How much should I increase my jet size after adding twin pipes?

[Alberta Beach Doo]

Just installed a set of PSI pipes on my 97 700 SKS. The pipes I have had forever. The sled I just got. I recall that I should be up about 5-7 jet sizes. I am not changing the reeds or getting a hi flow air box (slp). I am just looking for a base line starting point. Probably get a boost bottle and power packs. Will be doing a lot of plug and piston wash checks. Any input would help.

 

[Trashy]

5-7 seems a little extreme....... Do regular plug checks, and I doubt you'll have to go up 2 size's. The ACCS system was good in it's time, and it's very hard to kill that 700. Keep us posted how you made out?

 

[Alberta Beach Doo]

5-7 seems a little extreme....... Do regular plug checks, and I doubt you'll have to go up 2 size's. The ACCS system was good in it's time, and it's very hard to kill that 700. Keep us posted how you made out?

I don't believe the 97-98s had the Accs system. That was a elevation compensation that came in on the Gen 2. Sleds like the Vertical Escape had it. It's been a lotta years and a few beers but I am sure my 97 doesn't have it.

 

[Trashy]

Then your sled isn't a 97

The 97's did have ACCS, and now come to think of it...... I don't think that the 700 twin came out until late 98

 

[rightsideup]

the 700 came out for model yr 97 with kehin carbs and polaris never did offer there own accs system that was a doo feature

 

[pfi572]

Start big and work your way down?
Famous last words I thought?
1997 was a strong sled.
If I remember right hey had and different carb than mukuni?

 

[rightsideup]

Start big and work your way down?
Famous last words I thought?
1997 was a strong sled.
If I remember right hey had and different carb than mukuni?

yup kehin hopefully I did not butcher the spelling. I had a teal 97 rmk and 98 xc 700 in 99 my xc had mukuni flat slides.

 

[Trashy]

the 700 came out for model yr 97 with kehin carbs and polaris never did offer there own accs system that was a doo feature

I may be wrong with the year of the 700 debut, but the ACCS system was Poo. Doo had the HAC system in 97

 

[rightsideup]

I may be wrong with the year of the 700 debut, but the ACCS system was Poo. Doo had the HAC system in 97

I think you are correct would it have been on a xlt or 500?

 

[pfi572]

yup kehin hopefully I did not butcher the spelling. I had a teal 97 rmk and 98 xc 700 in 99 my xc had mukuni flat slides.

Yep the teal green rmk?
Drop one jet size and one tooth on top gear and it worked very well.
Had good compression that year .
Next year it didn't run as strong from what I remember .

 

[rightsideup]

Yep the teal green rmk?
Drop one jet size and one tooth on top gear and it worked very well.
Had good compression that year .
Next year it didn't run as strong from what I remember .

yeah high compression and I do not think it made noise standards as well and it may have been tuned down for 98.

 

[Trashy]

I think you are correct would it have been on a xlt or 500?

It was the xlt.... I'll have to dig up some old pics, I thought my 2000 700 rmk had ACCS

 

[rightsideup]

I had a 2002 700 rmk and a 2003 800 vert escape neither had accs

 

[Nytroman]

The gen 1's were accs? 2000 model style

 

[BIGHORN1]

I has a 99 700 rmk and it did have the factory accs, worked great.

 

[Dutchman]

Many moons ago, I had a 98 with Keihin carbs, and PSI twin pipes. Besides the main jet, the pilot jet was also changed to make it run nicer.
I seem to keep all these papers filed away. Here's a jetting and clutching chart that I used and found they were pretty darn close. Only diff was the "needle" was updated in 98. Exactly for your machine and pipes.......hopefully it will give you a better idea..........good luck

 

[Alberta Beach Doo]

Then your sled isn't a 97

The 97's did have ACCS, and now come to think of it...... I don't think that the 700 twin came out until late 98

The Polaris. Built twin 700 came out in 97. The SKS. And RMK had it. The head was purple and the sled was teal with purple graphic. In 98 the head was metal with red diagonal. Markings. That color was used later on the 800 head too. In 98 the sled itself was a deep royal blue. The ACCS. I believe is an altitude compensation system. I will bet you a couple of John Deere. Trail Fires. On this that neither 97 or 98 had the ACCS.

 

[rightsideup]

The Polaris. Built twin 700 came out in 97. The SKS. And RMK had it. The head was purple and the sled was teal with purple graphic. In 98 the head was metal with red diagonal. Markings. That color was used later on the 800 head too. In 98 the sled itself was a deep royal blue. The ACCS. I believe is an altitude compensation system. I will bet you a couple of John Deere. Trail Fires. On this that neither 97 or 98 had the ACCS.

I think all your statements are accurate hope fully

Dutchmans info is what you require

 

[retiredpop]

The Polaris. Built twin 700 came out in 97. The SKS. And RMK had it. The head was purple and the sled was teal with purple graphic. In 98 the head was metal with red diagonal. Markings. That color was used later on the 800 head too. In 98 the sled itself was a deep royal blue. The ACCS. I believe is an altitude compensation system. I will bet you a couple of John Deere. Trail Fires. On this that neither 97 or 98 had the ACCS.

You are absolutely correct. The ACCS did not come out until 1999 for the RMK600 and RMK700. They used it in 2000 as well on those two motors. In 2001 when Polaris switched to Mikuni flatslides there was no ACCS. The RMK500 used ACCS from 1997 to 1999. SKS did not ever have ACCS.

 

[Alberta Beach Doo]

Those 97 were awesome. I put over 5000 miles on it and it ran strong all year. I sold it only because well, it had 5000 miles on it! The 98 was strong as well. Only put about 3800 on it in one season. I got a 04 800 RMK 151 and a 05 XC 800. To me there never ran as hard as the 97-98's.