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HCS Snowmobile Forums > Snowmobile Forums > Ski-Doo General Discussion > MACH Z

blk f1000
looking for a harder spring for 99 machz looking to engagment 6000rpm finishing 9300 rpm with 16.5g pins can anyone tell the stock spring rates for 99 and 05 and newer.
22Ski-doo
'99 200-290 P/N 414 768 200
'05 200-320 P/N 414 762 800
'06-'07 230-350 P/N 415 074 800
blk f1000
thanks I'll give the 06 spring a try
zzzman
You will probably need a primary spring with a rate/pressure 310/460 or 310/510
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