I am running my old ZRT 1004 with the stock carbs and gears. I want to pick up some top end, and was wondering about who bores carbs, and what gears to run?
Thanks

Mike call me, from Moose Lake, remember?

I got a set of bored carbs i'm thinking about selling if interested, their flat slides bored from 38mm to 42.5 used very little because of the mileage i was getting trail riding, if you run bored carbs their great for racing but suck for trail riding, its a night and day difference in the mid range and top end with the bored carbs :div20:

I run 39.2mm oval bored carbs,they work fine for trail or race,very responsive.

Me too. I mostly trail ride. Heads also are cut to min spec on squish.
We used to call this a "tuneup" head cut. These two mods are very
trailable.

Who does the oval boring ?????

how much did you take off the heads?I took off .010, comp is 145, and squish is abot .070

I'm a tool & die maker by trade and do all machine and cnc work.oval boring machines only the upper half of carb,no loss on bottom end.more flo wide open.

I don't recall, the amount milled except that it was enough to set the squish to minimum spec per Arctic Cat's spec sheet.

Mike
Do you still have the 1004 for sale

Thanks Deomont
PM me

The squish was set to .070" clearance.