summatyme29

I have a trouble shooting question for the tech experts.I have a 340 arctic cat jag that bogs out at top speed.It seems like it is running out of fuel at top speed bogs out almost to the point where it will quit.If you let off the throttle it springs back to life and takes off again.Half throttle or less works great.I have replaced EVERYTHING with reguards to fuel,pump,lines, carb kit.Could the CDI be crapping out and cause this behavior.Any info always appreciated.Thanks Summa

Lynx300

I don't know about on cats, but on mine, I tightned the air mixture screw on the carb until seated, then out 1 and 1/2 turns, then went a little either way until it didn't bog any more.

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1973 Ski-Doo Elan 250-mikuni carb, running well
1978 Moto-Ski Mirage with a 440 Sno-jet motor -died

now working on a LITTLE project

smallengineguy

High speed bog is caused by too small high speed jets in the carbs. You can go up one size and see if that helps. Just remove the carb bowl drain nut to change it

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1992 Ski Doo Mach 1 (SC-10/2 suspended) March '07 SF.com Sled of the Month!
1993 Ski Doo Mach Z 780 triple
2001 Ski Doo Mini Z



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