what angled helix is this?

51/43 from a RX-1/Apex/Attack. It acts like a 48/42 angle as compared to most aftermarket helix,s.
 
Turk,
I'm confused. Let me ask then if it begins like a 48 then its not much different than the stock 47 in a Viper. So why would they call it a 51? Does your reason for saying this mean you have measured aftermarket helix’s and compared angels with Yamahas 51 helix? I guess it does finish slower than the stock 47 I guess I got half of what I thought I was buying. Any thoughts appreciated.
 
I am just comparing the way it performs on a sled on snow. I used it vs a 50/42 dalton. The dalton lowered initial rpm,s but were about the same on top speed. I compared it to a 48/42 dalton & it performed very similarily. Rule #1...helix,s from different manufacturers do not pereform the same!!!!! A strate 47 helix is more aggressive over-all then a 51/43.
 
Thanks Turk - So then to reduce RPM off the line and upshift a little faster what would you recommend? A 53/43 from Yamaha if available or just change manufactures and still try a 51/43.

Pioneer has this offering.
Available angles:

43/39, 45/39, 47/39, 48/40, 52/40, 45/41, 47/41, 49/41, 51/41, 48/42, 47/43, 49/43, 51/43, 53/43, 49/45, 51/45, 53/45, 51/47, 53/37

Price: $84.95 each, includes bushing
 
Turk,
What do you think of these Dalton helix?
Have you tried any of these Radius series.

Cut and pasted from the Dalton website.
The new "R" (Radius) series helixes for Yamaha feature a short duration initial angle radiuses into what is a mostly straight angle helix (second angle). This style of cut is a favorite for some clutch tuning professionals and is quite effective at controlling initial over rev while still maintaining the characteristics of a straight cut helix.

Y 49R44 Y 52R45 Y 54R44
Y 50R42 Y 52R46 Y 54R45
Y 50R44 Y 53R41 Y 54R46
Y 50R46 Y 53R43 Y 54R48
Y 50R47 Y 53R45 Y55R45
Y 51R34 Y 53R47 Y 56R43
Y 51R46 Y 53R48 Y 56R44
Y 52R/40 Y 54R40 Y 56R46
Y 52R42 Y 54R42
Y 52R44 Y 54R43
 
The radius helix,s work well on SRX,s with stock weights. It,s been 5 years since i messed with them so i don,t remember a lot nor can I trust myself to be very accurate.
 
Turk, I might be getting the E.R. Kit, and i was told to run a 50/46 helix, due to the guy tested many diff helix's and found that angle to be the best, Though i don't know if there are better options. Not sure if you know anything about the Encapsulated Roller kit, but thats what i was told to get is a 50/46, 50/46 in my mind equals Blah, i don't know $h!t about em.

all this with stock weights in the primary etc.
 
yamidude59, stop worrying. the 50/46 will work great in your sled with the correct secondary spring. as long as you run the cpc red/white spring, you'll be fine.
 
Yamidude59 said:
i wanna under stand how the shit works!
Click to expand...

Then use the search opition!!!!!!! MRVIPER and TURK have both covered how clutching works for the most part, so all you have to do is search it. Theres also a write up in the Tech Pages on clutching.

Keep the attitude up and no one on here will want to help you.
 
dont mean to steal thread away but was wondering if any one knew what a CR27 helix is? thats all the markingd that i see on this roller clutch set up. thanks.
 
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