Gents,
I need some help. I have trawled through the set ups on here, but can't find any answers. Basically I have a 28mm Dellorto PHBH to go onto my 200 motor with an N.K. Exhaust. The problem is that the carb itself has a Power Jet right beside the Choke Jet. Any ideas what the starting point would be for jetting on this one ???
I have the following :-
AV 264
40 Slide
X7 Needle
50 Pilot
55 Power Jet (I think)
I have no idea if any of this is correct, and never had a carb with a power jet, so I have no idea what size of main jet I need.
Any ideas would be appreciated.
Cheers
Mark
28 PHBH with Power Jet
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lammy mark
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carlos fandango
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You could blank the power jet off ! Just put a bolt in it, its m5 i think. then blank each end of where the hose comes out of the float bowl and into the carb body , and jet as a non pj carb .
I've got a phbh with a power jet on an imola , I could give you the getting for that if you want ?
Russ
I've got a phbh with a power jet on an imola , I could give you the getting for that if you want ?
Russ
When i was young my Mom said "if you haven't got anything nice to say, say nothing at all " ..................... and people wonder why I'm quiet around them !
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lammy mark
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cheers Russ. Please send me your jetting to give me an idea.carlos fandango wrote:You could blank the power jet off ! Just put a bolt in it, its m5 i think. then blank each end of where the hose comes out of the float bowl and into the carb body , and jet as a non pj carb .
I've got a phbh with a power jet on an imola , I could give you the getting for that if you want ?
Russ
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carlos fandango
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Hi Mark
PJ phbh 30 on an imola with a pm pipe
av268
x4
5.0 slide
132 main
52 pilot
65 choke
30 pj
Ive also got a pj 26mm phbh on a std jet engine , this came off an aprillia RS125 ( i think) and was a four stroke carb, ive converted it to two stroke and blanked the PJ off. The reason i mention this, is just to make sure you know that your one is deffo a two stroke carb ? as if you got it off ebay or second hand it may be a four stroke one off an aprilia or mito etc. ?
PJ phbh 30 on an imola with a pm pipe
av268
x4
5.0 slide
132 main
52 pilot
65 choke
30 pj
Ive also got a pj 26mm phbh on a std jet engine , this came off an aprillia RS125 ( i think) and was a four stroke carb, ive converted it to two stroke and blanked the PJ off. The reason i mention this, is just to make sure you know that your one is deffo a two stroke carb ? as if you got it off ebay or second hand it may be a four stroke one off an aprilia or mito etc. ?
When i was young my Mom said "if you haven't got anything nice to say, say nothing at all " ..................... and people wonder why I'm quiet around them !
-
lammy mark
- registered user
- Posts: 65
- Joined: Thu Apr 02, 2009 11:32 pm
- Main scooter: Series 3 Special s type rep.
- Location: Belfast
- Contact:
Many thanks for the information regarding jetting...much appreciated 
"Ive also got a pj 26mm phbh on a std jet engine , this came off an aprillia RS125 ( i think) and was a four stroke carb, ive converted it to two stroke and blanked the PJ off. The reason i mention this, is just to make sure you know that your one is deffo a two stroke carb ? as if you got it off ebay or second hand it may be a four stroke one off an aprilia or mito etc. ?"
I did buy this carb of Ebay, but changed the atomiser bush over to take the AV range. I think this carb was originally on a Honda NSR or something like that.
Fingers crossed
"Ive also got a pj 26mm phbh on a std jet engine , this came off an aprillia RS125 ( i think) and was a four stroke carb, ive converted it to two stroke and blanked the PJ off. The reason i mention this, is just to make sure you know that your one is deffo a two stroke carb ? as if you got it off ebay or second hand it may be a four stroke one off an aprilia or mito etc. ?"
I did buy this carb of Ebay, but changed the atomiser bush over to take the AV range. I think this carb was originally on a Honda NSR or something like that.
Fingers crossed
Had the same carb on my lambretta
Got egt and afr gauges on board ~ Just couldn"t get it right
Swapped and changed everything ~ Blanked the pj off and no probs
Tried the camlam powerjet kit to the same carb ~ Also A pig
Powerjet carbs seem to be a on - off thing
A solenoid - type pj that would be a different story
These can be controlled by relays automatically from either egt"s or afr"s
Or manually via a headset switch/button
Regarding these ebay carbs
The majority are 2 stroke carburetors off ~ Nsr"s - Aprillia"s - Caviga Mito"s
Difference is ~ These are set-up for reed-valve 2 strokes not piston ported engines
The atomisers are not compatible
Got egt and afr gauges on board ~ Just couldn"t get it right
Swapped and changed everything ~ Blanked the pj off and no probs
Tried the camlam powerjet kit to the same carb ~ Also A pig
Powerjet carbs seem to be a on - off thing
A solenoid - type pj that would be a different story
These can be controlled by relays automatically from either egt"s or afr"s
Or manually via a headset switch/button
Regarding these ebay carbs
The majority are 2 stroke carburetors off ~ Nsr"s - Aprillia"s - Caviga Mito"s
Difference is ~ These are set-up for reed-valve 2 strokes not piston ported engines
The atomisers are not compatible