Ok so my buddy decided to go with the factory b pipe for the 93 sj project with a 760 in it. OK so my question is what is a good base line or starting point to go from for jetting the carbs. He is going to have the stock 38s on there. so let me know what you guys think.
Help with some jetting
- Thread starter Rheeder218
- Start date
no one can help?
ANT
Just ride
- Location
- Sea Isle City, NJ
Straight from FP's website:
Main 145
Pilot 120
High and low speed adjusters- 2 turns out from seated
stock N&S
spring- 95gram
These aren't exact they're just a starting point for you to work from. You have a bigger displacement so you might have to go up a few sizes on the jets, but you never know it may work. Here is a guide to help you: http://www.factorypipe.com/t_carbtuning.php
Maybe someone else on here has closer settings.
Main 145
Pilot 120
High and low speed adjusters- 2 turns out from seated
stock N&S
spring- 95gram
These aren't exact they're just a starting point for you to work from. You have a bigger displacement so you might have to go up a few sizes on the jets, but you never know it may work. Here is a guide to help you: http://www.factorypipe.com/t_carbtuning.php
Maybe someone else on here has closer settings.
thanks Ant. That could be a starting point for me. Im sure someone on here has this set and can put me a little closer.
ANT
Just ride
- Location
- Sea Isle City, NJ
if your not on a tight budget you'll probably be better off with a set of 44's on there, and there are plenty of people running them on their ski's here who can help and love them.
douglee25
m3booooy
- Location
- South Jersey
yes i do have 38s and yes we are on a tight budget thats why we went with the 38s
douglee25
m3booooy
- Location
- South Jersey
This is for stock 38's. I would go maybe 72.5 or so on the low jet though to be on the safe side. Jet down if need be.
Doug
http://www.factorypipe.com/media/instructions/yamaha/701SJ03.pdf
Doug
http://www.factorypipe.com/media/instructions/yamaha/701SJ03.pdf
jetskiking
Im done sanding!!!
- Location
- Dallas Georgia
- Main 135
- pilot 70 (stock)
- High speed screw 1 1/2 turns out
- low speed 1 1/4 turns out
- Neadle and seat stock (55Psi)
- spring stock(95g)
you guys think i should go up a atleast one for high and lows?
jetskiking
Im done sanding!!!
- Location
- Dallas Georgia
Yep , jets are cheap I would probably go a little rich then work my way down
#ZERO
Beach Bum
- Location
- Florida - U.S.A.
If you have to run dual 38's on a 760 cylinder with mods I would use;
72.5 Pilot Jets
140 Main Jets
95 Gram Spring
1.5 Needle and Seat
1-Turn Low Speed Adjuster
1-Turn High Speed Adjuster
The 38's will not flow enough for a 760 engine.
You can make them run, but expect about a 15-20% loss, compared to the 44's.
72.5 Pilot Jets
140 Main Jets
95 Gram Spring
1.5 Needle and Seat
1-Turn Low Speed Adjuster
1-Turn High Speed Adjuster
The 38's will not flow enough for a 760 engine.
You can make them run, but expect about a 15-20% loss, compared to the 44's.
ANT
Just ride
- Location
- Sea Isle City, NJ
I always do that, look at the single 44 when i'm looking for the 38's. my bad
sjetrider
615 Freeriders are addicted to T1 madness.
- Location
- in the 615 (Nashville)
75 pilot
145 main
1.5 n/s
95g spring
start 1.25 turns out on both adjustment screws, this will be close if not dead on.
I would have to agree on 38's being potentially too small for a 760 though. A single 46 or 48mm would be better, but dual 44 to dual 48mm would be best. Stock 760's came w/ dual 44's for a reasom IMO.
145 main
1.5 n/s
95g spring
start 1.25 turns out on both adjustment screws, this will be close if not dead on.
I would have to agree on 38's being potentially too small for a 760 though. A single 46 or 48mm would be better, but dual 44 to dual 48mm would be best. Stock 760's came w/ dual 44's for a reasom IMO.
well nto to be a prick here. but you you like to buy them?
coll i start wiht yours, because of it being richer. Id rather be on the rich side then on the lean side. Like i already said this before yes bigger carbs are always better but when you have limited amounts of money you are limtied to certain things. Im sure my buddy will end up buyin bigger carbs somewhere down the line. Thanks for the help.