SXR Sleeper jetting specs

Cross222 · 05-01-2009, 07:46 PM

Does anyone know what jetting Group K uses for the sleeper kit for the SXR.

Dano 7 · 05-03-2009, 12:11 PM

With the stock pipe. 132.5 mains, 72 pilots, 1.5 n&s, 65 g springs, and a blocked crossover in the intake manifold. I ran the high speed screws @1.75 turns and the lows @ 1.5 with larger pilots (77.5).

Dano 7

Cross222 · 05-03-2009, 10:59 PM

Quote:

Originally Posted by Dano 7

With the stock pipe. 132.5 mains, 72 pilots, 1.5 n&s, 65 g springs, and a blocked crossover in the intake manifold. I ran the high speed screws @1.75 turns and the lows @ 1.5 with larger pilots (77.5).

Dano 7

Thanks, that seems a little lean to me though. If I remember right, that is what the SXR comes with stock, and they run lean out of the box with no mods. Add Group K's porting and head milling and it should need even more gas. Hopfully Harry will chime in. I tried calling and email them but have yet to hear back.

mx595 · 05-03-2009, 11:44 PM

I think the blocked crossover makes it run richer.

Shonuff · 05-04-2009, 12:27 AM

Quote:

Originally Posted by Dano 7

With the stock pipe. 132.5 mains, 72 pilots, 1.5 n&s, 65 g springs, and a blocked crossover in the intake manifold. I ran the high speed screws @1.75 turns and the lows @ 1.5 with larger pilots (77.5).

Dano 7

Dano is correct for the most part except they don't make 72 lows, just 72.5 which is what Kawi runs stock. If you run aftermarket filters, I would jet up to 75 on the pilots.

With the big bore, surprisingly, you don't require much more gas. Turning higher RPMS and decreasing the backpressure with a pipe requires jetting up considerably.

Group K · 05-04-2009, 01:11 PM

Correct ... The blocked manifold makes the same carbs run much richer throughout the entire range.

Harry Klemm

Quote:

Originally Posted by mx595

I think the blocked crossover makes it run richer.

Dano 7 · 05-04-2009, 05:55 PM

Quote:

Originally Posted by Shonuff

Dano is correct for the most part except they don't make 72 lows, just 72.5 which is what Kawi runs stock. If you run aftermarket filters, I would jet up to 75 on the pilots.

With the big bore, surprisingly, you don't require much more gas. Turning higher RPMS and decreasing the backpressure with a pipe requires jetting up considerably.

My bad. Just typing too fast. 72.5 is correct.
Dano 7