Clutch temps

Srx007

Srx007

Member
Joined
Jul 23, 2014
Messages
157
Location
Cambridge Ontario
Hey there, wondering what issues there may be and how to correct them with clutch temps mostly Primary. The primary is hotter than the secondary so much so I would consider it Hot and the secondary warm as I can hold my hand on the secondary and can only hold my hand on the primary for about 4 seconds. They dont get any hotter than that even with lake running. This is a bender roller kit so on the Primary there is a Red spring 55-135 kgf 8-dn20 4.5 gram in each hole an the secondary 47-43 manu unknown Silver spring at 60. any lower and it seems as if secondary is slipping. Kit works well 8100 off line to 8500 then hold 8550 dont have room to hold for a long time just want clutch temps down. Any advice welcome thx.
 

would consider that fine, hottest my primary ever get is able to hold my hand on it for a bout 2.5 seconds and thats working the sled hard.
 
Ride lakes mostly with a comb of snow and ice, I do ride it pretty hard at times, under 80mph just seems slow on lakes lol. Ok thx, roudyroy that seems pretty hot.
 
Is the secondary spring all silver or just a paint mark of silver? I've ran that setup for years on the lake, some days it doesn't work and others it works great. I would say to try a Yamaha green @ 70 and see what happens. It would be softer then the Yamaha silver spring but if the whole spring you have is silver it could be a hauck spring and I'm not sure what it would be rated for, it may be to softer.

Change and test is the only way you will know.
 
if there is heat in the clutch its telling you.... your slipping the belt...………. so, if the front clutch is hot then you need to work on the front clutch. I see you say it climbs above 8500rpm, and that you cant hold it open for long times, well it likely climbs even higher then with longer distance. So the first step is either use a slightly softer primary spring to lower the rpm or add weight to the tip rivets, as in washers. If it was mine I would vote to go to a softer primary spring, as the spring your running with 55kg start would be high engagement for snow(less traction), and the 135kg shift would hold out the shift raising the rpm. If you get it to shift a little quicker with a softer spring it wont have to move the belt as far up in the clutch before it hangs onto it, the 55kg start is likely a lot of the heat unless your just lake riding all 99% of the time.
 
Ok great, thx mr viper, that makes sense since the primary has to spin so much faster just to engage and to generally ride around, I'll order a Y-W-Y spring since it is a little softer but not too far off 45-128. I have a WWW but I think that may be too soft and end up having to change too many parts. I do have a green dot sec spring but the sled didnt like it very much.
 
Ok so I finally was able to try out the sled with the YWY spring and it definitely worked to bring the temp of the primary down along with the secondary a little as well, Must have been down 25 degrees, I can hold my hand on it now instead of cooking and egg, didnt touch roller secondary spring tension either, now working on suspension for better transfer, if I hit it anything under 35-40mph sled wants to go over and I dont want to just rely on the limiter straps. Thanks again Mr. Viper.
 
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