23 Tooth top gear - HCS Snowmobile Forums

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Old 10-09-2009, 07:26 PM   #1 (permalink)
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I have a 07 apex gt with a 121 inch track. Stock top gear was a 24 tooth and i want to do a 23. My question is am i going to have difficulty getting traction on a hard trail? I have 144 power point studs in it and i am wondering how badly i would lose traction compared to the 24 tooth. Any information is appriciated!
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2007 Yamaha Apex GT - SLP straight line tracking skis, 13mm sway bar, pioneer performance clutch kit, pioneer performance revalved ohlins, big boy spring, 144 stud boy power point studs, cr10ek ngk plugs, 4th wheel kit, marginal snow wheel kit,23 tooth top gear, more to come...

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Old 10-09-2009, 08:48 PM   #2 (permalink)
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I think you will improve your down low performance, you are going from 1.58 ratio to a 1.65, if you are keeping the 38 tooth lower gear and 70 link stock chain. You will scrub a little off your top end.
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Old 10-09-2009, 10:07 PM   #3 (permalink)
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I dont mind the loss with top speed. I want it to pull harder off of the corners. What i am asking is with the better low end performance, how much more is it going to want to spin?
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2007 Yamaha Apex GT - SLP straight line tracking skis, 13mm sway bar, pioneer performance clutch kit, pioneer performance revalved ohlins, big boy spring, 144 stud boy power point studs, cr10ek ngk plugs, 4th wheel kit, marginal snow wheel kit,23 tooth top gear, more to come...

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1999 Dodge 2500 Cummins Turbo Diesel, QCLB, 4" straight pipe, cold air intake, chipped...

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Old 10-12-2009, 05:27 PM   #4 (permalink)
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Quote:
I dont mind the loss with top speed. I want it to pull harder off of the corners. What i am asking is with the better low end performance, how much more is it going to want to spin?[/b]
That will depend alot on your track and snow conditions, As you are already studded, how tall is your track height, Ripsaw ,Hacksaw, Cobra? Studded tracks will aways hook better down low than nostudded and will benefit more from the reduced upper gear, but the trade off is more track weight (top end) and more push going into the corners (longer carbides). The apex has lots of torque all through the power band, so loose snow or a pounded trail, I would expect more spin, but on hard pack that should translate to more go! The gearing on the 09 Apex rtx is 22/38 with a 68 link chain a ratio of 1.73. So in Yamaha's thinking, you are going in the right direction. Hope this helps.
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Old 10-12-2009, 09:57 PM   #5 (permalink)
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Going to the 23 tooth is what many apex owners have done. My 06 attak came with 23-38 gearing and the best speed on really good hard pack and some ice is 128 on the dream meter. But for this year I put on extrovert drivers and a cobra track with 162 studs. So Iam going to loose a little on the top end but at least I will be able to go in soft snow.
You can either go with a clutch from Ulmer racing or super torquer both are very good.
Hope this helps some.

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Old 10-13-2009, 05:45 AM   #6 (permalink)
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Quote:
I have a 07 apex gt with a 121 inch track. Stock top gear was a 24 tooth and i want to do a 23. My question is am i going to have difficulty getting traction on a hard trail? I have 144 power point studs in it and i am wondering how badly i would lose traction compared to the 24 tooth. Any information is appriciated![/b]
You wont lose any top speed,i fact you will increase all speeds,including top speed,as the 24/38 geared ratio is way over geared for most sleds with 150 hp,if you were boosted to at least 230 hp you would be ok to stick with stock gearing,we have been playing with these gears for some time now,and with the stock ripsaw 1.25 and normal 96-144 studs you will be fine.
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Old 12-19-2010, 03:29 PM   #7 (permalink)
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so what gearing would you recommend for a bender turbo 136 rx1 cobra track no studs?
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