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Old 03-03-2009, 12:40 PM   #121
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Since this has now turned into a discussion..My manual says use only genuine Picco glow plugs....I have never spoken with Jay, but I have had a few conversations with Maximo through PM's when I was considering buying one of his jammin mods. ( I bought stock instead) In my book, I would think Maximo to be the expert on these engines..He told me the composites used in the jammin carbs are better than the composites in the picco carbs, which Is where I got my info from when people ask me why buy the jammin over the Picco but hey, what the hell do I know........

The Jammin and Picco use the same composites, however I agree that the jammin carbs are superior.. The new Picco carbs do not have removable inserts, in order to cut costs Picco has gone away with the machined inserts, which now does not allow you to tune the engine using inserts.. The Jammin carb is the exact same carb but it still uses the machined aluminum inserts, which I like..... Both carbs still can suffer from the same leaking issues.....
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Old 03-05-2009, 11:18 AM   #122
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What factory of carb inserts we can use in the JPX 21 carb and what restrictor (7, 8, 9mm) works better?
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Old 03-05-2009, 04:05 PM   #123
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Picco carb restrictors fit..The carb itself if you look into it is tappered almost like its made for an insert, but no insert is included...The taper is 8MM so that would be the ideal insert, but for longer run times, with a slight drop off in power go with the 7 mm..you have to look around..Picco based Venturi's are kinda hard to find...maybe someone can post a link..I had mine made..
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Old 03-05-2009, 06:12 PM   #124
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Picco carb restrictors fit..The carb itself if you look into it is tappered almost like its made for an insert, but no insert is included...The taper is 8MM so that would be the ideal insert, but for longer run times, with a slight drop off in power go with the 7 mm..you have to look around..Picco based Venturi's are kinda hard to find...maybe someone can post a link..I had mine made..
The JPX stock (mine is in transiti) did not came with one insert? What is that red piece inside the carb that we can see in the pictures?
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Old 03-05-2009, 07:02 PM   #125
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The JPX stock (mine is in transiti) did not came with one insert? What is that red piece inside the carb that we can see in the pictures?
Yes, My bad, It does come with the red insert..when you look into the Venturi, you will see that the insert is actually bigger than the carb throat taper, in other words the throat taper is smaller than the insert..you will see what I mean when you get it
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Old 03-06-2009, 01:51 AM   #126
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Yes, My bad, It does come with the red insert..when you look into the Venturi, you will see that the insert is actually bigger than the carb throat taper, in other words the throat taper is smaller than the insert..you will see what I mean when you get it
ok...soo red inserts is like a 8 mm but the throat is smaller...something like 7 mm?
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Old 03-06-2009, 10:38 AM   #127
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Red insert is like 9mm, throat is 8..something like that..I have not measured, but you will see when you look into the carb.
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Old 03-07-2009, 11:43 AM   #128
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Stock form is fine for 30%. Break it in with 20% though..Byrons Rocks!!!
What kind of byron 30% you guys are using in this motor? The Ger2 or the Pr Driver? What is the best? Whats the diference in performance?
Thanks
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Old 03-11-2009, 04:55 PM   #129
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For those of you that keep asking......I just got off the phone with Ron from Nitrohouse..The Venturi's for all the Picco/Jammin carbs are as follows:

Part # 51428 8MM $7.61
Part # 51427 7MM $7.61
Part # 51429 9MM $7.61
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Old 03-11-2009, 05:34 PM   #130
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are you sure its not?

Part # 51428 8MM $7.61
Part # 51427 7MM $7.61
Part # 51429 9MM $7.61
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Old 03-11-2009, 05:42 PM   #131
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lol, Yes my bad...post edited..thanks
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Old 05-05-2009, 06:25 PM   #132
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I can not find the stock needle setting any were in this thread can somebody please let me know what they are. thanks for all your help
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Old 05-05-2009, 06:33 PM   #133
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The sheet that came in the box with my jpx says:

HSN = 5 1/2 turns out from closed
LSN = 6.5 - 7.5 turns out from closed or 1 turn out from ball end
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Old 05-05-2009, 06:38 PM   #134
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thank you but is it just me or is that a lot of turns out from closed.
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Old 05-05-2009, 06:41 PM   #135
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thank you but is it just me or is that a lot of turns out from closed.

factory break in settings are super rich! you can lean slightly if your engine is not new, or until it fires
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