700 rmk jetting help

[maxwell]

i inherited a 1997 700rmk and it has...

vforce reeds, slp twins, slp powerdomehead.


i have no idea where to start jetting this thing it bogs and runs not very well

if someone has a deecent setup for the needles and main jets let me know where to start.

the previous guy didnt reaally know what was goin on and just sort of tryed diff things and its all messed up.

[RMK Junky]

CARBURETOR TUNING
IMPORTANT NOTE: Carb tuning specifications included in this section are a
base line and should be adjusted as needed for your particular atmosphere.
Use exhaust gas temperature gauges or monitoring plug and piston color for tuning guide.
FUEL RECOMMENDATION: Due to quality variance in present day fuels, SLP recommends
unleaded premium (91 octane) for all snowmobiles. Fuels containing alcohol or
clean air additives will require larger main jets, usually two sizes more than the SLP
jetting chart. Jet needle must be raised one “E” clip position.
OIL RECOMMENDATION: For high performance trail applications SLP recommends SLP brand XPT
injection oil.
POLARIS 700 RMK/SKS/XC WITH SLP PIPES AND STOCK AIR BOX
0 to 3000' ELEVATION
1997 RMK/SKS/XC 1998 RMK/XC
Pilot Jet 45 Pilot Jet 38 (stock)
Needle R1370G clip #4 (stock XC/SKS) Needle R-1368G clip #4 (stock XC)
Slide 6.5 (stock XC/SKS) Slide 6.0 (stock XC)
Air Screw 1.5 Turn Air Screw 1 turn
Note: Air temperatures below 10 degrees raise needle to #5 clip.
3000' & ABOVE
1997 RMK 1998 RMK 1997 SKS/XC 1998 XC
Pilot jet 45 42* 45 38*
Needle R1370J clip #3* R1371G clip #3* R1370G clip #3* R1368G clip #3*
Slide 5.0 * 5.5* 6.5 * 6.0*
Air screw 2 Turn 1 Turn 1\2 Turn 1 Turn
Note: Below 0 degrees raise needle to #4 clip position. *Stock components
MAIN JET
ELEVATION -20 &BELOW -20 TO +10 +10 TO +40 +40 & Above
0-3000' 220 210 205 200____
3-6000' 185 182 178 175____
6-9000' 178 175 170 168____
9-12000' 172 170 165 162____
NOTE: For engines with porting or higher than stock compression, below 3000' use Keihin needle
P.N. N427-48-CCL. For ported engines, increase main jet size by ten numbers. Example 170 stock,
180 ported. Also, an altered air box, or SLP High-Flow Air Box Kit will require an increase of 2-3
main jet sizes (ie: from 170 to 175 or 178) and jet needle to be raised one clip position.
NOTE: After choke cable is rerouted for proper pipe clearance, it is very important to check for proper
adjustment. If cable is too tight, it will create a rich condition.

[RMK Junky]

Then when you have the jetting figured out there is always the second best part.CLUTCH TUNING POLARIS 700 SKS/RMK/XC
0' TO 3000' ELEVATION
Primary spring Almond/Gold P.N. 7041645
Primary weight 10-62 P.N. 1321586
Secondary helix SLP P.N. 40-48/42/34 or SLP Dial-A-Spring P.N. 43-48/42/34
Secondary spring Silver/Blue P.N. 7041646, pre load setting #2
3000' TO 5000' ELEVATION
Primary spring Almond/Gold P.N. 7041645
Primary weight 10-60 P.N. 1321587
Secondary spring SLP Black/Red P.N. 40-68 pre load #2
Secondary helix SLP P.N. 40-46/38/34 or SLP Dial-A-Spring P.N. 43-46/38/34
5000' TO 9000' ELEVATION
Primary spring Almond P.N. 7041566
Primary weight 10-58 P.N. 1321588
Secondary spring Silver blue P.N. 7041646 pre load #3
Secondary helix For best acceleration use SLP P.N. 40-46/38/34 or SLP Dial-A-Spring P.N. 43-46/
38/34, or for best back shift at higher elevations use SLP P.N. 44-50/32 or SLP
Dial-A-Spring P.N. 45-50/32
Above 9000' use 10-56 primary weight P.N. 1321684
Running RPM 8-8200
Timing Recommendation
For the most accurate timing, it is recommended to set timing at 8000 RPM. Adjust
timing to 14 degrees (.050 inches of piston travel) BTDC at 8000 RPM.
Since the OEM timing marks are hard to read and not always correct, a dial indicator
and degree wheel should be used to make timing marks on the clutch or
flywheel. Failure to adjust timing could cause loss of performance or engine
damage.
Low RPM Timing:
1997 XC, RMK, SKS 4 degrees 1500 RPM.0041" BTDC Piston Travel
1998 XC 4 degrees 1500 RPM.0041"
1998 RMK 10 degrees 3000 RPM.0254"

