clutching

1

1993Vmax4

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Oct 25, 2008
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Location
BC Canada
.............................ls there any way to find out what the rivits weigh in a clutch?
My 1993 Vmax4 with 89A -10 both rivits in the weights have "stock" look, machined/pressed vs peened. l need to know to bring down my rpm by 900rpm (fitted 800 cdi)

thanks all
 
changing the rivets alone, i don't think will bring you down 900rpm. you'll probably need to change out the primary spring to one w/a lesser finish force.
 
mopar1rules said:
changing the rivets alone, i don't think will bring you down 900rpm. you'll probably need to change out the primary spring to one w/a lesser finish force.
Click to expand...
Thanks Mopar

Curent spring has pre load 45 - spring rate 2.25 - total force 120

Is finish force the same as total force?

What finish force should i aim for, i would rather change spring than rivits!

Thanks
 
Sled has: Benders, boyseens, dial a jet, airbox shelf delete/opened airbox tops, raised port timing, heads tweaked, ports/mainifolds profiled, 800cdi, welded balanced cranks, i think thats it. Tuned good.

Sled is peaking at 9000-9100rpm ........................maybe 900rpm to much?

Thanks
 
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1993Vmax4 said:
Thanks Mopar

Curent spring has pre load 45 - spring rate 2.25 - total force 120

Is finish force the same as total force?

What finish force should i aim for, i would rather change spring than rivits!

Thanks
Click to expand...

Yep, finish force is the same as total force.
 
1993Vmax4 said:
Sled has: Benders, boyseens, dial a jet, airbox shelf delete/opened airbox tops, raised port timing, heads tweaked, ports/mainifolds profiled, 800cdi

Sled is peaking at 9000-9100rpm ........................
Click to expand...

I think you'll want to get down to around 8350. If I was you, I would change the 89a10 weights, in favor of the '95-'96 vmax4 weight, which is the 8bu-00 weight.
 
mopar1rules said:
I think you'll want to get down to around 8350. If I was you, I would change the 89a10 weights, in favor of the '95-'96 vmax4 weight, which is the 8bu-00 weight.
Click to expand...


Thanks mopar, i have a 96 i will just swap round the weights and give it a try.
 
mopar1rules said:
I think you'll want to get down to around 8350. If I was you, I would change the 89a10 weights, in favor of the '95-'96 vmax4 weight, which is the 8bu-00 weight.
Click to expand...

1t was pissing down with rain yesterday so i tried a white pink white spring out of the 800cc before swapping the weights aound, it brought the rpms down to around 8500. Sled felt much better, i did a couple of runs with the heavier spring and then the WPW, with the lighter spring the power seemed to tranfer to the snow much better, less track spin skis up a little more/easier with no suspention ajustment.

The WPW is around 17kg less finish force than the spring i was using so ive ordered a blue pink blue which has around 6kgs less still, got some shims coming aswell. When everything arrives i shall spend a day on it in the mountains, play around with some mixes.

ls there a downside to bringing rpms down with springs vs weights/rivits?

Thanks
 
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fastmax said:
Bender quads were made to run at run at 9000-9100 rpm :o|
Click to expand...


GREAT, do you have the spec sheet that shows this for a 750?

All i could find was this for a 800cc
 

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