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Thread: 1991 Exciter Carb jetting & advice

  1. #1
    Junior Member Mini
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    Feb 2009
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    Quebec
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    Default 1991 Exciter Carb jetting & advice

    here's my dilemma:

    i just picked up a 91 exciter that needs a bit of work. keep in mind it has a bender pipe on it. i got it home and got it running but 3/4 - full throttle very rough operation and the engine misses. while the track was off the ground I held it wide open for 5-8 seconds while it was missing then flipped the choke. this had no impact on the way it ran. i then tried the same thing again, held it wide open for 5-8 seconds then turned the key off. i took out the plugs and they were wet and black. i'm thinking too much fuel on top end, main jet too big?? i removed the carbs and it looked like the pilot jets were partially clogged. the main jets i found installed were 320 and 42.5 pilot. the needle is clipped in pos 3 (1/2 way). i cleaned the carbs and re-installed them. here's the kicker. when it started now it revs very high and turns the track and little to no effect when applying throttle. i ran out of time to dis-assemble and look to see if i frigged something up, maybe i forgot to re-install a pilot jet? i didn't
    see one left on the work bench but i rushed the re-assembly and my work abruptly ended as i didn't have time to look around. any suggestions? what are stock jets? and what would be a good starting point for re-jetting with this bender pipe? i live at an alt of roughly 600 feet. thanks.

    ps, what a pain in the a$$ to remove/install the carbs on this tight fitted machine. i think next time i'll check to see how hard it is to remove the airbox first.

  2. #2
    Senior Member Stock
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    East Greenbush Ny
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    Default

    Make sure you put the slide back in correctly. I made the mistake of putting one in the wrong position during a clean. I had the brake on but still smoked the belt and threw my dolly from under the track b-4 I could kill it.

  3. #3
    Member Mini
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    Sudbury, Ontario
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    Default

    a good habit is to allways squeeze the throttle and release it to be sure it's functioning properly before starting any machine.

    especially after performing work on your sled.

  4. #4


    Default

    I have a 1992 Exciter LE with a Bender single pipe and I am about 95% positive I have 325 mains in mine and it rips pretty good.

  5. #5


    Default

    Make that 320 main jets in my Exciter II.

  6. #6
    Junior Member Mini
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    Default

    i found one of the carb slides not installed right, fixed that and it IDLES better. but i still have the origial problem. 3/4 to full throttle the engine misses, almost backfires and doesn't open up like it should. any ideas?

  7. #7
    Senior Member Improved Rustman's Avatar
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    waasis, NB
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    Default

    Check the choke circuit. Sometimes the plungers get stuck or fail.

  8. #8


    Default

    I'm thinking about trying 310 or 300 main jets in my Exciter as it as developed a bogging problem now that the weather has warmed up. I too have a Bender single pipe on my Exciter II. My sled always did have a bit of a "gurgle" at higher speeds, almost like too much gas.

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