Primary roller failures

[jonlafon1]

66-67 grams for over 11k. 45 helix. Original Yamaha clutch with 911 cover. Heavy hitters. I’m not sure I even know what roller problems are. Sorry just not seeing it. I run 8800-9000 up top. TP ORANge @ 6/3. I personally think it’s heavy weights and or binding of the primary that causes issues. Actually caught a secondary roller that was cracking at the end of last season. At 6/3 TP oranges and a 45 degree I bet those rollers get a real hard press!

 

[NYTurbo]

66-67 grams for over 11k. 45 helix. Original Yamaha clutch with 911 cover. Heavy hitters. I’m not sure I even know what roller problems are. Sorry just not seeing it. I run 8800-9000 up top. TP ORANge @ 6/3. I personally think it’s heavy weights and or binding of the primary that causes issues. Actually caught a secondary roller that was cracking at the end of last season. At 6/3 TP oranges and a 45 degree I bet those rollers get a real hard press!

How's your acceleration with the 45 ?

 

[jonlafon1]

How's your acceleration with the 45 ?

I don’t have the equipment that most of you guys have. But I would say extreme. Running 200+ 1.450 gold diggers. I hooks like insane. I know it’s not a great example but this last Saturday at bents I ran 105 in 1000 feet. 270 tune. Snow track. Not even close to hard pack. I don’t have anything else except others that rode it said WTF that’s insane. The skis float a long ways on hard pack.

 

[Thunder Products]

The more aggressive weights aren't hurting the rollers.... like the longer, heavier, flatter profile weights. Just got a SW clutch in for rebuild and the rollers are stuck and shot.

The previous style clutches aren't going thru rollers.

 

[jonlafon1]

Big factor for roller failure is proper maintenance . If a roller starts to egg out the bushing and if you don't catch it right away or within a short time it will multiply and magnify its level/pace of failure. Big power= more checking of clutch parts.. I understand everyone wants to "gas and go".. Its just not possible on sleds pushing 200+ HP.. If your boosted and tuned you cant get away with "gas and go" ..

 

[KnappAttack]

Big factor for roller failure is proper maintenance . If a roller starts to egg out the bushing and if you don't catch it right away or within a short time it will multiply and magnify its level/pace of failure. Big power= more checking of clutch parts.. I understand everyone wants to "gas and go".. Its just not possible on sleds pushing 200+ HP.. If your boosted and tuned you cant get away with "gas and go" ..

Typically that is true, but honestly I've been guilty of not even checking the belt and rollers anymore since I've gone to RX-1 primary and heavier secondary pressure. I've been gas-n-go this season.

And for your info Jon, I have been helping a nice young fella with TP clutching and have cranked his orange secondary spring up to 90* wrap on the stock 35-39 helix as well. If its set any lower it won't MPH decent, slips and blows belts. Everyone thinks the orange is so heavy, but its not really, on my drill press scale it has the same low and high pressures as the Dalton B/O set at the same 90* wrap. If they are not cranked up like that they just slip even on the XS825 belt. He was trying to run it between 40 and 60 degrees and it just wasn't enough side pressure. I don't even check the belt heat any more either as I feel they are in the best possible place we can set them for pressure in the drill press scale. Any lower they just slip, any more it's just too much pressure. Thought you'd be interested to know that because you've always ran that spring at 90* as well. I was happy I finally got a chance to scale that spring.

 

[jonlafon1]

Great info Mike .. Thanks

 

[blevis213]

Typically that is true, but honestly I've been guilty of not even checking the belt and rollers anymore since I've gone to RX-1 primary and heavier secondary pressure. I've been gas-n-go this season.

And for your info Jon, I have been helping a nice young fella with TP clutching and have cranked his orange secondary spring up to 90* wrap on the stock 35-39 helix as well. If its set any lower it won't MPH decent, slips and blows belts. Everyone thinks the orange is so heavy, but its not really, on my drill press scale it has the same low and high pressures as the Dalton B/O set at the same 90* wrap. If they are not cranked up like that they just slip even on the XS825 belt. He was trying to run it between 40 and 60 degrees and it just wasn't enough side pressure. I don't even check the belt heat any more either as I feel they are in the best possible place we can set them for pressure in the drill press scale. Any lower they just slip, any more it's just too much pressure. Thought you'd be interested to know that because you've always ran that spring at 90* as well. I was happy I finally got a chance to scale that spring.

Is the higher wrap because of the steeper helix? I have a 2021 srx and i've got 117 on speedo. My bud has a 2021 gt ltx and hes only getting 109 on speedo. Both clutched the same with 58 hh orange primary and orange secondary at 40 with dalton 33-35. Rpms are 8700 but i thing more miles rpm will come up. Offset at 58 both sleds about 200 miles. Either one having no issues just want to understand your findings better. Thanks no tunes yet but after season both sleds getting 250 tunes.

 

[fatchance]

That 1" track will be faster than the gt. How about rider weight? Both studded the same? Helix is just your own preference in riding more than anything.

 

[KnappAttack]

Is the higher wrap because of the steeper helix? I have a 2021 srx and i've got 117 on speedo. My bud has a 2021 gt ltx and hes only getting 109 on speedo. Both clutched the same with 58 hh orange primary and orange secondary at 40 with dalton 33-35. Rpms are 8700 but i thing more miles rpm will come up. Offset at 58 both sleds about 200 miles. Either one having no issues just want to understand your findings better. Thanks no tunes yet but after season both sleds getting 250 tunes.

Because it won't MPH, slips and blows belts if we don't wrap it up with that helix. This is on a 146 sled with a 2" paddle track and 280 tune setup. Going to be different on your stock sleds for sure.

 

[blevis213]

That 1" track will be faster than the gt. How about rider weight? Both studded the same? Helix is just your own preference in riding more than anything.

He weights 40lbs more than me. We both have 192 but I have doubles and singles he’s got singles.

 

[fatchance]

1 inch lug and he's spotting you 40lbs. There ya go.

 

[fatchance]

Give them a chance to break in some more.....(hopefully you didn't go by the book) and those RPM will come up and you'll get more speed in perfect conditions

 

[blevis213]

I broke mine in hard from first mile. My buddy was kinda babying it and I told him to start getting on it. I let him ride mine for about 20 miles so he can see how the thunder kit was and while I was on his with stock clutching I was getting on it. He now has thunder. I knew with the weight difference of him to me and track would make alittle difference. He’s happy as hell I’m the one that’s wondering since I put both kits in. Thanks

 

[SideHogger]

The more aggressive weights aren't hurting the rollers.... like the longer, heavier, flatter profile weights. Just got a SW clutch in for rebuild and the rollers are stuck and shot.

The previous style clutches aren't going thru rollers.

Are you doing anything to the previous clutches besides just bolting in weights and on sled?