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01 Summit 500F Jetting

mckinney

Member
Lifetime Membership
Dec 2, 2007
161
20
18
48
Evans, Co
I have a 2001 Summit 500F (fan), and the jetting seems to be rich at elevation what is everybody running. It is currently wife's sled and is hard to start when warm. If I could get jetting specs for Laramie Wy that would be great. Also would it help if I geared it down 1 tooth on the top gear? I know the sled is not made for high speed but anything would help in the powder. May try a longer track than the 136 stocker any ideas on that one?

Thanks in advance

Nate
 
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C
Nov 26, 2007
145
16
18
Maple Valley WA
The 2001 500F has an altitude compensator, so jetting should not be required. I have the exact same sled (I actually gave it to my dad for ice fishing). My wife rode it in WA at 3000-7000 ft. My dad lives in SD at 600 ft. No adjustments or jetting changes were required or needed. Starts on the first pull, cold or hot. Just an FYI.....
 

mckinney

Member
Lifetime Membership
Dec 2, 2007
161
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Evans, Co
Thanks for the info Catman. Maybe the floats need adjusted as it is hard to start when warm. We ride 8000 and up not sure if that matters had it at a small local shop around 5000 ft and ran great pulled the skis off the ground on the gravel. Is there anything for higher elevation that needs to be done?

McKinney
 

wildcard28

Well-known member
Dec 18, 2007
1,477
202
63
55
Clarkston WA
s375.photobucket.com
Can we see a pic of an 01 Summit Fan, some of us are unaware that the S Chassis was carried on past the typical 99` we most oftenly hear about along with my self I moved this post accidently cause I was unaware my self.

I had requested it to be moved back to where it obiously belongs, So I apologize Mckinney.

Could you show us a few pics on here. so we can see what it looks like, (I have seen the pic you sent me and, good looking sled).

I searched skidoo.com my self and seen it was offered up to 01` and couldn`t find one in 02` or up so is this the last year this chassis was an option or did I just not find it?

Thanks, Darren
 
P

portgrinder

Well-known member
Nov 26, 2007
1,161
407
83
Edmonton
If its rich everywhere, change your main jet.

If its just rich at elevation you have an issue with the alt compensator. Probably a leaking or cracked line.

Gearing down will always help but try and do one thing at a time.

You can figure out where you need to be main jet wise pretty easy. run your sled wide open for as long as you can...20+ seconds and kill the motor at wot. unscrew the plugs, you should be somewhere around light brown. black = rich, the lighter you go the leaner you are.
 
S
Apr 28, 2008
9
3
3
Frisco, CO
2001 Summit 500 Fan Jeting

My wife has the same sled and was hard to start warm. I talked to Matt in the service department at RPM Motorsports in Lakewood CO, and he had me put in smaller pilot jets. Unfortunately, I don't remember what size he had me put in. Give him a call at 303-232-7576 and I'm sure he will be more than happy to help you out.
 
S
Nov 26, 2007
2,684
179
63
53
Kennewick Wa
Not too sure about a factory altitude compensator?

We have found for the Northwest our 503F Hawk's work best with 170, 180 larger on the PTO/clutch side, change 60 pilots to 55, also take three weights from each three pucks in your primary Powerblock clutch, spot on 3,000-7,000 feet.

If you look around Ski-Doo used to put a TRA primary on their 503F powered 70-90's machines.:)
 
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mckinney

Member
Lifetime Membership
Dec 2, 2007
161
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Evans, Co
Jetting

Sweet got some help. Thanks to all. I will get some smaller jets been researching and Ski-doo used 1 size smaller in the year 02. Hey PortGrinder have you ever run a 500F? If I ran it at WOT for as long as I can I would run outta gas before I shut her down.:face-icon-small-ton Appreciate the help everybody. I also determined that teh small gear in the chaincase is a 17t, not sure i want to get any smaller then that. Might look into a 8 driver on the drive shaft but will try that later.

Anbody know how I could put a tach on this thing and what it should run for RPM's?
 
S
Nov 26, 2007
2,684
179
63
53
Kennewick Wa
7,300 Max

ENGINE
Engine type Rotax 503
Bore mm 72.00
(in) (2.835)
Stroke mm 61.00
(in) (2.402)


Displacement cm
3 496.70
(in

3) (30.31)
Compression Ratio 6.20
Max RPM Range 7000-7200
Piston ring type (1

st, 2nd) ST/R
Piston ring opening (new) mm 0.2
(in) (0.008)
(wear limit) mm 1.00
(in) (0.039)
Piston ring/groove play (new) mm 0.04
(in) (0.0016)
(wear limit) mm 0.2
(in) (0.008)
Piston/Cylinder play (new) mm 0.08
(in) (0.031)
(wear limit) mm 0.2
(in) (0.008)
Maximum connecting rod axial play (new) mm 0.2
(in) (0.008)
(wear limit) mm 1.00
(in) (0.039)
Maximum crankshaft axial play mm 0.3
(in) (0.018)
Maximum crankshaft curvature mm 0.08
(in) (0.031)
ELECTRICAL
Magneto output W 240
Ignition type CDI
Spark plug type NGK BR9ES
Spark plug gap mm 0.45
(in) (0.018)
Ignition timing before TDC mm 1.66
(in) (0.065)
Primary lgnition coil


W 230 - 330
Lighting coil

W 0.23 - 0.28
Secondary Ignition coil

W 5.1 - 6.3
Head lamp bulb W 30/30
Tail lamp bulb W 18/23
Fuse A 25

CARBURETION
Carburator type Mikuni VM34
Main jet (MAG/PTO) 205 / 220
Jet needle P-O (#159)
Pilot jet 60
Needle # 6DH2-3
Slide cutaway 2.5
Float height mm 23.9mm
(in) (0.94)
Airscrew position 1.5 turns
Idle RPM 1500
Fuel type Unleaded, 86 Octane
COOLING SYSTEM
Type Fan
Axial fan belt adjustment Deflection mm 9.5
(in) (0.375)
Force kg 5
(lbf) (11)
TORQUES
Cylinder head bolts N-m (lbf-ft) 22 (16)
Intake boots 22 (16)
Crankcase bolts 22 (16)
Magneto nut 105 (77)
Axial fan nut 65 (48)
Recoil starter housing bolts 10 (7)
Primary clutch bolt 90 (66)
PRIMARY TRANSMISSION
Primary clutch IBC Powerbloc
Number of weights per arm 9 (27 total)
Primary spring colour Violet (red/blue)

Engagement RPM 3450


Under $50.00
gasa_photo.jpg

http://www.tinytach.com/tinytach/index.php


 

mckinney

Member
Lifetime Membership
Dec 2, 2007
161
20
18
48
Evans, Co
Got some jetting

Called around and got some info. I had 190/200 with 70 pilot. He said to use 120/130 with 45 pilot info he pulled off from Ski-doo for high elevation. I could not go that far so I put a 140/150 with a 60 pilot and the air screw 1.5 turns. Any idea if the 120/130 going to be too small. We ride at 8000 and up, in Wyoming.
 
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