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Discussion Starter #1
I have a 2006 articat 650 h1 I recently purchased. It has a snorkle, hmf exhaust with stock carb jetting. It's running real lean. What would size jets should be in it?
 

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How do you know it’s running lean ?
 

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Could be plugged spark arrestor as well. They are jetted pretty fat from the factory. Best bet is a dyno jet carb kit. Makes a really nice improvement. Just to have the adjustable needle is worth the cost of the kit that comes with multiple jets.

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Discussion Starter #5
I will check spark arrestor. On the adjustable needle could you use washers on the stock needle to adjust it?
 

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You can but it’s hard to get it right. The taper on the dyno- jet needle is what is so effective for very little money.
 

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Discussion Starter #7
Ok I have the needle which level should I set it for more fuel? Or is just adjust as needed?
 

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You bought the kit?
 

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Discussion Starter #9
Well finally figured it out there was a split in the purge line and the diaphragm in carb was not sealed. Running like a top now.
 
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