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Discussion Starter · #1 ·
Hi, I am Sheldon Ewing. My brother bought a 2006 KFX 700 last year and we rode the piss out of it. We both love the thing. Much faster than my Sportsman 500 all modded out that I wrecked.

After spending a season on it my broski is ready for some more power. We ride trails, hills, and mud.

Things done:
2500lb winch
rear rack
Moose Racing throttle
Fresh fluids and amsoil everywhere it could go

Things I am doing:
polished slides
white polaris spring
12 hole mod
CR7EIX plugs
Non resistance plug wires
2002 prarie stacks
Going to add 25 inch rear mud lites for clearance

Questions:
Is the advancing key worth it?
what jetting should I be looking at for the stuff listed above? (starting point)
Air filter recomendations?

Thanks for any help. Hope to get my own soon or the KFX 400 because I am partial to standars unless the spring really wakes this thing up.
 

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Hey 4stroke:p:p---Welcome to KR---Most of the guys on here will recommend the Twin Air Power Flow Kit---It's $89 at Rocky Mountain ATV----Jetting from 178-185---Start with 180 front and 182 rear---You can do a little seat tuning by putting tape over some holes in the lid and go back and forth.

Kenny
 

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Get your clutch machined, make that one of your first mods.


Contact VForcejohn on this forum. "Interstate Motorsports"
 

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Get your clutch machined, make that one of your first mods.


Contact VForcejohn on this forum. "Interstate Motorsports"
A lot of the threads say cutting the primary only helps for top speed is that correct or does it help all through the power band---Thanks

Kenny
 

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Discussion Starter · #6 ·
Thanks eveyone. I am getting alot of stuff from John already. Anyone know how much it costs to get the clutch machined?

Trying too keep costs to a minumim for now till some other things are all paid for.
 

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If I was in your position, I would spend my $$ on Exhaust-12 hole-twin air filter- and UPP or equivelant ms mod intakes And of course jetting for this. These 4 things will be your best power to $$ ratio that you can do to a stock internal V. You will really notice the power increase with these add on's.
When you get this done then I would consider a clutch.

Just my 2cents.
 

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Discussion Starter · #9 ·
Thanks again. I was wondering what stock Pilots and main jets are? I am really good at jetting just new to this car.
 

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Thanks again. I was wondering what stock Pilots and main jets are? I am really good at jetting just new to this -----CAR??????
What they are or where they are----Think you mean where-----They are on the right side of your carbs, (as you sit on the bike), they are inside the float bowl area---Each float cover has 4 philips screws, (which are very soft)---Inside mains are to the right and pilots to the left in each carb---Both have flathead screwdriver openings.

Kenny
 

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Discussion Starter · #11 ·
Sorry I ment to say carb. I know where they are but after research I found out stock pilots are 40s so I am going to 42s just because its already got a lean pop that was almost sorted out with the air/fuel mixture screw but on start up it needs more fuel as well. Also gonna get some shims for the needles. Anyone know what needles you can run?
 

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Just a FYI - the Prairie stacks will only fit if you use the TwinAir Powerflow air filter; they won't fit inside a factory style air filter.
 

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Update your sig on the V as you change things---I am interested as to how it will perform with the 42 pilots---Also stock needles with a #4 washer or a Keihin spacer.

Kenny
 

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Discussion Starter · #14 ·
Will do for sure.
 

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Prairie stacks?? what are these? Ya Im a newbiwe too.
 

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You replace the velocity stacks on top of the carbs with ones from a '02 Prairie (they are straighter and larger than the stock V-Force ones). They will only fit in the TwinAir Powerflow air filter. Gives you a little more power. Do a search on "prairie stacks" for several threads about them.
 

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Thank You!!
 

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Hey 4stroke:p:p---Welcome to KR---Most of the guys on here will recommend the Twin Air Power Flow Kit---It's $89 at Rocky Mountain ATV----Jetting from 178-185---Start with 180 front and 182 rear---You can do a little seat tuning by putting tape over some holes in the lid and go back and forth.

Kenny
OK, I just went from 150/155 to 155/160 this last weekend, after I added the 6* key. You think it needs even more fuel? (this was on the green quad)
 

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Hey 4stroke:p:p---Welcome to KR---Most of the guys on here will recommend the Twin Air Power Flow Kit---It's $89 at Rocky Mountain ATV----Jetting from 178-185---Start with 180 front and 182 rear---You can do a little seat tuning by putting tape over some holes in the lid and go back and forth.

Kenny
OK, I just went from 150/155 to 155/160 this last weekend, after I added the 6* key. You think it needs even more fuel? (this was on the green quad)
Don't understand the 42.5 pilots, (40 or 42)--Did you put 2 washers on each needle or one on each---He's opening his air box so that's why 180's---42 pilots and 2 shims on each seems rich for low and mid range---I don't think you have enough air flow for larger mains.

Kenny
 

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Hey 4stroke:p:p---Welcome to KR---Most of the guys on here will recommend the Twin Air Power Flow Kit---It's $89 at Rocky Mountain ATV----Jetting from 178-185---Start with 180 front and 182 rear---You can do a little seat tuning by putting tape over some holes in the lid and go back and forth.

Kenny
OK, I just went from 150/155 to 155/160 this last weekend, after I added the 6* key. You think it needs even more fuel? (this was on the green quad)
Don't understand the 42.5 pilots, (40 or 42)--Did you put 2 washers on each needle or one on each---He's opening his air box so that's why 180's---42 pilots and 2 shims on each seems rich for low and mid range---I don't think you have enough air flow for larger mains.

Kenny
It says 42.5 on the pilot jets, didn't know they should be whole numbers. I have several main jets also with.5 numbers. I've been running one "thick" washer, and one very thin washer on each needle on the green one, and one "thick" washer on each needle on the orange one. The orange has the stock air filter, the green has the K&N, that's why the difference in jetting. Both of them have the wall cut out of the airbox, and the stock snorkel removed. The green one has a scoop on the opening that runs out under the fender, the orange on has no snorkel at all. I plan to put the hose snorkel mod on both when I get a chance. I don't like the 12 hole mod, the air doesn't seem to be as "nice" there as what I'd like. I plan to pull from the top of the radiator to get the coolest air possible, and cut the hood open to collect outside air.

Eventually I'd like to have the Prarie stacks, twin air filter, and dual snorkels on the green one, and move the K&N to the orange one. This is because i think (no real proof) that the Muzzy pipe is slightly better than the FMF, and I don't want to have two identical quads with identical costs for new parts.

Any input is welcome
 
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