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I'm workin on a 99 xc 600 for a friend..Was wondering if anyone could help me with the stock specs for this sled..It's got the keihin carbs on it..I think that they richened them up slightly from 98-99 buts thats so long ago I cant remember..I'll also need clutch specs...How low is everyone jetting these things..He'll be riding at sea level and not want to rejet if it gets -20 below out...Any help would be greatly appreciated........
 

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185's were stock, you can also change the needles to R1371G #3, and adjust the air screws as needed. Stock clutching was 22/40 gears, dk. blue/white primary, 10-58 weights, R32 helix (50/34), and a silver secondary spring. Almond/gold, 10-60, silver/blue and a hot seat 34X works much better.
 
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