RX-1 136" Converted... clutching crappy...

[Turk]

54/44 advant-edge is a monster steep helix. it is more suited to a turbo. You can easily add 3-4 degrees to ech end to compare to another helix like a dalton. Run the heelclickers like this
5 grams heel
4 grams tip
silver secondary at 80 wrap
white hc primary spring
use the stock rx-1 8bvfa helix...that advant-edge is a kazillion times too aggressive for your sled. sell it to someone running a turbo.

 

[Jack_Shaft]

Thanks Turk, I'll give it a shot.

The only Helix I have on hand other than the 54/44 is the stocker from the RX-1 shorty. This should be a 51/43 but for some reason it's a straight 47. Yes I bought the sled used, so I guess the previous owner messed around with it a little.

To be honest, I'm only assuming its a 54/44 that I have in there, it's the Advant-Edge helix that comes with Ulmer's stage III clutch kit and he won't tell me exactly what it is....! Some people have said that it's a 54/44 so that's what I'm going by.

I will try the HC primary kit, I have seen them work very well so I have no reason not to try them out. The only thing I'm worried about is engagement RPM, but I should be able to tune that down using shoulder weight.

Redsnake and I may try it on Thursday night after work. Up for it Joe?

 

[redsnake3]

im up to setting up that clutch. lets get it ripping some arms.

 

[Len Todd]

 

[Jack_Shaft]

Ah ha! Do it, then if it works I'll follow suit!

My center rivets are completely removed, just my tip rivets are in there now. If the set-up works for you, Ill pull my tip rivets too.

 

[grader]

if you cant pull the proper top rpm with the stock weights, then something is wrong. taking rivets out may get your rpm back up, but you can say goodbye to your top speed as well. i checked the chart on the o-s-o spring and its engagement is exactly the same(35kg) as the stock one. its rate and final shift is higher, thus making higher rpm compared to stock, all other things being equal.i have 15000 miles on the o-s-o spring, and have never blown a belt. removing weight, especialy tip weight to regain rpm, is a sign of power loss somewhere else.

 

[black john]

rpm

i have seen this same problem before. and i can tell you extly the same thing as grader did you have a problem eles were on you sled the o/s/o primary spring has the same perload as the stock spring at 35 kg each . by takeing wight out of the arms all you are doing is masking other problems that you have. i expet that the next post that were see on here from you is were did my top speed go. posting stuff like this and you are supost to be a teck advsor wo. its time to wake up and do the basic checks. :exc:

 

[Len Todd]

 

[grader]

i did not personally attack anyone and am only trying to help. my info on the springs came from the yamaha poster(from dealer) that lists every primary and secondary spring yamaha makes, as well as shift curves for different weights, etc. if you dont like the performance of the o-s-o spring, thats fine. i have never blown a belt or had any belt issues using this spring. you state your belt clearance is .018 so your engagement should also be smooth. as stated before, if your unable to pull proper rpm that you once did, then something has changed. pulling weight out of the primary is not the answer. it means the engine is no longer producing the same power, or there is power being robbed somewhere else, eg. clutch alignment, center to center, paralelisim, motor movement , track alignment, tension, etc. and many others that cause friction or drag. its like saying you could always drive your truck up that hill in fourth gear, but lately it wont pull it, so you drop it in third and think you solved the problem. my sled is very similar to jackshafts, except for suspensions, so my hope was to get his clutching up to par so he can enjoy his ride.

 

[black john]

clutching

yep thats were it is grader . any time you cant pull your normal clutching some thing is out of alinment or if you start have ing belt problems ie short belt life, blowing belts , wearing belts ot to soon, burning belts, sqealing belts etc etc . and if i had not correted my speedo i would still be seeing speeds of over 140 mph. i know what works and have shared my tips with every one on this site with out hesation. and had you done a search like most would have done. you would have found this to be fact. sorry if i offended you in any way. just facts thats all . john

 

[black john]

speed

note that graders sled was converted to 136 from 121 and used to have a 121x1 track and it would pull 117 on radar any day of the week after conversion to 136x1/14 ripsaw it still pulls 117 on radar with 15000 on the clock with out doing any clutch work or gearing down. john

 

[Len Todd]

 

[Jack_Shaft]

i checked the chart on the o-s-o spring and its engagement is exactly the same(35kg) as the stock one. its rate and final shift is higher, thus making higher rpm compared to stock, all other things being equal

Although I agree with you completely, I swapped out the YSY for the OSO spring last night with all other components being the same and my engagement was raised by about 1200rpm.

Go figure.