Reverse jetting- how does it work and what are advantages

[krawler98]

School me on reverse carb jetting. I've seen a lot of setups using big pilot jets and smaller main jets. How does it work, does it work better in freestyle applications, and what are the advantages?


Sent from my iPhone using Tapatalk

 

[Roseand]

http://www.x-h2o.com/index.php?threads/reverse-jetting.128496/
http://www.x-h2o.com/index.php?threads/mikuni-sbn-reverse-jetting.144877/
Recently asked threads that should answer your questions.

 

[speedysprocket]

Just depends on the carb. Don't expect too much out of your engines, bud. If they're pulling and there's no hesitation, leave them alone!

 

[lamar311]

Just depends on the carb. Don't expect too much out of your engines, bud. If they're pulling and there's no hesitation, leave them alone!

This is what I have been wondering as well. I have about 1/2 second hesitation. Granted I know I have a 760 non ported cylinder but still. Looking for the immediate snap and I have 190 psi compression, msd, b pipe, hooker prop, and 46 mm carb. I will be getting a lightened flywheel shortly but still wondering why no immediate snap?

 

[Half flip95]

tune your bpipe

 

[waxhead]

Im interested to learn about this as well

 

[krawler98]

Just depends on the carb. Don't expect too much out of your engines, bud. If they're pulling and there's no hesitation, leave them alone!

Haha thanks for the advice buddy

 

[Big Kahuna]

It is not a matter of choosing Regular Jetting or Reverse Jetting. Sometimes that is just what it takes to get all the potential out of your package.

 

[SpaceCowboy]

if you run Black Jack carbs Art recommends reverse jetting a lot...hasn't failed me yet

 

[lamar311]

tune your bpipe

If this was a reply to my set up I have already done this quite a bit. I have all screws closed but the top is 1/4 open with a FCV set at 5psi.

 

[tor*p*do]

my 650 6M6 with protec pipe uses reverse jetting
my 61x does not
I assume it is because the 6M6/Mik44/Protec pipe combo

 

[INDebtSJ]

I am looking for reverse jetting specs on my jetworks motor.
I am hoping that guys running the 900r with 46 BJ,s can help me out.
Right now it is rich.
122.5 main
130 pilot
20 pop off
7 mil stroker with 85.5 pistons
Stock ignition
B pipe

 

[Half flip95]

if it's rich, give it less fuel...

 

[augustaf]

Indebtsj, suggest you use 115 main, 125 pilot, n/s (no larger than) 2.3.

 

[Vumad]

Its my experienfe that tuning does not save time or money. Pick a builder, buy the parts they tell you to, assemble, give it to them to tune, enjoy life.

 

[kevbo]

tune your bpipe

Tune your pump.

 

[Big Kahuna]

I am looking for reverse jetting specs on my jetworks motor.
I am hoping that guys running the 900r with 46 BJ,s can help me out.
Right now it is rich.
122.5 main
130 pilot
20 pop off
7 mil stroker with 85.5 pistons
Stock ignition
B pipe

Contact Art at Jetworks

 

[squirtis701]

I'm doing the same right now. I am reverse jetting my 62t/61x b pipe, msd, lightened flywheel, freestyle port, 200psi. Mik duel 44s. Going to try. 110 pilots 90mains 1.5N/S. 27pop off. I'll let ya know if I knotice a difference.

 

[INDebtSJ]

Mine was super rich. Jetworks recommends
122.5 main
125 pilot
25 pop off
2.0 n/s
Bottom screw on b pipe open
hook the Flow control back up/no washer

 

[squirtis701]

Mine was super rich. Jetworks recommends
122.5 main
125 pilot
25 pop off
2.0 n/s
Bottom screw on b pipe open
hook the Flow control back up/no washer

Mine was super rich. Jetworks recommends
122.5 main
125 pilot
25 pop off
2.0 n/s
Bottom screw on b pipe open
hook the Flow control back up/no washer

Are u single or dual? And what brand?