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post #1 of 5 (permalink) Old 03-27-2015, 06:56 PM Thread Starter
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Hey everyone

I have been around reading the forums here for a few weeks now so I figured I would make an account and join the action.. I bought a 01 660 about a year ago non running no intake no seat plastics busted all up so I put it back together but it backfires and falls on its face about 3/4 throttle .. I tried everything jets valve adjustment finally gave up and just rode it that way all last year. Well I broke it out a few weeks ago and rode decided the problem had to be in the carbs so I pulled them only to find my choke wad stuck this whole time. Ordered the parts waiting for them to come in hopefully that cures it but was just wondering where I should be jetting wise I'm in grand junction colorado right at 5000 feet. The motor is stock from what I can tell I'm running a k n air filter with a cut box so intake is modified I just want to make sure I'm at least close with the carbs before I rule them out if it's still doing it. Any help is greatly appreciated
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post #2 of 5 (permalink) Old 03-27-2015, 07:25 PM Thread Starter
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No lid also on the air box either
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post #3 of 5 (permalink) Old 03-28-2015, 07:04 AM
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aftermarket needles, 25 pilot jets, and at least 155-160 mains, being that high of altitude u may not need to run the 160-165 mains(staggered, the right carb runs a size bigger jet)
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post #4 of 5 (permalink) Old 03-30-2015, 10:41 AM
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Quote:
Originally Posted by Unpuritan View Post
No lid also on the air box either
At 5000 ft I'd just try larger mains... 150L 155R to start.

'01 660 Raptor, Burgard +2+1 arms, YFZ Shocks, LSR anti-vibe, CTR pipe, jetted, K&N
'01 Polaris Scrambler 400, K&N
'02 Honda 400ex, Big Gun pipe, jetted, K&N, Lonestar +2 A-arms, Lonestar anti-vibe
'04 Suzuki LTZ400
'16 RZR XP4 1000 Turbo

Last edited by QuadManiac; 03-30-2015 at 10:43 AM.
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post #5 of 5 (permalink) Old 04-07-2015, 10:15 AM Thread Starter
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Ok got her back together and it's a world better but still not right at full throttle its got a hesitation now just a slight hiccup as it enters the upper rpms I'm thinking it's got to be needles what position is what on them aka do I need to go up or down with them
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