M8 clutching setup list - post your setup

Nubulin · Sep 20, 2009

Please post the clutching setups you are running on your M8. we have had good feedback on these threads in the past.

Sled year
Track
Rider weight
Altitude
Mods
Primary spring
Weights
Secondary spring
Helix
Gears
Peak RPM
Engagement RPM
General thoughts about the performance.

Thanks!

dmkhnr · Sep 20, 2009

08 M8 153 nightfire with powerclaw track, SLP pipe/BD box, BD intake, Oil delete, Mesh hood, 09 rear tunnel, boss seat. 505# fueled.
7-10k elev, 185# rider.

70# light tip, Tit yellow/shift assist, Tit orange 36*. 8000+ rpm

08 M8 162 standard with powerclaw track, SLP pipe/BD box, BD intake, Oil delete, Mesh hood, 09 rear tunnel, boss seat, Porting/Head. 510# fueled
7-10k elev, 185# rider.

73# cutler adjustable, AC orange 0646-248/Torsion secondary with 38-34 helix AC snopro green 2nd hole. 8200+ rpm

iluv2fly · Sep 20, 2009

-09 M8 standard model
-162 powerclaw track
-SLP pipe and silencer
-SLP porting and head mod
-Power commander III fuel box
-SLP intake
-SLP powder pro ski's
-Both primary and secondary clutch balanced at SLP
-74G MTX weights with no rivets in primary and 160/310 primary spring
-Secondary has stock orange spring with SLP 44/36 helix
-This clutching setup ran 8100-8200 rpm at 8-10K
-Engagement is about 3600RPM
-Stock gears
-Rider weight 210 lbs.
-Had 09 Boss seat but just purchased a 2010 cat seat. I liked the Boss but it was hard on the butt.
-This thing performs awesome and I have been very happy with it. I love the 44/36 helix as it takes off hard and still backshifts great. I was worried about having all the porting done and than spending countless hours messing with the fuel box to get it to run good but everything worked perfect and I never even touched it. The one thing I regret was not changing out the helix sooner. I was worried that it would screw up all my clutching and that I would be messing with it all the time. 44/36 helix made a very nice improvement.

montanasledder · Sep 20, 2009

just finished the SLP single install on my 09 m8 153 Limited. i also installed the shift assist and just sent both clutches to SLP the balance them, Im gonna try leaving the driven stock and run 70 gram with the stock spring in the primary. SHould run around 8000 i hope.

after the snow flies ill see if i have to adjust anything

iluv2fly · Sep 21, 2009

montanasledder said:
just finished the SLP single install on my 09 m8 153 Limited. i also installed the shift assist and just sent both clutches to SLP the balance them, Im gonna try leaving the driven stock and run 70 gram with the stock spring in the primary. SHould run around 8000 i hope.

after the snow flies ill see if i have to adjust anything

What altitude do you ride at. I ride 6-10K and when I had just the pipe I had to run a heavier primary spring with my 70G weights to see 8000rpm, however, mine was a 162. I have also heard that the shift assist can drop you 100-200 rpm so just ride it and see. You might just need to install a slp blue/yellow 140/310 to get a little more RPM. I would have slp install the 40/36 helix while they have it. Very worth it in my opinion.

Tempest · Sep 21, 2009

2009 M8 SP 162 SLP pipe set, CPC 70-80g weights, Cat gold primary spring, 70g weight and stock secondary yeld just under 8000 rpm at 8-10K, rider weight is 185lbs. Going to try a shift assist or a CPC secondary set up and drop a gram or two in weight in the primary(new weights) to get 8100-8200rpm.

fasta76 · Oct 12, 2009

CATSLEDMAN1 · Oct 14, 2009

m8 CLUTCHING

07 M8

153 p claw track
geared down
DD y pipe
Boss Seat
trimmed tunnel and bumper
cold air intake
all vented panels
floats all corners

73 gram cat weight ground lite tip to 69
gold cat spring
36 helix w shift assist both ends of spring BDX adjust end cap
stock cat orange secondary spring
white cap screwed in 1.75 turns vaires day to day
stock belt
ran this spring time 4000-8000 ft

fall and fluff
72 gram cat weight
40/36 helix
white adjuster about 2 turns
looking for powder traction

I have bought and sold quite a pile of aftermarket clutch parts, but try to find best setup with easy to use / cheap / avaialable parts.

07 and later series M series MUSt DO

Can obnoxious stock no adjust HELIX !!!!! has to go, go back to 05 set up or better is BDX.......both cheap, you have to have on the fly spring pressure adjustment for razor sharp clutching

SERIOUS about the hills.........gear it down.

MUST Have cold clean air intake if you ride every weekend regardless of conditions. If you choose riding days and go when its sunny and warm and just right with wife and kids........foreget this.
Gear it down

Griff · Oct 14, 2009

CATSLEDMAN1 said:
07 M8

153 p claw track
geared down
DD y pipe
Boss Seat
trimmed tunnel and bumper
cold air intake
all vented panels
floats all corners

73 gram cat weight ground lite tip to 69
gold cat spring
36 helix w shift assist both ends of spring BDX adjust end cap
stock cat orange secondary spring
white cap screwed in 1.75 turns vaires day to day
stock belt
ran this spring time 4000-8000 ft

fall and fluff
72 gram cat weight
40/36 helix
white adjuster about 2 turns
looking for powder traction

I have bought and sold quite a pile of aftermarket clutch parts, but try to find best setup with easy to use / cheap / avaialable parts.

