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Anyone have phf carbs on paso
Posted: Tue Jul 02, 2013 6:06 pm
by muxey
I need to know what pilot jet size I have 65 but feel its weak any ideas ?
Re: Anyone have phf carbs on paso
Posted: Wed Jul 03, 2013 9:40 pm
by Skins
I have 36mm PHFs on mine. Years ago I did a lot of testing at idle and small throttle openings, and settled on a 60 in one carb and a 65 in the other. Can't remember which went in which carb, I'm afraid, but my bike has started and run great ever since.
Re: Anyone have phf carbs on paso
Posted: Thu Jul 04, 2013 2:56 pm
by muxey
Hi thanks, I have 65 in both but its very lumpy up to 3500 rpm
it also spits back on idle sometimes I figured i need larger jets ?
I hace checked all the outher obvious causes,
Any outher sugestions ?
Re: Anyone have phf carbs on paso
Posted: Thu Jul 04, 2013 9:58 pm
by Skins
http://forums.ducatipaso.org/viewtopic.php?f=1&t=95
... and thinking back to the tuning and testing I did, over many hours and days with detailed record-keeping, I believe I found the correct pilot jet and throttle stop adjustments (each which affects the other) right to within 1/4 turn of the screws on each carb (each of which affects the other) and then the carbs synchronised to within 1mm of slide movement.
I believe that is the sort of accuracy required for optimum performance.
If you then get the right chain adjustment, and the right ignition timing (both of which I do by the seat of my pants) you can have a very responsive, smooth, and fast bike.
Re: Anyone have phf carbs on paso
Posted: Sun Jul 07, 2013 4:41 pm
by muxey
Hi Thanks for the advice I feel i am getting there, killed the pumps it felt better,
then tried again with just a small ajustment I just need to keep going in the right direction,
