'81 SRX reverse cam secondary
'81 SRX reverse cam secondary
I have an '81 SRX 440 with a comet 108 primary. I have heard that I will need a reverse cam secondary off of a '95 or '96 vmax in order for it to run right. Is this true & will this secondary slide right on or will I need the '95 vmax jackshaft as well? Does anybody know what spring & weights I should be running with this setup? With my current setup (108 & stock secondary) I can only get 42 mph out of this sled at 5500 rpm. Thanks, Reed
Last edited by Yam429 on Fri Oct 23, 2015 7:34 pm, edited 1 time in total.
Re: '81 SRX reverse cam secondary
Yes the reverse cam off of the newer Yamaha's will fit your secondary shaft. Start with N1 weights and the purple spring in the comet, you will need to clutch it to run at 9000-9250 rpm's. This should get you started..
JEFFERY M FOURNIER
SLEDS
83 VMAX 540
81 SRX 440
SLEDS
83 VMAX 540
81 SRX 440
Re: '81 SRX reverse cam secondary
Perfect, I'll try that. Thanks Jeff
Re: '81 SRX reverse cam secondary
x2 on Jeff's reply. Loads of good reading here viewtopic.php?f=2&t=1506
https://www.youtube.com/watch?v=PFb6NU1giRA
"I prefer dangerous freedom over peaceful slavery." Thomas Jefferson
"I prefer dangerous freedom over peaceful slavery." Thomas Jefferson
Re: '81 SRX reverse cam secondary
Which purple spring in the 108? There are two a 207758 or 207888.
Re: '81 SRX reverse cam secondary
https://www.youtube.com/watch?v=PFb6NU1giRA
"I prefer dangerous freedom over peaceful slavery." Thomas Jefferson
"I prefer dangerous freedom over peaceful slavery." Thomas Jefferson
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Re: '81 SRX reverse cam secondary
so I could use a polaris primary and vmax 500 new style secondary for the 81 srx? And/or yamaha clutch awesome!!! Never thought of this. Doesnt it need to be cut or something?
Re: '81 SRX reverse cam secondary
Use the 207888, it should get you in the ball park..
JEFFERY M FOURNIER
SLEDS
83 VMAX 540
81 SRX 440
SLEDS
83 VMAX 540
81 SRX 440
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- Posts: 659
- Joined: Tue Feb 24, 2009 12:42 am
- Location: Milw. Wi
Re: '81 SRX reverse cam secondary
I used a new Polaris on mine and cut the 83 sec to open more. Phil had a post on here somewhere which turned me on to the trick.
Re: '81 SRX reverse cam secondary
Shoot I just got the purple 207758A spring delivered to my door today. Am I going to want the purple 207888A instead? How much of a difference is there?
Re: '81 SRX reverse cam secondary
viewtopic.php?f=2&t=1506&p=9822&hilit=purple#p9822Yam429 wrote:Shoot I just got the purple 207758A spring delivered to my door today. Am I going to want the purple 207888A instead? How much of a difference is there?
https://www.youtube.com/watch?v=PFb6NU1giRA
"I prefer dangerous freedom over peaceful slavery." Thomas Jefferson
"I prefer dangerous freedom over peaceful slavery." Thomas Jefferson