136 viper clutch/gear setup needed

J

j.e.1975

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Mar 27, 2007
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39
Age
49
Location
ontario, canada
I have an 04 viper er with a 136" 1 1/4" track, 144 studs, stock 9 tooth drivers, stock gear, stock primary and a 53/43 with a green spring in the secondary. I bought this last spring an haven't drove it yet but I know this is not the right setup. I need some info for gearing and clutching with both an 9 tooth and 8 tooth setup, not sure if I have to change the drivers yet. Driving is both on and off trail, lots of lake.

Thanks in advance for any info, when I confirm a proper setup I will report back.

j.e.1975
 

I wish I could help you more on this as I am just about to 136 my Viper too. I have been told that I will need to go 1 tooth smaller on the upper gear. Let me know how you make out. By the way, where in Ontario are you? I am from the Hamilton area.
 
I 136" 'd my 02 viper last year. When it was 121 with stock track the clutching was HC 40-10's with 3g heel and 4 g tip red hc spring and 48-40 Advatage secondary helix @ 70. With the 136 1-1/4 ripsaw all I had to do to stay in my rpm ramge after getting the rack stratched and it set in was remove the 4g tip and it was back to the same. People tell me it was weird that I should have had to do more. It worked gets the same mileage and drives almost the same(just floats way better) So my thought is try it and then go from there.
 
Turk
From what I've read on here and from my own clutching experience the 136" should pull the rpm's down too much in some deep snow. You are right, I don't know for sure as i haven't drove the sled yet.

kirkswim
Except for the clickers and helix is the rest of the setup stock? What rpm do you run on the hard pack and also in a foot of powder? From what I've read that 48-40 advantage should be close to my 53-43. Thanks for the info and I'd like to see some more setups.
 
wantsnow said:
I wish I could help you more on this as I am just about to 136 my Viper too. I have been told that I will need to go 1 tooth smaller on the upper gear. Let me know how you make out. By the way, where in Ontario are you? I am from the Hamilton area.
Click to expand...
wantsnow
I'm from Alliston just south west of Barrie.
 
I'm putting a 136" on my sled this fall.I have talked with Bruce at tracks usa and he says I should'nt have to change anything from my current setup.He said I should'nt even have to gear down which I find questionable.Bottom line is he said to try it first before you just start changing to see where you are which would have some merits to it so thats what I'm gonns do, his way to start is cheaper too!
 
I used to sell Polaris sleds and one thing I remember about a standard 121" and a switchback 144" was that they were both geared the same. Thats what the Polaris engineers told us. I just 136"ed my viper and am not planning on gearing. I do have it piped and have a clutch kit installed. Just my 2 cents.
 
j.e.1975

sled is all stock motor, has 4th wheel kit and marginal snow wheels. I am running the norrower hifax(sold on some of the late 90's sleds)

I engaged at 4200 and top out at 8600(stock exhaust) any temp and any amount of snow(packed to powder) with stock jetting.

I tried it with a MBRP can and top rpm dropped to 8100, 2 layers of exhaust header wrap on the can and back to 8600rpm once warmed up.
 
It will be fine if you dont gear it down, but if you ride off trail in deep snow a lot the clutches will run a lot cooler with lower gearing because it is a lot easier to pull lower gears. If you ride mostly trails just leave it stop or gear down one on top. If you go off trail a lot, go down 1-2 teeth on top. If you can afford, go down one on top and up one on the bottom. Clutching you will not be able to setup until you try it out.
 
Thanks for the info guy's. I will try it the way it is and fine tune with gear and weights if needed. I will report back later this winter, my buddy has a stock viper s so I can give a comparison.

Thanks
j.e.1975
 
I've run 136" M10 with 1 1/2" camoplast paddle on 99 SRX 700 for the last 4 years with HC 40/10 and stock gears. Wicked fun on flats but did seem to bog a touch in the deep pow - Converting to 151" now and am changing gears to 42/21
 
yam apex91469

I expect I might need to drop one tooth on the top gear. You aren't the first to complain of the bog in the deeper snow. For sure the harder shift of the clickers and the 1 1/2" track over the stock weights and a 1 1/4" track would pull the motor a bit more. We will have to see when the snow flies. I would like to hear of some more setups that did work well. Oh ya, did I mention this is my wife's machine and she hates to get out run. This will be the slowest sled she's had since the old indy 500.

thanks
j.e.1975
 
I just talked to Tom Hartman this afternoon at Hartman Inc., what a super guy.He says to most definetely gear down and it'll just work better in general and even pull better top end seeing these sleds are geared so tall from the factory.He says you want about 1.95 ratio on these sleds with a 136" track, which I believe is going down 2 on the top and a 68 link chain.Doing what Yamahaulic suggest lastly in his post comes out to 1.90 ratio if I'm correct which is still in the ballpark.Tom out there is super knowlegable and willing to help, even if you don't buy an entire setup from him.
 
Thanks Swede
This is the type of info I'm looking for. I'm new to the Yamaha game and don't yet know all the players. I should probably reword the slowest sled bit. I know the viper isn't slow but with the 136" it won't be as fast on the lake as the wife's previous couple sleds.

thanks again
j.e.1975
 
SWEDE said:
I just talked to Tom Hartman this afternoon at Hartman Inc., what a super guy.He says to most definetely gear down and it'll just work better in general and even pull better top end seeing these sleds are geared so tall from the factory.He says you want about 1.95 ratio on these sleds with a 136" track, which I believe is going down 2 on the top and a 68 link chain.Doing what Yamahaulic suggest lastly in his post comes out to 1.90 ratio if I'm correct which is still in the ballpark.Tom out there is super knowlegable and willing to help, even if you don't buy an entire setup from him.
Click to expand...


if you run 8T drivers vs. 9T, make sure you take them into consideration when determining your gear ratio. I just went thru this today and ordered a set of gears from Mountain Performance. They have a nice chart in the "gears and chains" section that shows all the top gear/bottom gear/driver combinations. Tom Hartman can also help with this
 
136" viper update
We have lots of fresh powder right now. I had the sled out this week for the first time, runs good. Everything is stock except the 136" and the 53-43 helix. The secondary was set at 70 deg. had to wrap it to 100 deg. Other than that it runs strong with the stock set up. I'll report the rpms when I get out again.

j.e.1975
 
100 deg. wrap is too much. The reason for the tight wrap was at 70 deg. the secondary would just shift open under load in the powder and the belt would slip. I have since serviced the clutches and cleaned the belt so we'll try less preload. It would hit 9000rpm with the tight preload so I know I have to get it down. Does anyone have a suggestion on a spring witch is stronger belt sqeeze but no more preload.
j.e.1975
 
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