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new to me 250 XCF-W jetting question for 9,500-13,000 ft

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Getting ready for first trip with the new (to me) 250 XCF-W  and I have a jetting question. It is supposed to be stock. I pulled the jets and have a 45 pilot and 168 main. Think that means the pilot is not stock ? Not sure what needle is in it but I would guess stock since the 168 is the stock main I believe.  Clip is in the third slot from the top.

Anyway, going to Colorado, staying at about 9,500 ft and riding up to about 13,500. From posts on here, I am thinking a 162 main but where should the clip be on the needle ? 2 grooves from the top ?

thoughts ?

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Move the clip to the 4th slot and run 168 main with 40 pilot, that would be stock jetting

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Move the clip to the 4th slot and run 168 main with 40 pilot, that would be stock jetting

 

Thanks.  That will help for getting back to stock.   What I am really looking for right now is a recommendation for riding at 9,500 to 13,000 feet.

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Correct me if I am wrong anyone, but the higher altitude means that air is less dense, reqiring less fuel to achieve the optimal air/fuel mixture. So my guess would be that the stock jetting would be sufficent.

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stock jetting will be too rich.  You can do that on a 450 or bigger but not on the smaller ones.  You need to reduce the amount of fuel going in to compensate for the thinner air.  I am trying to see if anyone knows how much.

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