[RMK Junky]

Whew....Good luck

[maxwell]

thanks alot man, i usually dont change jetting for reeds....what about the powerdome. i couldnt find anything that says to change jetting for the powerdome head.

[Bryan m]

Originally Posted by maxwell

i inherited a 1997 700rmk and it has...

vforce reeds, slp twins, slp powerdomehead.


i have no idea where to start jetting this thing it bogs and runs not very well

if someone has a deecent setup for the needles and main jets let me know where to start.

the previous guy didnt reaally know what was goin on and just sort of tryed diff things and its all messed up.

i have a 97/700 rmk, same stuff as you . running around lloydminster,ab . i use main jet 195magneeto side/190 on pto side use a 55,on the pilots, turn air scew out 1 turn, runs rich when its warm out, better when a little colder, i got this setting from the slp website. use needle#1370g, set clip 2nd from the top,hope this works good for you, make sure to run gas line antifreeze , they freeze off very eazy,had this sled for 5 years , know it in &out! ,,let me know where you're from!! mabye phone me!

[maxwell]

yah im running 5000+ft so my settings will be a little diff
ill try what slp reccomends first but ill start

thanks man!

[Bryan m]

Originally Posted by maxwell

yah im running 5000+ft so my settings will be a little diff
ill try what slp reccomends first but ill start

thanks man!

then run 1370j ,needles 185mag/182pto,air screw 1 turn out .. just wondering if got a slp bottle on it , makes a world of difference? there cheap too!

[maxwell]

hmm no i dont have the boost bottle i have vforce reed and boots so i dont think it accepts the boost bottle?

i dont have any other needles soo ill try clip 3 first

[Bryan m]

Originally Posted by maxwell

hmm no i dont have the boost bottle i have vforce reed and boots so i dont think it accepts the boost bottle?

i dont have any other needles soo ill try clip 3 first

ihave the force reeds, it'll fit, with the dual the pipes, the cylinders cant equilize the pressures, the boost bottle does that, it makes a wold of differnce , there about $23.00, i counld'nt beleive the difference either, you'll love it!

[maxwell]

cool, ill have to try it, i jetted it as per slp. cleaned the carbs and set the needles. adjsuted choke and thrrotle cable.

runs like a champ now down here...farts a little on the top end but thinkin thats due to being jetted at 6000-9000

[Bryan m]

Originally Posted by maxwell

cool, ill have to try it, i jetted it as per slp. cleaned the carbs and set the needles. adjsuted choke and thrrotle cable.

runs like a champ now down here...farts a little on the top end but thinkin thats due to being jetted at 6000-9000

if it only revs to 6500rpm its to rich & if it revs to 7to7500 its lean you should hit 8000rpm & hang on the tourqe difference is awsome,get the bottle its smooths out everything+ more power! have fun!! lol if its back fireing on the top too lean!!!,i can pull 8400rpm out of mine! if you have any problems call me 780-875-1301