Primary roller failures

[vmxrdr]

Knapp recommended going to older style primary we finally made switch after at least 1500$ worth of rollers in a 17 winder with ms17 and a paddle track. I admit I was skeptical, we made zero changes to the used apex primary except new thunder rollers and moved the winder spring over. It’s a miracle just like Knapp said, he has been riding a lot with our great conditions here in central Ontario with zero issues. Thousands of kms on rollers now, old winder primary was eating a set in one hard day. I may try sourcing a new apex clutch for mine from US supplier, pricey up here in Canada

 

[SideHogger]

Knapp recommended going to older style primary we finally made switch after at least 1500$ worth of rollers in a 17 winder with ms17 and a paddle track. I admit I was skeptical, we made zero changes to the used apex primary except new thunder rollers and moved the winder spring over. It’s a miracle just like Knapp said, he has been riding a lot with our great conditions here in central Ontario with zero issues. Thousands of kms on rollers now, old winder primary was eating a set in one hard day. I may try sourcing a new apex clutch for mine from US supplier, pricey up here in Canada

I have done the same. Switched to Apex primary and all is good! I wasn’t having any problems with the Sidewinder clutch but just didn’t want to chance it. It does rattle like a bucket of bolts down low but once above 15 mph my exhaust takes over!

 

[DMCTurbo]

Here's my thoughts. I did not have roller issues until this year. What changed? The last few years I ran Ulmers primary spring with daltons maxing weight out around 75 grams depending on the tune. This year I've went to heavier primary springs and heavier weight @ 85 grams in DTYA2s.

I've made 45 1/4 mile passes this year and a 140 km trail ride and my TP rollers are toast.

 

[jonlafon1]

It’s the heavier weight. I understand guys want to clutch that way, but realize you are going to need rollers if loading weight like that(on stock primary)Pretty sure DMC post proves it. My 2 cents.

 

[1nc 2000]

After switching over to a nytro primary last fall I have had zero roller issues in the primary this winter.

 

[fatchance]

I think it has more to do with weight profile. Seems to me the arc of the HH has less effect on the rollers than do the more linear profile arms

 

[jonlafon1]

I think it has more to do with weight profile. Seems to me the arc of the HH has less effect on the rollers than do the more linear profile arms

I concur. But I figured that might start a stir on here. So I kept my thoughts to myself ! Lol.

 

[1nc 2000]

I dont have an answer to why the bushing go out. I run HH and had bad luck on sidewinder primary rollers. Switched over to nytro primary and no issues. I even had my sidewinder primary replaced at the dealer.
I am sure happy that issue is in the rearview mirror now.

 

[Thunder Products]

As mentioned....it is the Sidewinder clutch that is being hard on rollers. It's been proven over and over.

The HH weights are more aggressive and don't push on the roller in a degree that the flatter profile weights do. But even in time, our rollers still would go out.

Everyone that has switched over to a previous style Yamaha clutch is not having issues anymore.

 

[NYTurbo]

I also know a couple of guys couldnt get 500km out of rollers, Yamaha warranted their clutch and all was good.

 

[Byam]

I also know a couple of guys couldnt get 500km out of rollers, Yamaha warranted their clutch and all was good.

They should buy a bunch of lottery tickets ....