SN 650 jetting

[3wheelerdude]

Anyone know what the stock jetting should be in a stock SN650?
And what do you think it should be (if any difference) with a Coffman pipe?

 

[Ryan_G]

Not sure about stock.
Coffman recomends 2.0 needle and seet, 1.5 main jet, and I think a 45 gram pop off spring. Ill check later, if im wrong I will repost and fix it. This is for the coffman sizzler pipe for the 650 superjet.
:beerchug:

 

[Ryan_G]

Correction. 65 Gram spring. HS and LS screws at 2 turns

 

[TheLostOtter]

Im running a 140 main, 115 pilot jet. I forget what the N/S is, but the pop off is ~30 psi.

Oh yeah, with a Riva pipe.

 

[orangefinger]

Jetting

STOCK

1,5 N&S 120 /115

SCREWS 1,0 /1-1/8's

COFFMANS >> I can e mail you the original instructions from coffman
2,0 N&S 125 Main 20 pop off
SCREWS 2,0 / 2,0 65 g

I could not run the 2,0 N&S as recommended ...why dunno ??
but the ski ran way to rich so I ended up with

1,5 N&S 120/135 65g pop was arround 20 I think

Screws 1,25 /1,5