Aprilia RS4 50 carb/air filter/jets problem

[HarrisonTodd]

Was riding home a couple weeks ago when I lost power in the throttle, firstly thought it was the throttle cable that had snapped but I thoroughly checked it and everything seemed normal.

Got it home and started it up again but it was very sluggish and it wasn't even hitting 1000rpm at full throttle before it cut out. However, half throttle it seemed to pick up slightly but still only to 2000 max rpm.

I then took the air filter off and checked to make sure there wasn't a blockage. All was okay, but I started it up again and the rpm picked up to about 5000rpm on half throttle but still clogged out when full throttle. This has got to be an air flow problem?????

I siphoned out the 'bad' fuel and put in premium. Still the same when air filter was back on.

I have added carb cleaner to the fuel and have run it but nothing much seems to be happening.

Any advise please would be much appreciated.

Thanks

[redeem ouzzer]

Take the carb off.

Check it.

Clean it.

Report back.
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Be a REAL MAN!

[Easy-X]

Does sound like some shit's got in there... I'd go as far as clean/check/clean again
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[HarrisonTodd]

Cheers guys for your help, took the carb off and as I pulled it the main jet fell out. Tightened it up put everything back together and BOOM, running again....