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I have a 2000 mxz 700 ,and i need some advice on making this thing go alittle better but dont want to add pipes.I was thinking on jetting or clutching.I want to stay in the safe range though
KEEP GETTING BEAT BY A 98 XC700 AND IT REALY BURNING MY ###
 

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xchaserx, I would be very careful with jetting on the 2000.  Mine came jetted extremely well from the factory.  I have gone down 1 size to 270's, but make sure you do plug checks and piston wash checks.  You don't want to squeak it.  I ran in -20F in Canada last year with stock 280 jets and it was spot on.  I clutched mine with a 54-48 helix, Goodwin blue secondary spring, primary spring  230-350, 287 ramps, and 17.4 grams of pin weight.  This setup made my sled 2-3 sled lengths faster than stock.  I weigh 180 lbs, if you weigh more you not be able to pull the 54-48 helix.   I also have a set of brand new Crankshop pipes for sale in the classified section if you want to make that thing really fly.  Good luck.
 

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BellevilleMXZ, when I say, " you may not be able to pull it" means too much helix.  52-48 might be better.  You may not be able to pull that much helix.(54-48)
 

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kid is right I would not jet down to much without putting reeds in.I run(w/boyesson reeds) 260's until 0f then I will go up to 270's at 20 below I might run the 280's never see them temp's when I ride so I am not sure.but I know with the stock reeds it was spot on at 4 below with the 280's(which are stock).
 

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Ok, but what will you actually see when riding if it won't pull it? too low of an RPM out of the hole for a ways??And what helps top speed, more or less helix angle?
 

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I tried a 26 top gear, but didn't seem to make any difference.
This is the combo I have now. 26/44, 287 ramps,rest of primary stock(200/320 spring), 50/47 helix, new beige at B6,any comments on this?? I tried both the 127 and the 067 belt, and the 067 seems a little faster top end, but the 127 hits harder on the trails, so depends on what you want I guess. the Sled DOES work good, raced a buddy on his MachZ on sat. I get him out of the hole,and it takes him 500 feet of so to catch up, and then he slowly goes by, and at 100mph he is about 3 lengths ahead.He used to go by this sled good at 300 feet before.I think I'm going bach to the 25 top though, killed some low and midrange by going to the 26.Oh and what will I see by not being able to" pull the helix"?? I think the Cudney kit for mine used a 55/47?? Thats a big difference from stock!!
 

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BellevilleMXZ, I would talk to Bill Cudney about what you want to do.  Bill just won the ice drags PS 1000  up north you know.
 
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