07 and later series M series MUSt DO

Can obnoxious stock no adjust HELIX !!!!! has to go, go back to 05 set up or better is BDX.......both cheap, you have to have on the fly spring pressure adjustment for razor sharp clutching

SERIOUS about the hills.........gear it down.

MUST Have cold clean air intake if you ride every weekend regardless of conditions. If you choose riding days and go when its sunny and warm and just right with wife and kids........foreget this.
Gear it down

Catsledman1 - give us some feedback on using two shift assists. Thanks.

Icedog · Oct 14, 2009

'08 162

D&D Y-Pipe
D&D can
D&D Firebreather intake
RKT secondary running 38/36 with Speedwerx blue spring
SLP 140/310 Primary
73.75 g weights
2Cool Vents to keep everything cool
MoFlo intake vents
Geo rear skid mod

MrClean409 · Nov 24, 2009

89sandman · Nov 24, 2009

07 M8 162
primary stock spring, 68 gram cat weights,
secondary, stock spring, rock rollers, shift assist, 40/36 helix
pulls right around 8,100
full slp pipe, bdx intake, no box
40:1 premix
premium
4,500-7k
not really sure of the engagement
i'm 200lbs

Icedog · Nov 24, 2009

Icedog said:

'08 162

D&D Y-Pipe
D&D can
D&D Firebreather intake
RKT secondary running 38/36 with Speedwerx blue spring
SLP 140/310 Primary
73.75 g weights
2Cool Vents to keep everything cool
MoFlo intake vents
Geo rear skid mod

Click to expand...

Now running SLP Y-Pipe and single with D&D can.
SLP 140/300 primary spring
71.5 g weights
4000-8000'
I haven't tried this set up yet so I'll likely get spanked by everything on the mountain our first trip out.

Jeff K · Nov 25, 2009

I am running:

2009 M8 SP 153
SLP Y pipe, Pipe, Can
SLP Intake
Primary: AC Gold Spring, Culter Adjustable Weights @ 70gm
Secondary: Cutler DD Conversion with Orange/White spring (required for electronic reverse)
Stock M8 Gearing (57/63)
I weigh 210

This setup pulls 8100+ when riding 4-7000'

I will be installing BDX 54/66 gearing and a DD Lite tonight and will test it out this weekend.

echox670 · Nov 26, 2009

08' m8 sno pro 153, slp y-pipe, pipe, can, rkt 34 degree helix with green snopro spring in the center hole, stock primary with 70 gram ac wieghts, pulls hard off the bottom and am waiting for some good snow to see if it will hold 8000 at elevation. I will be taking a set off 68's just in case.

MrClean409 · Dec 19, 2009

GlennRMK · Dec 19, 2009

2009 M8 162 Sno Pro running mostly around 9000 ft

Stock with Jaws Can

70 gram light tip cat weights
Stock yellow/white primary spring
D&D torsional kit with 42/36 progressive helix and sno pro green spring

Tried stiffer primary springs and gotta say I like the stock primary spring a lot better. However, engagement is high at around 4000 RPM. Would prefer 3500 myself.

Setup is very snappy and track speed is around 40 MPH. RPM is a little high at around 7900. Could maybe use 71 or 72 grams instead.

geo · Dec 20, 2009

2010 M8 153

Stock except for -15 lbs of stuff taken off or replaced 'cause it was there. No exhaust changes yet.

105ish to 300ish primary spring (D&D white they list as 135-330).
old style cutlers (65 to 75) set at 69.4 with most in the middle but will try another .5 gr less or so.

D&D tortional modified to work with elec. reverse.
D&D purple set at 19 lbs of pull
40/36 dalton reverse type helix modified not to hit in reverse.

3250 engagement and 8000ish shift at 5000' to 6000'.

Love the new motor, just needed a bit of fuel down low and mid (shouldve been this way stock).
Love the Burant kit in the rear (should've been this way stock).
Love the OEM Floats,, revalved to Burant specs, I put on the front (shouldve been this way stock LOL).
Love the custom venting and hood lift (shouldve been that way stock).

Only thing left is the SLP pipe for a bit more run out rpm and -20ish lbs (I`ll find something else to throw away too)

Geo

xclorance · Jan 1, 2011

2008 m8

im having hard time getting peak rpm on my sled, most of my riding is right around 6000ft, right now im hitting 7850-7900 rpm (needs to be 8100-8200) i have slp pipe, slp intake and im running there mtx weights and 40/36 black dimond helix/ 71 grams with a 3 gram rivot in the tip. should i take the 3 out and replace it with 1 or 2 gram rivots?? help me out please

fasta76 · Jan 1, 2011

Sled year.... 07
Track....162 Powerclaw
Rider weigh...240 with gear and gas
Altitude......5000-7500
Mods.... SLP Pipe,porting,airbox,powercomander
Primary spring......SLP Green/Yellow
Weights..............MTX 74g With 2g in outer hole
Secondary spring...... Stock Orange/White
Helix..................42/36
Gears..............Stock
Peak RPM..........8150-8200
General thoughts about the performance.

Love the way it runs with the porting!! Whole different machine over just the pipe!!!

M8 clutching setup list - post your setup

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