re jetting and sxr mods

[the flying dutchman]

hey guys this winter ive did some things to my sxr and know it needs to be rejetted but what exactly do you all recommend, I have filers new impellor wet pipe power spray water box v force reeds ride plate and intake, lightend charging flywheel and boring my nozzle to 80mm, and also friend is trying to talk me into pump cone.

so how should I rejet and what all do you guys recommend everything sound good or to much to little.. all info is very great thanks!

 

[user_error]

80 lows 155 highs 2.0 n/s

 

[the flying dutchman]

ok thanks what do you think about my fuel mixture still keep it at 50:1 that's what I have always ran in it. also I have had people tell me about doing with the fuel air mixture? something like that not to sure

 

[user_error]

32:1

 

[the flying dutchman]

why the 32:1 vs 50:1

 

[Concep29]

why the 32:1 vs 50:1

With the mods you've done it will turn more rpm, generate more heat and put a bigger load on your crank. 32:1 is better protection for those differences. I've always ran ltd setups at 32:1 and my stockers at 50:1

Are the chokes removed from the carbs?

 

[the flying dutchman]

ok thanks man, the chokes are not? and as far as the rejetting specs I have had a lot of different numbers for the highs lows and n/s remain the same do you agree?

 

[Concep29]

If you haven't removed the choke plates, (the butterfly valves) you should be ok with the stock n/s. 80 low jets and 155 high jets is good as mentioned. Set the high and low screws at 1 turn out each to start. If it hesitates off bottom turn the lows out 1/4 turn at a time and test again.

 

[user_error]

i dont even run my stock skis with stock needle seats. i think a 2.0 n/s would help you out

 

[Concep29]

I don't use stock n/s either, but trying to make it easier on him. If he decides to pull the chokes and run a primer, yes add more fuel with 2.0 s


Here is what Factory Pipe Recommends


SX-R 800 Wet Pipe Jetting Specifications
Main jet: 152.5 front, 152.5 rear
Pilot Jet: 80
High-speed screw: 1/2 turn out from closed
Low speeds screw: 1.0 turn out from closed
Needle: Stock
Spring: Stock
Note: Stock compression & timing +6 degrees

Remove the rubber trumpets from each end of the air box or use aftermarket flame arrestors.

 

[user_error]

shoot on my stocker i run 150 mains, 80 pilots, 2.0 n/s. primers, flame arrestors, and custom water routing

 

[Big Kahuna]

40:1 is plenty. That is a mild limited.

 

[gaby7mm]

i got a wet pipe,flywheel,head,and i run the fp recomended jetting,this winter i remove the chock plate,do i need to re-jeted?

 

[Concep29]

i got a wet pipe,flywheel,head,and i run the fp recomended jetting,this winter i remove the chock plate,do i need to re-jeted?

Test and see...I'd say you'd need to be richer, bigger n/s at least.