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Honda MX & Off-Road Dirt Bikes
Attn: 2002/2003 CR250 Keihin PWK Converts
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[QUOTE="Faded, post: 672572, member: 38322"] James, Thanks, I appreciate you checking. From what I can gather the bike's stock jetting is good for near sea level. Throw some elevation into the mix and things start to get a little challenging. I've noticed that those bikes that I've kept tabs on all share almost the same problems and that is they're rich everywhere except a lean spot at just off idle to 1/4 throttle. Even modified mine exhibits the same traits, only worse. Stock this problem is masked by the stock pilot size, which was rich for me (and you too I noticed), and the overlap takes care of the lean spot but makes for slow revving off idle. So you drop the pilot, raise the clip (or worse, buy a [i]leaner[/i] needle), swap in an S-8 and lower the main and all the sudden you have a hesitation at just off idle (or like mine which [b]pings[/b]). If this is the case then a richer needle will do, problem is I'm at Honda's richest needle, 30-71...I called to order the 30-70 and, ummm they don't make that one. Now I'll be trying a richer slide with one of my needles to see if I can't make it work. If this sounds like what you might be experiencing then the 4.0 slide will probably help you out. Of course being 4000ft closer to see level than I am might be enough that you don't have this problem... :confused: [/QUOTE]
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Dirt Bike Discussions By Brand
Honda MX & Off-Road Dirt Bikes
Attn: 2002/2003 CR250 Keihin PWK Converts
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