Reed Adjust

"Dear Ralph" March 10, 2006 0
Dear Ralph: I have recently purchased a 2005 Ski-Doo REV 600 carb (new) although my brother has the 2006 SDI 600. You can imagine...

Dear Ralph:
I have recently purchased a 2005 Ski-Doo REV 600 carb (new) although my brother has the 2006 SDI 600. You can imagine the competition. I started with Boyesen power reeds and lowered the mains from 380 to 360 although I did not run the sled before doing this. I now have a bog when I hit the throttle from idle. Of course, like everyone else, I want my sled to scream at the slightest touch of the throttle. Can you
help?
Gene in Wisconsin

Installing the Boyesen reeds tends to make the jetting slightly rich. Since you’re experiencing a bog right off idle, you want to be looking at the pilot circuits. Index the pilot air screws (count how many turns in it takes to lightly seat them) and then set them a quarter or half turn out from where they were. This will lean the pilot (low speed) circuit some, and should wake it up. If you end up more than two full turns out from lightly seated, you might need to install smaller pilot jets, but normally tweaking the air screws out is all it takes – assuming the reeds are the cause of your bog. Being the sled is new, the drive belt should be in good conditions (not worn and narrow) and the belt deflection should still be tight, not loose, because as the belt wears and drops down into the secondary the sled will act like it is starting out in a higher gear ratio, and you guessed it; it bogs.

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