Carbi problems

[minibiker]

Ive got an OKO26mm and a 125 cc gpx engine when i get the tune right and ride it it works the next day or when its different tempreture it dosent work just kick it starts turns off before you can even rev it or it turns on but backfires the more you give throttle NEED HELP, can anyone tell me if i need to change the jets or what else could it be???

 

[my67xr]

sounds like the pilot jetting is still too lean,
what size jets are you running now in the pilot and main?
and how many turns out is your mixture screw?

 

[minibiker]

I dont know the size of the jets but the mixture screw is around 2-4 turns out

 

[my67xr]

ok, with the mixture screw being that far out, the pilot jet is too small
if you pull it apart and find it's a 36 pilot, then try a 38
then adjust the carby to suit, eg somewhere around 2 turns out on the mixture screw,
and the needle clip in the middle, then give it a ride, and go from there
it may need a new main jet too

 

[Phil67]

Yeah very odd problem on your bike. Hates to start, yet pulls first gear strong.

Pull the carby apart mate, let us know, as above, what jets are in it.

 

[minibiker]

Yeah ill take some pics of it tomorow and see what they are

 

[minibiker]

I just opened it up it has a 36 slow jet and 100 main jet, mv24 told me his jetting is the same, do you know the exact amount of turns i need to do for both screws then ill see if it works fine?

 

[minibiker]

Good new it works perfectly fine now

 

[Phil67]

Why what changed?

 

[minibiker]

I cleaned the carbi out properly took out the screws and put them in then started adjusting according to the revs and its fine now plus i fixed the electrics cause they were completely wet

 

[Phil67]

ahhhhh i see