Only starts with NO air filter fitted !?

[Dobo]

I have a RamAir filter and expansion exhaust, Jetex 22 carb, has been running ok! Now I run for short distance and it chokes up, smokes . . . choke is fine and OFF. Stop and remove RamAir and off we go. Why on earth is this happening guys. Any suggestions please?

[Wack]

Tried riding with the panel off?

[peejay]

is the filter clogged up?

[Adam_Winstone]

Excessive bore/ring wear?

[Dobo]

Yes tried with panels off . . . no joy. The RamAir is clean! Don't know about the cylinder or rings! How would that work anyway?

[Raveydavey]

If removing the filter makes it "fly" then the filter is restricting air excessively. Similar to putting your hand over an open carb....it's choking it. Clean/ wash/ replace the filter would be my first port of call

[Dobo]

Hi guys, thanks for responses. I got it wrong originally 'cos the scoot starts ok, ran for a mile-ish then choked up when we slowed down! I've given the RamAir a good clean in petrol, checked the plug and tried once more. Same result, choking and black smoke when we come to a stop!? HELP.

[MickYork]

give the carb' (pilot jet) a good clean. Check float bowl and filters for muck & gunge. try a new filter