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Old 01-05-2010, 07:51 AM   #1 (permalink)
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1987 Arctic cat Jag 340

HEy Guys I need to clear up some information on my arctic cat jag 340 Carb. I have looked on the parts websites for my year sled and carb and it says a main jet of 300... The chart on the sled itself says there is a stock 200 main jet in the carb and shows different latitudes and different main jet sizes. Which jet size is the correct one? I would like to know this because I have the air box removed and it seems like the sled is not getting enough fuel at WOT. Thanks
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Old 01-05-2010, 08:24 AM   #2 (permalink)
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With the airbox removed the sled will run leaner as the restriction of the airbox isn't there... Put the airbox back, its there for a reason. Otherwise you'll need to go up in jet size but you'll need to figure out what jet on your own, theres no published number for the airbox being removed.

I think you ment altitude, latitude shouldn't have much effect on the carb. At higher altitudes the air gets thinner and for reasons I don't really understand you need to go to a larger jet. My 500cc '85 Panther wanted a 300 above 5,000 feet.
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Old 01-05-2010, 04:43 PM   #3 (permalink)
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Yeah I meant altitude lol.... The air box was removed when i picked up this sled. I am just worried about the difference in main jet sizes that the chart on the sled gives me and the actual parts diagram 200 and 300 are a huge difference. I was hoping someone with this year sled could let me know what they think thanks!
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Old 01-05-2010, 05:32 PM   #4 (permalink)
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Once the airbox is off the chart is meaningless... Run it and inspect the plugs, adjust the jet size as needed.
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Raising sleds from the dead in north central MA.
'70 Ski-Doo Olympique 12/3 - The Yellow Bullet
'71 Arctic Cat Panther 303 - Wankle Panther
'78 Arctic Cat Pantera 5000 - Back from the dead!
'79 Polaris Cobra 340 - Back from the dead!
'95 Ski-Doo Grand Touring SE 670



www.deadsledwrenchers.net
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Old 01-05-2010, 05:58 PM   #5 (permalink)
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Yeah I understand this I am not going by the chart to change my jet size with the air box removed. I am just trying to figure out what is the size of the stock main jet. I know how to do a plug chop but I want to purchase jets that are in the right range. Like i said Arctic cats parts page says main jet 300 Babbitts Sports Center | Arctic Cat OEM Parts | Can-Am (Bombardier) OEM Parts | Honda OEM Parts | Kawasaki OEM Parts | Polaris OEM Parts | Sea-Doo OEM Parts | Ski-Doo OEM Parts | Suzuki OEM Parts | Yamaha OEM Parts
My chart on the sled says stock is 200....
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