Aprilia RS125 - Mixture Screw And Idle Speed Won't Work

[Ross46]

ood Afternoon Everybody

I'm in the process of rebuilding an RS125 and managed to get it started. the problem is that it will just about idle but that's with the idle speed wound all the way in and the mixture screw (Air or Fuel?) has no effect on idling. i have gone through google and the posts on here and checked as much as i can think of. the current settings are

PHBH 28mm carb (unrestricted bike)
Main jet - 122
Pilot jet - 62 (reduced from what i think was 65)
Emulsion tube - BN266
Slide - 45
Needle - x25

i have spare main jets and throttle tube (50) and some other parts that are the same. i rebuilt this carb as i snapped a screw in my old one so bought a stripped out carb and cleaned it, Cleaned all the jets with carb cleaner and compressed air. transferred all my bits to it with a new seal kit from aprilia, new float needle and set float gap to 24mm. I've changed the pilot jet down as i think it's running rich, (now a standard 62), checked the idle and mixture screws are the correct length and the o-rings are still good. Adjusted the idle with the throttle cable but the carb should just run off the pilot circuit and the idle screw to hold it at idle. i've also checked for leaks with easy start, any ideas? Thanks

[Ross46]

any ideas anyone? i feel like i've checked everything but there is obviously something i've missed. Can a carb just get to a point it's so worn it just needs replacing? Thanks

[Meatybeaty]

This is the closest i could find to yours, but looks like different jet sizes
www.dellorto.co.uk/shop/dellorto-motorcycle-carburettors-parts/complete-carburettors-dellorto-motorcycle-carburettors-parts/phbh-26-to-30mm/r4169-phbh28bd-aprilia-rs125/
and more from this site
https://www.apriliaforum.com/forums/showthread.php?84190-2001-Carb-settings