Troops
spent 4 hours doing some clutch testing. I figured I would see what I can do with the stock components & see if I could make em better.
Anyway I got the stock stuff to work real well with some changes
changed rollers from 15.6 to 15mm
added 3 engagement shims
switched helix from a 43 to a 45.
This worked very well & is a cheap mod.
It,s not as quick as any supertorquer stuff I tested but it will hold it,s own & i got really good top speed. rpm,s on top end were 8900...perfect.
good little cheap clutching set up.
spent 4 hours doing some clutch testing. I figured I would see what I can do with the stock components & see if I could make em better.
Anyway I got the stock stuff to work real well with some changes
changed rollers from 15.6 to 15mm
added 3 engagement shims
switched helix from a 43 to a 45.
This worked very well & is a cheap mod.
It,s not as quick as any supertorquer stuff I tested but it will hold it,s own & i got really good top speed. rpm,s on top end were 8900...perfect.
good little cheap clutching set up.
asphaltkitty
Extreme
whats the idea behind the engagement shims, more or less engagement. 
AIRWOLF
Guest
asphaltkitty said:whats the idea behind the engagement shims, more or less engagement.
more
walty
Extreme
Turk?have you done the same testing with a 121"?
bad brad
Newbie
walty said:
i was wondering the same thing
Nope, but should work on a 121.
walty
Extreme
turk i know you love the drag n flys
what do we need to buy to make are 121" fast for agressive trail riding
what do we need to buy to make are 121" fast for agressive trail riding
Buy a set of dnf,s. good acceleration & backshift.
Daranello
Suspended
Will this help with belt slip at slow speeds?? Ie loading on trailers, taking my son for a ride, xing snowbanks?
The 15 mm rollers really make the sled engage super smooth with no belt slip. shims are optional to raise engagement but if you a slow speed trail rider it comes in low & smooth.
grenade6
Veteran
hey i was wondering where you can buy the helix and rollers? i called my yamaha dealer and they had no idea.
They are yamaha oem parts
Place a wanted add on the 2 stroke side. Should be able to find both for about $75 used.
Place a wanted add on the 2 stroke side. Should be able to find both for about $75 used.
170plus
TY 4 Stroke Junkie
- Joined
- Jan 14, 2004
- Messages
- 541
- Location
- washburn maine
- Country
- USA
- Snowmobile
- 2021 polaris assault 850,18 sidewinder ltx,14 nitro xtx,06 apex rtx,
some input on the low speed riding and engagemant,i replaced the aluminum rivets on the weights with 2.44g steels(a buck each),changed the primary spring from a b-s-b to a b-p-b (16 bucks),and changed the secondary from 70 to 60(freebie),this changed the low speed riding from herky jerky to very smooth,no more burning the belt loading it on the trailer,also dropped my 50mph rpm from 6500 to 5900,saves gas,im turning 8750 on top at 108,seems to be gaining rpm all the time,right now only about 350 miles so might have to change the 2.44g rivets to next step heavier,this setup is running on a rr bed groomed trail at around 600ft elevation so we have pretty good air ,might not work where the elevation is higher
Mtnviper
Vendor
Turk
Did you find the heavier mass in the tip (as per XTX set-up), to give a fairly straight shift?
Did you find the heavier mass in the tip (as per XTX set-up), to give a fairly straight shift?
With some slight tweaks the stock clutching pulls great. A helix about 46/42 would take it to the next level.
