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Can't pull rpm with the common setup

racerdave

racerdave

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1,087
Age
69
Location
Will County, Illinois
Country
USA
Years Snowmobiling
since 1976
Snowmobile
AXYS Switcher 800,Indy600sp,XCSP600ves
120/310primary, 10-70 weights,, 48-44f helix, 120-200 secondary, 23 40 gears. New broken in Gates. Can't pull over 7950. Last year all oem clutching and gearing or a 120/310 only change never a problem. 8,200 allways. Only other weights I have now is the oem 10-66. Went to install them and all my ground down wrenchs and sockets are 360 miles away. Still scrounging for tools that I have triples of back home.
 
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Had the same problem with my INDY on the weekend. Tried lighter weights and didn't get the RPMs. Changed from a 120 finish to a 140 and got up to my 8200
 
I did just change the weights back to the oem 66's. Not sure If I'll go out yet today or tomorrow morning.
 
racerdave said:
120/310 10-70, 48-44f 120-200 23 40 gears. Can't pull over 7950. Last year all oem clutching and gearing or a 120/310 only change never a problem. 8,200 allways. Only other weights I have now is the oem 10-66. Went to install them and all my ground down wrenchs and sockets are 360 miles away. Still scrounging for tools that I have triples of back home.
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What weights where you first trying?
 
that's a pretty heavy setup for a stock piped sled !
 
Dave, I'm thinking your secondary spring is a bit on the light side. Find yourself a 140/220 or a 155/222 and keep the 10-70's in place. These 800's love the weight. I personally am running the SSI adjustable weights with a total of 71.4g, which puts me right at 8200 all day long on a stock motor, stock exhaust sled. Changing your secondary spring to a higher rate should raise your RPM's into the sweet spot.
 
racerdave said:
It in there. 10-70's
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I see it, series 10. I have the same set up except 50/44 w/140/200 and cutler tm weights. Thing rips, lot of track spin in the trails, switched to 155/222 and stopped the spin. Turns 8250 8300 with the 155/222. Was quicker (by seat) with 140/200 so im gonna try 140/220. I was gonna modify my series 10 but if your not having luck maybe I wont.
 
See these motors don't seem to like one setup across the board. Flasch says to much weight, Bravo says more secondry spring finish. I believe Brock and Dr notadoo have suggested this setup, but I am not claiming they have.
 
racerdave said:
See these motors don't seem to like one setup across the board. Flasch says to much weight, Bravo says more secondry spring finish. I believe Brock and Dr notadoo have suggested this setup, but I am not claiming they have.
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More secondary helped my r's to come up, but I need more, I need more tip weight, im gonna try stiffer primary and add tip weight. If it don't work ill go back to 140/220. It ripped
 
Having the exact same problem. Pretty much same setup except 140/240 secondary spring. 7950-8000 rpm. Last year 8250 all day long. Thinking of grinding the 10-70 weights to 68 grams
 
Who told you guys a stock piped 800 would pull this clutching ?
 
Mark 28 said:
Having the exact same problem. Pretty much same setup except 140/240 secondary spring. 7950-8000 rpm. Last year 8250 all day long. Thinking of grinding the 10-70 weights to 68 grams
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On this site, I have this set up but seems im the only one with cutler turbo mag weights. At 65 g (nothing in the hole) it has a real good holeshot. Runs way better than stock.
 
racerdave said:
120/310primary, 10-70 weights,, 48-44f helix, 120-200 secondary, 23 40 gears. New broken in Gates. Can't pull over 7950. Last year all oem clutching and gearing or a 120/310 only change never a problem. 8,200 allways. Only other weights I have now is the oem 10-66. Went to install them and all my ground down wrenchs and sockets are 360 miles away. Still scrounging for tools that I have triples of back home.
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I no mine would only pull 10/68's with similar set. 8200 on the head
 
flasch192 said:
And what did you do too fix it ?
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I didn't say there was something wrong with it. I ran it like that all last year and it ran strong. We have two axys' neither would pull 70's and a 310 finish spring. What works for one doesn't necessarily work for everyone! Jmo
 
1fastxc7 said:
I didn't say there was something wrong with it. I ran it like that all last year and it ran strong. We have two axys' neither would pull 70's and a 310 finish spring. What works for one doesn't necessarily work for everyone! Jmo
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Oh ok I thought you were having a problem this year , my bad ..
 
Rd,
What's your gear ratio again? This has a huge part in every

I would try a slp 130/310 cat spring with your 70 gram.
Put a 140/220 spring in secondary.

If your still not pulling 8250 rpm. Grind .5 grams off side of weight and try.

10 series are good. I just don't like the light tip on them .
 
23-40 gears. These weight have been balanced to 70.2. 70's are a little harder to balance than the 66 and below as they don't have the raised sides. The 66's are back in for now and will probably stay for the rest of this trip.
 
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