VFJ clutch spring rates - Kawasaki ATV Forum
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post #1 of 81 Old 02-19-2010, 01:37 PM Thread Starter
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Exclamation VFJ clutch spring rates

I have the spring rates all sorted out.


I have 4 different zero stall springs. (higher rate are still very low stall due to the engagment # and all 2.5-2.6 inches tall)

they will be VFJ#1 to VFJ#4 And are for use for Teryx and ATV alike

Spring rates are measured exactly at 2.50/1.25 of an inch compressed heights.

VFJ#1 is 10/170 Low stall, Mid-high rate
VFJ#2 is 10/220 Low stall, High RPM
VFJ#3 is 20/250 Low stall, Very High rpm
VFJ#4 is 30/265 Low-Mid stall, Super High RPM

Next I have the higher stall and Atv oriented springs.

VFJ #5 is 55/160 High stall, mid RPM
VFJ#6 is 25/175 Medium stall, mid-high rpm
VFJ #7 is 70/260 High stall, Super High RPM



All these measurments are EXACT. I'll post pics of them when I color code them over the weekend

John

WEB: WWW.VFORCEJOHN.COM
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post #2 of 81 Old 02-19-2010, 01:56 PM
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lets see here, between the new clutch kits, accepting credit cards, dyno runs, muzzy exhausts and clutch mods themselves id say your aiming at complete atv world domination. is there anything you dont do for kawie v-twins? lol

09 KFX 730 ............................08 BF 650 SRA
AMR 730 BBK..........................UPP Xover Intakes
12.5:1 Pistons........................K&N Filter w/h
+ 1.5 Valves...........................Precharger
Port & Polish Heads.................Muzzy Standard
Twin Air Filter.........................PRM Full Skids
UPP Xover Intakes..................Dyna CDI
Dyna CDI............................... ITP Rims & Tires
Muzzy Super Pro
02 Velocity Stacks
VFJ Stage III &
Lightened Secondary
*6 Key
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post #3 of 81 Old 02-19-2010, 02:09 PM Thread Starter
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There's a few more things coming.

I sent my youngest Bro to welding classes. He was the best here, but needs more instruction. He wants to start making things and I just got him a Vforce.

I'm hiring someone to show me how to program the goddamn 4th axis so I can fully CNC port ANY of the heads. And being able to reproduce and modify the same exact results every time. I can modify them to get the highest power.

whatever I do, count on me giving it my 110%

John

WEB: WWW.VFORCEJOHN.COM
PHONE: 570-773-1240
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post #4 of 81 Old 02-19-2010, 02:51 PM
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i would expect nothing less than that from you john, sounds like alot of stuff just be sure to not get burned out on it.

09 KFX 730 ............................08 BF 650 SRA
AMR 730 BBK..........................UPP Xover Intakes
12.5:1 Pistons........................K&N Filter w/h
+ 1.5 Valves...........................Precharger
Port & Polish Heads.................Muzzy Standard
Twin Air Filter.........................PRM Full Skids
UPP Xover Intakes..................Dyna CDI
Dyna CDI............................... ITP Rims & Tires
Muzzy Super Pro
02 Velocity Stacks
VFJ Stage III &
Lightened Secondary
*6 Key
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post #5 of 81 Old 02-19-2010, 02:58 PM Thread Starter
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That's hard to do when you are doing what you like, and having fun doing it.

So if you don't like the stall on that 730 That was like a 40/180, I have springs for you that will be more trailable and rev even more RPM. like the 10/220.

John

WEB: WWW.VFORCEJOHN.COM
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post #6 of 81 Old 02-19-2010, 03:28 PM
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I want a #3,4 and 7.
Put them aside for me,I'll be up tomorrow or Sunday sometime.
I'll call your cell before I come up.

Officiallywas one of the fastest Prairies in the world

Team Green 04 V-Prairie, Ported AMR 730,XX cams,Digatron gauges,VFJ custom clutch with EBC bearing removed,V-force gears,AMR ported intakes,programmable Dyna,30 shot of Boon,Brute Force Flywheel,stock carbs,stock exhaust,Flexx bars,Rox Risers,ODI grips,Tusk Dozer plow,ECT.
AMR 330 347 6800
2013 BMW K1600GT
2015 BMW R1200 GS Adventure.
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post #7 of 81 Old 02-19-2010, 03:29 PM
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When are these officially going to available to purchase? I would like to get a #6 and #7 to try out.
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post #8 of 81 Old 02-19-2010, 03:36 PM Thread Starter
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I'm going to paint them up this weekend. they'll be dry by Monday.

Cost...they are 25.00 I figure flat rate USPS 2 day shipping is about 6.00 extra for as many as I can fit in the box.

Asnow, I'll set your's aside.

trust me guys, these are high rpm springs. you think a Polaris yellow rev's out quick at just under 200 pounds at 1.25. these will really rev the RPM up there fast.

John

WEB: WWW.VFORCEJOHN.COM
PHONE: 570-773-1240
EMAIL: [email protected]

DISCOUNT MUZZY EXHAUSTS click here https://www.kawieriders.com/forum/int...ml#post1328320
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post #9 of 81 Old 02-19-2010, 04:36 PM
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so would the no.6 be good on a bolt on quad as for drags? and ill take one of the 10/220's too since itll be a good trail spring. too bad the damn post office is closed tom. could you have em here before monkey mayhem? id really like to get it before then!

05 marble 730, just a stretched trail bike
04 marble ??? you dont wanna know


The party was fun but it got to costing too much to go ride, then the place closed. So its all for sale!
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post #10 of 81 Old 02-19-2010, 04:57 PM
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so what spring would you recommend for us brute force mud boggers???? 840 kit big tires etc...????
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