8bu-00 weight suggestions

Gwg

If you want a lower engagement why not try a GWG yami spring which is a much more reasonable engagement and same shift rate.

Madmatt
 
Are there any charts on here that show you the different yamaha springs availabel along with their shift rate?
 
YAMMIEGOD3:16 said:
DUDE, I THINK IT WAS 98700 THAT POSTED THE HAUCK ORANGE WILL WORK, BUT HOPE YOU LIKE A HIGH ENGAGEMENT. EASY 5000 OR BETTER. ANOTHER WEIGHT YOU MIGHT CONSIDER IS A 8BU-10. NOT AS AGGRESIVE AS THE 8BU-00. ALSO 89A-10. GREAT WEIGHTS FOR ALL AROUND USE. 3:16 (yammie tony)
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Yeah, Why don't you try an 89A-10 weight.

ALSO, I WILL BUY THAT ORANGE SPRING IF YOU WANT TO SELL IT!!!!!!!!!!!!!!!!!!!!!!!!!!
 
jaydaniels said:
Are there any charts on here that show you the different yamaha springs availabel along with their shift rate?
Click to expand...


tech section under Clutching.........
 
Here is a good corner t corner setup with 8BU's.

.8 inner
4.5g tip
Max-Red spring

Your helix
silver @60-70*

Run this and get back to me, It'll be VERY close!
 
98700 said:
Yeah, Why don't you try an 89A-10 weight.

ALSO, I WILL BUY THAT ORANGE SPRING IF YOU WANT TO SELL IT!!!!!!!!!!!!!!!!!!!!!!!!!!
Click to expand...

I have a solid orange p-spirng, but I dont know if its a Maxx. Perf. spring or a Hauck spring.
 
sorry guys i am not selling any parts yet, i havent started tunning since i am waiting for gears still. besides their is nowhere near enough hard packed snow around here to try and tune, we are just these past 2 weeks getting alot of loose snow falls. Maby once i try a few set ups some unwanted parts may come up for sale.. lol its the name of the game, sometimes it costs money to learn the hard way...lol if i dont have anything for sale then you will know that i liked the combo.
 
What difference or effect would you see in a 51/43 Helix vs a 53/47? I had 2 SRX's with somewhat similar clutching but work completely different and one is very hard on gas. Could a very small change in the Helix make much difference? Below are my 2 setups. Same gearing on both sleds.

00 SRX 700 : Barely pulls 8100-8300 and hard on fuel. Also bad backshift.
8BU-00 4.5g in tip Total weight 53.2g
ywy Primary spring with 2 engagement shims (Rate 2.5kg/mm)
Green Secondary 60deg twist
53/47 Helix

98 SRX 700 Pulls 8500, maybe even slight overrev. Great gas mileage and backshift.
DPY 55.5 G weights
Dalton Black/Blue spring (Rate 2.33 kg/mm)
Green Secondary with 60deg twist
51/43 Helix
 
53/47 is a huge massive change over a 51/43. The 53/47 needed a silver secondary spring to work well.
 
jaydaniels said:
What difference or effect would you see in a 51/43 Helix vs a 53/47? I had 2 SRX's with somewhat similar clutching but work completely different and one is very hard on gas. Could a very small change in the Helix make much difference? Below are my 2 setups. Same gearing on both sleds.

00 SRX 700 : Barely pulls 8100-8300 and hard on fuel. Also bad backshift.
8BU-00 4.5g in tip Total weight 53.2g
ywy Primary spring with 2 engagement shims (Rate 2.5kg/mm)
Green Secondary 60deg twist
53/47 Helix

98 SRX 700 Pulls 8500, maybe even slight overrev. Great gas mileage and backshift.
DPY 55.5 G weights
Dalton Black/Blue spring (Rate 2.33 kg/mm)
Green Secondary with 60deg twist
51/43 Helix
Click to expand...
JAY NICE INFO. YOUR TOP SET-UP VERY SIMIALR TO MY 2002 SRX.
02 SRX 700- PULLS 8500
8BU-00 WEIGHTS, ( 53 grams ) roughly
MAXXIMUM PERF SRX-WHT PRIMARY SPRING
5000 ENGAGEMENT
GREEN SECONDAY SPRING AT 80 TWIST
50-40 HELIX
23-38 GEARING, ( now changed to 23-41 ) because we lost our drag strip due to development. 3:16 (yammie tony)
 
Turk said:
53/47 is a huge massive change over a 51/43. The 53/47 needed a silver secondary spring to work well.
Click to expand...

Thanks for the info Turk. Generally, how does a steeper angle helix act vs a shallow angle? Say a 50 vs 45. Would it be faster up-shift but not as great backshift? I'm thinking of trying the 51/43 again.
 
jaydaniels said:
Thanks for the info Turk. Generally, how does a steeper angle helix act vs a shallow angle? Say a 50 vs 45. Would it be faster up-shift but not as great backshift? I'm thinking of trying the 51/43 again.
Click to expand...

yes, a steeper angle upshifts quicker than a shallower angle. the shallower the angle, the better backshift. also, the shallower the angle, the more side force translated into the sheaves and into the belt....better belt grab. steep angles don't provide as much force to hold onto the belt, so rule of thumb is to use stiffer secondary springs when using steep helixs.
 
I found info on stock SRX clutch setup. Below is what was listed for the primary weights. What does the 17.2 and 13.9 stand for?

Clutch Weights (rivets) 8dn-20 w/17.2 & 13.9
 
17.2 and 13.9 is the length of the rivits 17.2 is 4.5grams 13.9 can't remember.rivit specs are in the tech section under clutching
 
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