Anyone ever broke a primary spring?

[Anola09nytro]

Was taking apart the primary last night and going to install the new Ulmer kit I bought. When I got to the spring it was in two pieces. I'm fairly new to sledding and was wondering if this a common thing or if there is something I should be looking at that might have caused this.

All feedback is welcome.

2009 nytro rtx se

 

[natedawgedog]

Was taking apart the primary last night and going to install the new Ulmer kit I bought. When I got to the spring it was in two pieces. I'm fairly new to sledding and was wondering if this a common thing or if there is something I should be looking at that might have caused this.

All feedback is welcome.

2009 nytro rtx se

anything is possible, how many miles on the sled?
check the condition of all the moving parts, anything binds while the spring is out? how do the faces of the clutch sheaves look? how did the clutches perform before the sled was put away for the summer? its uncommon for a yamaha clutches to be problematic or break for that matter.
if the primary looks good aside from the spring breaking I would say dont worry about it. if you have any other red flags on this primary during your inspection you should probably let someone at your yamaha dealer to take a closer look into it for you.

have you looked at this? and read the comments, its very helpful
http://www.ty4stroke.com/viewtopic.php? ... sc&start=0

 

[Anola09nytro]

3000miles on her

Nothing binds, and the faces are smooth no groves or anything I can see or feel.

 

[APEX 06]

Had happen and I think it was just ware that did it.

 

[09nytro]

Yes

 

[Ffbsy]

Spring

All Yamaha clutches are very un problematic but the springs can always break. Have had happen on a few other sleds just not my nytro yet

 

[Mills]

Yes, primary and secondary springs do break. All springs have two heights that you want to check. The first is called the "free" height and the second is the intsalled height. the Free height is the length of the spring when it is not intalled. the installed height is just that, the length of the spring after it is installed. Know what both are because if either of them change by 10% or more you have a problem. I have seen primary springs take a set after only two years meaing that I measured the free height when new and then again two years later after taking it out of the clutch and remeasuring finding the free height had change about 12% making the spring much less affective and changing the overall shift characteristics of the clutch. I recommend changing primary and secondary springs every two years. If you ride hard and get your clutches hot often then I would suggest changing them every year.
Mills

 

[Off Trail Mike]

X2 .... springs break and springs definitely fatigue after a while. I have a Tundra 300F the kids use (monster 20HP) and while driving it one weekend noticed it was very slow to backshift. Took apart the secondary and although the spring was in one piece, it had gone completely soft. 1000 miles on the sled.

Both primary and secondary springs are definitely worth checking from time to time, and easy to include in your regular clutch maintenance.

OTM

 

[Beenba]

A buddy's apex primary spring broke last year. Looks like it was just from fatigue. Threw a new spring in and good to go.