High altitude clutching

assaultcbco · Dec 21, 2009

I have a 09 Assault and the clutching has never been right. NEVER! I am fed up with the local dealer and I need advice. What do I need to change on my clutch to make this machine work correctly? The clutch gets so hot that it will burn me. I am going through belts and the sled wont climb like it should. I ride from 9000 - 12000 feet. Whats the formula? Thanks guys

skibreeze · Dec 21, 2009

Increasing your IQ has a ton of info for you.

http://www.snowestonline.com/forum/showthread.php?t=128754

Jonny · Dec 23, 2009

19T top gear
42T bottom gear

60g or 62 g weights

CO 2.0 · Dec 23, 2009

I run 9-12K ft all the time. Mostly 11-12K. My clutching blows. It runs fine on flats at 8100rpms, but on any climb in powder rpms are anywhere between 7500-7800rpms usually. I run 10-58 weights with stock helix, stock springs, 19/42 gearing. I've tried Ron weights and a 56 helix but it didn't help the drop in rpms up top on a climb.

Same issue on my edge rmk, runs 8K rpm on flats and 7500 on deep steep climbs. It has Almond round, red/blk, 10-58, 19/42 gearing, stock 58 helix. Tried 64/40/.46, blk/red, and 10-60 combos in it to no avail.

Running out of ideas and now thinking of dropping my gearing to 19/45...I really want to run a heavier weight than a 10-58.

milehighassassin · Dec 23, 2009

You are going to need to increase the weights in your clutch. I am "thinking" my 2009 Assault has 64 gram weights, not positive. I think I have a set of 10-62 sitting on my table at my house that were taken out. I'll try to find out today.

Ron · Dec 23, 2009

Lighter weights won't shift out so going lighter isn't the answer. At elevation you need a helix with a finish angle of 40 or maybe even 38 vs the stock 42. You might try the Team LW520117-it has two good cuts for high elevation...60-40-.36 and 60-38-.36. Or if you can't get that one then the LW420486 that's 60-40-.46 and 60-38-.46.

thefullmonte · Dec 23, 2009

Don't be afraid to throw more spring pressure at your team secondary either. You would be surprised how well a black/silver 160-280 works. Your secondary looses a lot of side pressure the further you shift out so in conjunction with less helix angle you may want more spring pressure too. More pressure = less slippage = more consistent RPM =

.

CO 2.0 · Dec 23, 2009

Lots of good info, thanks for the PM Ron!

Will probably add more weight on the primary, then try a 60-38.36 helix with SLP Blue Pink primary and black/silver secondary.

TEC800 · Dec 23, 2009

Depending on your clutching ability or if you just want to do it the easy way just call Carls Cycle and get a kit from Chris. They may leave a little left on the table but I think they are pretty close, especially for how easy it is to just throw their kit on it. Have always pulled 8350 RPM on climbs with 19/42 gearing. If you like to figure it out on your own I get that, too. Just a thought

milehighassassin · Dec 26, 2009

The clutch weights that were removed from my 2009 were 10-62. I was told by the prior owner that the new weights are heavier.

So that might help a little.

crider · Dec 26, 2009

CO 2.0 said:
I run 9-12K ft all the time. Mostly 11-12K. My clutching blows. It runs fine on flats at 8100rpms, but on any climb in powder rpms are anywhere between 7500-7800rpms usually. I run 10-58 weights with stock helix, stock springs, 19/42 gearing. I've tried Ron weights and a 56 helix but it didn't help the drop in rpms up top on a climb.

Same issue on my edge rmk, runs 8K rpm on flats and 7500 on deep steep climbs. It has Almond round, red/blk, 10-58, 19/42 gearing, stock 58 helix. Tried 64/40/.46, blk/red, and 10-60 combos in it to no avail.

Running out of ideas and now thinking of dropping my gearing to 19/45...I really want to run a heavier weight than a 10-58.

Co2.0 I got 09 d8 68 mtx weights, green pink primary spring, and 18/42 gearing. Tried a 64/40.46 healix with stock black purple sec. and pulled 8400 on flat and 8300 on hill, but have not climbed that much with it yet. Went with the 18 top tooth so did not have to change chain, and pretty close to 19/45 gearing. going to try a 60/40 healix if I can find it I was sure I had one. (elv. was around 9500 feet)

AKSNOWRIDER · Dec 26, 2009

crider said:
Co2.0 I got 09 d8 68 mtx weights, green pink primary spring, and 18/42 gearing. Tried a 64/40.46 healix with stock black purple sec. and pulled 8400 on flat and 8300 on hill, but have not climbed that much with it yet. Went with the 18 top tooth so did not have to change chain, and pretty close to 19/45 gearing. going to try a 60/40 healix if I can find it I was sure I had one. (elv. was around 9500 feet)

do you have delrins in the secondary? they help with both upshift and backshift....amazing the difference in performance with just a couple hundred rpm...huh...

crider · Dec 26, 2009

Ya put in three derlin washers. one on each side of spring and one under cup. Thanks for all the great info aksnowrider. Hell ya that extra 200 rpm makes all the diffrence.

spudy · Dec 26, 2009

I have an 09 D8 clutched completely stock, always has pulled around 7900 to 8000 rpms, which would be a better investment new clutching or a powercommander? It has always run perfect, no bogs or hiccups.

Thanks for any advice!!!!

AKSNOWRIDER · Dec 26, 2009

spudy said:
I have an 09 D8 clutched completely stock, always has pulled around 7900 to 8000 rpms, which would be a better investment new clutching or a powercommander? It has always run perfect, no bogs or hiccups.

Thanks for any advice!!!!

Spudy, thats a hard choice, I have heard that putting the powercommander on is like adding the slp pipe all over again...(I dont have the PC on mine)the clutching when right is night and day above the slp single in my opinion...I dont have an answer for you..hopefully some others will chime in here...

theultrarider · Dec 26, 2009

spudy said:
I have an 09 D8 clutched completely stock, always has pulled around 7900 to 8000 rpms, which would be a better investment new clutching or a powercommander? It has always run perfect, no bogs or hiccups.

Thanks for any advice!!!!

My vote would go for the clutching since yours has always run perfect. The extra hp from the pc might get you your missing rpm, but if it runs great, I'd leave it alond and get the r's with clutching.
Just my opinion....

Kraven · Dec 26, 2009

Delrin washers

crider said:
Ya put in three derlin washers. one on each side of spring and one under cup. Thanks for all the great info aksnowrider. Hell ya that extra 200 rpm makes all the diffrence.

Regarding DELRIN washers, SLP 2010 Catalog suggests ONE DELRIN ONLY, UNDER the Spring cup.

ElectroTech · Dec 27, 2009

Team Black/White 160-260 works well for the assault, needs a little more spring to slow the secondary shift, because of the track. Team lime green primary will help a little to get that heavy azz track movin at high altitude.

spudy · Dec 27, 2009

thanks for the advice, I eventually want the powercommander, but probably will look at clutching first!!!

AKSNOWRIDER · Dec 27, 2009

Kraven said:
Regarding DELRIN washers, SLP 2010 Catalog suggests ONE DELRIN ONLY, UNDER the Spring cup.

yes, I know they do..Jim and I had along chat about it before I did it..there is 3 for a reason....:beer;

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