickets in the background need a touch of oil. They're pretty loud. LOL

I think you're running rich. Go to the Library here and find your carb and how to adjust it. You might have one like I did where I had to either take it off to adjust it or get a special right angle tool to reach up under it. My A/F screw was on the bottom of the carb.

It doesn't sound too terribly bad actually. I think if you add some piano and a little bit of guitar, you might have a hit on your hands.

See how much smoke came from your pipe? That's normal on a startup but should cut waaay back after a minute or so of running.

[frolicndetour]

Oct 12, 2014 17:08:50 GMT -6 Guitarman said:

The crickets in the background need a touch of oil. They're pretty loud. LOL

I think you're running rich. Go to the Library here and find your carb and how to adjust it. You might have one like I did where I had to either take it off to adjust it or get a special right angle tool to reach up under it. My A/F screw was on the bottom of the carb.

It doesn't sound too terribly bad actually. I think if you add some piano and a little bit of guitar, you might have a hit on your hands.

See how much smoke came from your pipe? That's normal on a startup but should cut waaay back after a minute or so of running.

Running rich. I checked the help library section and found a thread that stated I should try to wind back the fuel/air mix screw counterclockwise if its running rich. I am pretty sure the screw next to my idle adjuster is the fuel/air mix screw, but I'm not certain. It DEFINITELY has a spring behind it (it makes a noise when I twist it). I was playing with it yesterday prior to reading that it needs to be adjusted ever so slightly. I cranked the thing completely tight with over 10 full turns. I'm afraid I'll never find the spot it is supposed to be (if that is even my fuel/air mix screw!). I'll have to take a picture. My carburetor looks slightly different than most of the pictures I see online.

I'm done school next week and plan on dedicating Wednesday/Thursday to tearing all body parts off, pulling the carb, testing fuel cock and draining/replacing coolant. Maybe an air filter if I feel crazy! I ordered a book off Amazon that should be here by then (Haynes Manuel to twist-and-go scooters, www.amazon.com/gp/product/184425920X)

You can consider my problem resolved because I'm not really in a position to work on it right now, just fielding for advice. I'll post back to yall after I make an honest attempt! Thanks!

P.s.,I don't like hearing my own voice, so I don't record myself often. I was surprised to hear the birds and cricket sounds in my backyard!