totally confused

[akViper907]

I hate buying a sled that the previous owner has no clue about the stuff that was done to it. This guy would just take it to the CAT dealership and have them do stuff and not even know what they did. Anyway, he told me that the drive shaft broke last year and he had a new one put in as well as all the llower bearings etc etc. He also said that cat called him to tell him that a few teeth on the lower(big)gear were missing and that they put a new lower gear on. He said they put a 44 tooth gear on. Well today while looking inside the case I counted the lower gear and its only a 39 tooth!. I was really hoping that it was a 44 tooth for low end torque and climbing, I have no need for above 65-70 mph speeds. I called the dealership and they have the service record for the repair. They confirmed it was a 19/39 gear set up and they also said they put in 10t drivers and brought the track pitch lower so it would attack the snow at a better angle???. The previous owner said the machine pulled like crazy and had awesome low end grunt, a couple buddies that I know that rode the machine before I owned it said that it was a monster. I'm concerned about the gearing now as 85% of my riding involves deep snow and valleys and hills. I'm real tempted to order 20/46 gears and go HYVO, but I've never even ridden the sled, maybe I will like it, everyone else I've talked to said it was a monster to ride as it sits. OPINIONS???

 

[Arctic Thunder]

You should try it as it is. I think you might be geared a bit high. But I have also found that by gearing it way down you don't build the track speed. I have always geared down trying to cool the clutches down. But when doing this you cool the clutches because you aren't putting it to the ground. So I would try and run the tallest gears you can pull without generating a lot of heat.

19:43 with 9 tooth drivers was stock.

You would need to have 17:43 to get really close. 17 is ugly on top so you would need 18:44 to be close and 19:44 would be a bit taller but close to the stock setting.

But I would run it and see how it was clutched and how it pulls first.

Here is a chart I put together quick.

Travel/input/Rev
Gear1 Gear2 ratio Driver Teeth Pitch Inch/rev
19 43 0.441860465 10 2.52 25.2 11.13488372

19 39 0.487179487 10 2.52 25.2 12.27692308

19 43 0.441860465 9 2.52 22.68 10.02139535 Target

19 39 0.487179487 9 2.52 22.68 11.04923077

Options
19 44 0.431818182 10 2.52 25.2 10.88181818

18 44 0.409090909 10 2.52 25.2 10.30909091

17 43 0.395348837 10 2.52 25.2 9.962790698



Thunder

 

[KMMAC]

What type of snow do you ride most? If it's wet powder then 2.26 gear ratio works well. I wouldn't go to an 18 tooth because of the tight rap around the top sprocket tends to wear out the chain faster. From what I've been reading on here definitely go with the hyvo chain. Think you have to use the same gears to match,,,Poo. Looking to buy one of these myself,, after MUCH! deliberation, just haven't picked one out yet.

 

[akViper907]

hey

I live in Alaska and I'd say the conditions change daily up here, dry pow to wet snow, you just never know. I'm just gonna run the sled and see how I like. Atleast If I decide to go HYVO and some 20/46 gears I'll have something to compare against.

 

[76FOMOCO]

is this sled a early build?

 

[spomey]

I put on a 19/45 (about 10% lower geared than stock) and it really pulled hard off the bottom, the top speed was limited but I never really got to the point of clutching out. if your looking for a climbing machine this really works!

I have the 45 for sale if your interested, I did alot of motor work and add ons and a 20/46 about (5% lower than stock) was recommended so I bought that setup. the 45 tooth has about 6 rides on it.

spomey