Which type of primary clutch comes stock on the 98xc700? What kind of kit(what springs and wieghts and such) should i put on it to make it more snappy out of the corners and reall quick on short straights? What secondary changes should I make also? I dont want this thing tearing up a tone of belts though. Along with studs i want it to do a wheelie! :div20:

all polaris parts,tryed and proven by MANY:
alm/gold pri,,10-62 weights ,r-12 helix,,sil/blue sec.

this is pretty much the best kit you can throw together for price and performance

What XC Special said, unless you have an 824 motor. Then use an almond/blue in the primary and shoot for 8000 rpm.

How much are different primary springs usually and how much do you think it would cost for that set up for both clutches?

Primary springs are about $20. The whole kit your looking at about $150. Find some good shape weights and helix and save yourself some $. I might have that helix you need in the garage.

Right now I have 10-60 weights and a blue pri. spring. I have no idea what is in the sec.clutch though. I haven't taken it apart yet. Right now I dont think this setup is doing anything for the quickness part I want. It engages at 4500rpm(dont know if thats good or not and not sure how much higher engagement the engine likes) Input is much appreciated thanks! :div20:

is 4500 rpm engagement normal???

Your secondary should have a stright 36 deg. helix and a silver secondary spring. Check the base of the cylinder for the part # if the last three numbers are 220 the Almond gold spring is popular ( however I have no tuning experience with the 220) If they are "824" get an Almond/Blue Polaris spring, 10-62 weights and an R12 with a Polaris Silver/Blue. Good all around set up.

I have had both versions '98 XC7 in the past - my personal best was the 220 version. Stock clutching for XC7 is dark blue, 60g, 36 degree straight with Polaris silver.

if this motor is a 824 version:

62g w/ EPI red
50/36 (r12) with EPI silver
Motor sings best @ 8k


220 version is a stronger low-end grunt

64g w/EPI red
50/36 w/ EPI silver
motor sings best no higher than 7.8k

I wouldnt engage any higher than 4k since this 220/824 has plenty of torqe so engage them at LOWER revs. Plenty of tractions is a must!!!
-WL-

If your clutch is engaging that high something is binding in the primary, if that is a stock dk blue spring, and the weights are not notched, or the heels cut.

220 version is a stronger low-end grunt

64g w/EPI red
50/36 w/ EPI silver
motor sings best no higher than 7.8k

I wouldnt engage any higher than 4k since this 220/824 has plenty of torqe so engage them at LOWER revs. Plenty of tractions is a must!!!
-WL-

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I know I have the 220 cylinders and the dark blue primary spring with 10-60 weights. I thought you needed higher engagment for more torque and quickness off the line but if its a lower engagment you need for more quickness ill try the set up you suggested. Thanks. but you also say that the 220's are stronger in the low end but it seems like mine struggles for a little until you get going then it clears up. Can you recomend anything else that will help that because after that is fixed along with a good clutch set up (hopefully this one) I want my sled to be way quicker out of the hole. Thanks for the advice i appreciate it.

Polariskid98 - if you want quicker out of the hole, lower engagement is a way to go. Higher engagements will make your track spin more before able to hook her up. If youre experiencing low-end stubles, ask pockets - he knows more about carberations work better than I do. OR, add boost bottle to clean up the low end garbles. WL.

with the Keihn carbs on a 98, a boost bottle and v-force reeds helped a lot with the bottom end, along with CCL carb needles {there are other needle's also that help} CCL's are what I used in my 98. every time this thread comes up, I think about how much fun, and how much I miss my modded 98 XC7 220 sled

It sure fun racing the good ol' USA motor, was it racerdave? :beer: Also racerdave brought up a good point - for 220 version, a set of Delta VF is good for additional 5hp gain. WL.

Heres to the 98 XC7 220 motor sled: Long live the King!

:beer2: :wanna_race: :div20: :banana: :4th2:

:div20: :div20: :div20: :div20: :div20: :div20:

After taking the sec. apart enough to see the spring it's yellow(not sure about the helix). What is that spring doing for my setup?