Air/Fuel Problem?

[WilsonT27]

Been having more bike problems again, my bike will only start when the choke is on ( little to no air intake) but once started the rpm is very high (5000-6000 RPM) only way to lessen it is by giving it a tiny bit more air by adjusting the choke but too much and it dies out . Also when given even the slightest bit of throttle on any choke setting it instantly dies , any ideas?

[husoi]

That means your mix isn't rich enough.

Either you need to adjust the carb or injection system.

Fuel filter is dirty

or, the carb is clogged.

Without know the bike and model and what fuel system you have it's hard to give a detailed advice.

[WilsonT27]

It’s a Sinnis SP125 Carb fuel system

[husoi]

It sounds the idle feeding needle may be clogged.

This is usually due to some dirt clogging it, just remove it and give it a clean. It it works properly have a look at the fuel filter and likely is that will need a new one.

If you're good at diy mechanics then a full overhaul of the carb is in order after you made sure isn't the filter needing replaced.

[fastbob]

Blocked Pilot Jet . Poke it out with something softer than brass such as a brush bristle, a piece of fishing line or a clean sliver of bamboo taken from a barbecue skewer .