Jetting Specs- 03 CR85

[Brian]

Just picked up an 03 CR85 as a playbike. It has had the cylinder recall done already, so that should help with jetting cleanliness. I haven't touched anything yet, but I do know that the bike has the stock needle in the #1 clip position (one clip lenaer than stock) with the stock main and pilot jets. I have the AS set at only 1/2 turn out because it has a slight lean bog with any more turns out, so I guess I'll go up one size on the pilot to help that, and then adjust the AS accordingly. I really can't complain with the way the bike carbuerates, as it runs pretty cleanly as is. My main concern is the two plugs I have fouled on cold start-up. This contradicts my thought of richening the pilot circuit, though. I probably half-caused this by trying to clean the bike out before it was warmed up enough, but I have my 250 jetted properly and it has never done this? The bike also sounds like it bogs (not a lean bog sound, more of a flooded and won't start sound) when started sometimes. It also likes to bog/cut out sometimes when lugged way down. I am unfamiliar with small-bore two-strokes like these, and it is hard to tell if this is just the way they sound, or jetting may be off? Any advice is appreciated
Thanks
Brian

 

[husabutt]

Most of these mini's seem to be jetted too rich on the needle. Since the needle controls 1/4 to 3/4 throttle it is the most used jetting circuit. This thread lists the stock Honda needles and the optional ones. If your plugs are wet or fouling there is a good chance you could benefit from trying the optional leaner needles from Honda.

http://dirtrider.net/forums3/showthread.php?t=131634

On our YZ85 we actually went richer on the pilot but way leaner on the slide and needle. One size leaner slide with the Kawasaki NAPE needle. This added a bunch (for a 85) of low end.