Clutching on the cheap

[Attacker]

6000 miles

 

[stingray719]

I have a 45-39 helex gwg spring in primary and 4 shims 3-6 grams in the tip of the 8fps weights which I drilled out to 9/64 hole. I haven't weighed them yet.

Take a look at your secondary spring and make sure it is ok. With 6k miles on that sled you should hit the rev limiter with 3.6 rivets.

 

[yamamarc]

Just ordered my parts!!! Thanks again for the 100 th time stingray!!!!lol you rock!! and Can't wait to set this up hopefully I'll finally take my wife and her zr 7000She has no clue what I'm doing!!SHHHHH!!!!

 

[yamamarc]

once I get the kit I could do a step by step installation with pics if anyone is interested!!!

 

[Sam Zuehlke]

Pics are always good.

 

[cannondale27]

once I get the kit I could do a step by step installation with pics if anyone is interested!!!

We can put it in Facts Sticky or add it to first page of this thread to make things easier for people also. Thanks!

 

[yamamarc]

We can put it in Facts Sticky or add it to first page of this thread to make things easier for people also. Thanks!

Cannondale do I make a new thread or just keep going on this one???? My parts have been shipped Friday should be here in a week or so!!! I will be taking my time to install the kit and will take picture every step of the way!! This will be my first time playing around with clutches so I may be asking a few questions to few of you pros as I go!!! (stingray I may be bothering you a few times...lol) As I do the install if anyone notices anything that is inaccurate in the thread please let me know so I can edit.

 

[aquaticlaker]

Going to post this because I am truly flabbergassed by aquaticlaker's sled and the power it is making stock with the COTC setup. I am poting this because this is the first sled I have worked on that is taking way more weight than I have ever put in a COTC setup for anyone!

I have him loaded with 4.5 in the tip and 3.0 in the middle with the 8FP's and he is still hitting the rev limiter hard. Now it's time to take it to the limit and really throw some weight at it!

I pm'ed Mike and told him to find some lead rivets or regular rivets (6-7 gram) or M6 x 1 screws/bolts & nuts....But we have to be careful and not go past the 1/8" maximum height on each side of the weight.

Going to post this because I am truly flabbergassed by aquaticlaker's sled and the power it is making stock with the COTC setup. I am poting this because this is the first sled I have worked on that is taking way more weight than I have ever put in a COTC setup for anyone!

I have him loaded with 4.5 in the tip and 3.0 in the middle with the 8FP's and he is still hitting the rev limiter hard. Now it's time to take it to the limit and really throw some weight at it!

I pm'ed Mike and told him to find some lead rivets or regular rivets (6-7 gram) or M6 x 1 screws/bolts & nuts....But we have to be careful and not go past the 1/8" maximum height on each side of the weight.

Going to post this because I am truly flabbergassed by aquaticlaker's sled and the power it is making stock with the COTC setup. I am poting this because this is the first sled I have worked on that is taking way more weight than I have ever put in a COTC setup for anyone!

I have him loaded with 4.5 in the tip and 3.0 in the middle with the 8FP's and he is still hitting the rev limiter hard. Now it's time to take it to the limit and really throw some weight at it!

I pm'ed Mike and told him to find some lead rivets or regular rivets (6-7 gram) or M6 x 1 screws/bolts & nuts....But we have to be careful and not go past the 1/8" maximum height on each side of the weight.

================
Met up with NOS-PRO yesterday in the morning for some testing. We started out with a couple 94 MPH runs. Made some changes to COTC and next run was 98MPH. One more change and another run and hit 100MPH.

Last try was running a machined primary and secondary! WOW! 101 on GPS.

Sled is Stock other than the changes to the clutch.

 

[yzf1999]

Does it still pull the same as stock down low and thru the mid range?

 

[1049triple]

What was the secondary twist?
From my experience, I always get better top speed at 1-6. I looked at my notes from the time when I had the Nytro and it was too faster at 70 degrees of twist.

 

[NOS-PRO]

Does it still pull the same as stock down low and thru the mid range?

Very good pull on bottom and midrange....this was on the river testing so take off spun a little, but I know hardpack would be awesome! Snow was soft from the warm weather and wasn't flat due to the high winds and snow we had last week causing some drifts, but it was the best place to test.

================
Met up with NOS-PRO yesterday in the morning for some testing. We started out with a couple 94 MPH runs. Made some changes to COTC and next run was 98MPH. One more change and another run and hit 100MPH.

Last try was running a machined primary and secondary! WOW! 101 on GPS.

Sled is Stock other than the changes to the clutch.



View attachment 107024

Was a great day and finally figured out a really good setup for aquaticlaker's sled

 

[NOS-PRO]

What was the secondary twist?
From my experience, I always get better top speed at 1-6. I looked at my notes from the time when I had the Nytro and it was too faster at 70 degrees of twist.

3-3 was getting us better mph on Saturday.

 

[yamamarc]

Okay here is a step by step installation of stingray"s cotc kit
this was my first time ever doing any mods to a sled it was pretty simple to install!
To keep thing as accurate as possible if you experienced guys see any mistakes please let me know so I can edit!

First I removed the side panels, seat, the black plastic cover that wraps around the gas tank and removed the belt(note: the removal of the seat and black plastic cover that wraps around the gas tank is optional I liked the extra room)


Second I took the primary clutch cover off by removing the 6 bolts(10mm socket)
Be careful there is pressure from the spring I just kept one hand on the cover to remove the bolts

3- remove 1 weight at a time
place something under the clutch to catch any parts that you may drop accidentally
remove the clutch weight bolt( 10mm socket 1/4 inch drive with a universal and 10mm wrench)
then loosen the 2 allen head set screws that hold the pin(2.5mm allen wrench)
slowly remove the pin holding the weight and the white washer on each side of the weight

4-Grab your new weight (I installed the 3.6g rivet at the tip) and install it making sure 1 white washer is on each side
center the pin tighten the set screws and install the bolt(torque@ 4.3ft/lb)
do the same for the other 2 weights

5 I installed 4mm shims in my clutch cover and a new spring

6- Reinstall the clutch cover make sure you line up the x on the cover with the x on the clutch (balance) and install cover(torque the 6 bolts@ 10ft/lb)

 

[yamamarc]

Now for the secondary clutch
I installed a the new helix and shims and went 3-3 sprig wrap

first remove the 3 nuts on the secondary tower make sure to hold the helix while removing it there is spring pressure(12mm socket)

I installed 1 washer on each stud( the washer need a side cut off)

On the helix there are numbers and the same with the clutch
I installed the end of the spring in the hole marked 3 and the other end in the hole marked 3 on the clutch
Once you have the helix in and spring lined up you will have to twist the helix clockwise to install it on the studs(about a 1/4 turn)
install the nuts and slowly tighten making sure the washers cut edge stays in place
(Torque nuts @17ft/lb)

 

[yamamarc]

Hope this helps some of you guys I know myself I always understand better with pictures!!!