VFJ clutch spring rates - Page 2 - Kawasaki ATV Forum
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post #11 of 81 Old 02-19-2010, 05:26 PM
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Originally Posted by jksimpson View Post
so what spring would you recommend for us brute force mud boggers???? 840 kit big tires etc...????
good question I have been thinking about that to.

2006 FCP Brute Force 801
dynatek cdi
full big gun
nitrous wet kit

stock clutching for now but working on it
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post #12 of 81 Old 02-19-2010, 05:29 PM
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You know what I have...send me what I need (2), you pick them, 1 for asphalt and 1 for sand. I just got a set of american racers for the asphalt.


Last edited by PIPO; 02-19-2010 at 05:38 PM.
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post #13 of 81 Old 02-19-2010, 06:37 PM
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So how do you think the #6 spring will compare to a Dalton O/B? The numbers look very close to the O/B.

'04 KFX800
DSC 12:1 Pistons w/ Stg 2 cams, Ported Heads, 36mm carbs, Muzzy Super Pro, Dual MTX-L, VFJ Stg 3 Spidermod Clutch & Adj. Weights, +8 Swing Arm, Elka Shocks, 24" 14-paddle Staggered SLS Ripper paddles, BOSS NOSS 40-shot

'04 KFX730
Custom 84mm 12:1 JE Pistons w/ FST Stg 2 cams, Muzzy Super Pro, UPP Crossover Intakes, 8* Timing Key, Elka Shocks, +4 Swing Arm Extension, 24" 10-paddle Skat-Trak Extremes

'04 KFX730
Wiseco 84mm 11.5:1 Pistons w/ Fundy Trail/Race cams, Muzzy Super Pro, Crossover Intakes, 6* Timing Key, Works front & Elka Rear Shocks, +4 Swing Arm Extension, 24" 9-paddle Skat-Trak Extremes

'05 BF730 SRA

'04 Prairie 700
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post #14 of 81 Old 02-20-2010, 05:32 AM
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I would like to try something in the maroon spring area. Hell I will even may you if you want to dyno some!!!

2008 Brute Force 800: AMR 12.5:1 pistons, AMR XX cams, AMR Rings, Millennium Nikasil Cylinders, EHS Air Box Lid, Muzzy Pro Exhaust, Power Commander III, Moose Module, VFORCEJOHN SpiderMod Clutch (Maroon Spring), 24 LB Injectors, and a Bunch of Custom work to make it Reliable, Fast, and Tuned just right by VFORCEJOHN
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post #15 of 81 Old 02-20-2010, 03:16 PM
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Picked up the springs today.
I really think the ones I got are just what some of us needed to be quicker in short drags.
Thanks John..

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
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post #16 of 81 Old 02-20-2010, 05:53 PM
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What I like about the higher stall springs you can run heavier flyweights for better belt grip and torque and still get in your best hp range as fast as lighter flyweights. It also tends to hold that peak rpm area for a longer period of time. The slightly heavier fly weights donít over rev as fast and get you out of your peak rpm range as fast. Great idea on Johns part coming up with these springs. The spring I love and is similar is the HPD plain with a 30-235 rate.

Brute Force AMR 840, 13:1 pistons, 4X cams, extended rockers, Big Kev's Performance Full race port, +1.5mm exhaust valves, +1 mm intake valves, muzzy pro, 39mm carbs, programmable dynatek cdi, custom airbox, JHmachine clutch, HPD plain primary spring
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post #17 of 81 Old 02-20-2010, 09:53 PM
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let me know when these are ready for purchase and which one is the best setup for me.. pm me if needed i have loved all the clutch work you have done so far interested to see if one of these springs is what im looking for..
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post #18 of 81 Old 02-21-2010, 01:13 AM
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Originally Posted by minimus View Post
The spring I love and is similar is the HPD plain with a 30-235 rate.
Theres a spring not too many people use, but I love it...it was one of my firsts with my stocker and was just completely useless...but now, I wish I could tell it apart from a stock spring...I use it in my 800 every now and then when we do hill climbs...

just been using the same ol' "go to" o/bl spring for about everything else. its a good trail spring. dont care who thinks its "too much stall".

2012 General Lee BKP 800... Dixie Horn
Stamp #1
Stamp #2
Stamp #3 - pending
Stamp #4 - waiting on quad to sell

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post #19 of 81 Old 03-09-2010, 03:21 PM
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hmm any new info on this yet?????
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post #20 of 81 Old 03-09-2010, 04:04 PM
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Like to find out what is the red and Yellow spring rated at? or is it Orange, danm I think Im going color blind!

KFX700 2006 HMF Duals, VFJ-2 Clutch Mod, 12 hole Air Lid, 6" Extendtion Swing Arm, Fire Ball Racing Plus 2" A-Arms w/ Long Travel Elka's Front & Rear Shocks, 6-deg Key Way. ( Need My Cross Over Tube Intake and Muzzy Exhaust Soon!)

Last edited by ERBE; 03-10-2010 at 09:45 AM.
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