Gearing up or heavier weights?

zr600 · Dec 28, 2009

I have an 04 800efi mountaincat. I had it all set up with a 159 track with the stock 10tooth drivers. I let my buddy talk me in to putting on a 162 x 16 maverick we put in 18 44 gears and now im getting way to many rpms. Would i be better of to gear up or add heavier weights? Wish i would have just keep the old 159 it climbed better with that track, but im wondering if that has to do with the gearing and clutch setup now. When i first bought the sled it had a 151 then i put on the 159 didn't touch the gearing or clutching and it pulled it fine. What are all your guys ideas/ tips?

Arctic Thunder · Dec 28, 2009

I put a 162x16 extreme on my 03.5 900.

IMO I would go with 19/43 gearing and load the motor up.

What helix are you running? I am running the stock gearing, 66 gram weights Fixed pin primary, stock yellow green primary, red secondary spring and a 49 degree helix. Holds the R's all day long.

I think with your gear ratio you are stuck in first gear all the time. Time to up shift.

Thunder

Arctic Thunder · Dec 28, 2009

KMMAC said:
Do you have a lesser angle helix lying around? If you have 53, try a 51 or 49. This will slow your back shift some but you can compensate for that by putting more twist in your spring. This will let it shift out faster. You probably knew that though.

Sorry but I think this is back-wards. The 49 with a softer spring will back shift much faster than a 51 or a 53. If you want more R's and can't hold them on a climb then drop down on the helix. Otherwise if you can pull the R's keep the helix angle higher. So if you are over reving you could go to a steeper helix like a 51 or even a 53. They may have come stock with a 55.

Thunder

Rixster · Dec 28, 2009

Weight baby through as much weight as possible on that clutch. more weight = harder pull.

Arctic Thunder · Dec 29, 2009

KMMAC said:
I always thought that the steeper the helix the slower they shifted? Been off the snow too long!

Hey, no big deal. I am glad to see everyone willing to help out. I know we all have ideas that sometimes can lead in the wrong direction. But 99% of time are dead on.

I am sure your help and others will always be appreciated.

Thanks

Thunder

kidrman · Dec 29, 2009

Arctic Thunder is right on the helix.

I have the same 04 800 with the same gearing only using 8 tooth 3 pitch drivers and a 156 x 16 camo extreme. Throw some weight at it and go to a multi angle helix with a shallow start and it will upshift very well. I currently run a 55-50 with good results.

KMMAC · Dec 29, 2009

same

Arctic Thunder said:
Hey, no big deal. I am glad to see everyone willing to help out. I know we all have ideas that sometimes can lead in the wrong direction. But 99% of time are dead on.

I am sure your help and others will always be appreciated.

Thanks

Thunder

Thanks Thunder ya, like I said, it's been a while.

zr600 · Dec 29, 2009

I'm pretty sure mine are the 8 tooth 3 pitch drivers now.

2zeros · Dec 29, 2009

More weight, definatly............

Only two things make a clutch shift out. More weight, or more rpm's. The rest is tuning, how it shifts here, or there. Good Luck -00's

zr600 · Jan 11, 2010

Here is the setup i have in the clutchs now and was reving about 500pms to much. Primary yellow/white with 616-66 cat weights, sendary green sno pro spring in sevcond to loosest hole and a 53 degree helix. It has always worked good before i changed the gearing and the track. If i pulled a camo 159x15x2" lugs would i pull the 162x16x2.25 with the same gears and clutching as the 159? Or should i just add weight? How many grams if i just add wegith?

zr600 · Jan 12, 2010

Well 1100 cat sent me a pm with a lot of good info. So i decided to gear it up from what i had it at. I had 18 44 which is a 2.44 gear ratio so i put in a 20 45 in which is 2.25 and 19 43 which is stock is 2.26 so i should be a little closer with this. I had in originally a 20 43 which is 2.15. So i think this should work pretty close i guess i'll see this weekend going to cooke on thurs. Thanks for all the help if you have any more comment go ahead and post them still.

1Mike900 · Jan 12, 2010

It should work pretty darn good! I have the same gears 20/45 on a 900 and I can spin the hell out of a 151! I was told to keep close to the stock gears as the engine makes torque. If the belt stays in the middle of travel as close as 1:1 gearing the better. Too low and the primary will be toward the top and secondary too low for grip. Also he said it puts unnecessary side load on the crank when working it hard in the deep, More leverage being applied further out on the clutch faces. Then with the lower gears I would have too change the whole clutch set-up, That would be a bummer!

Mike

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Gearing up or heavier weights?

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