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Honda MX & Off-Road Dirt Bikes
'99 CR250: Taming the Hit
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[QUOTE="Faded, post: 786768, member: 38322"] Thank you everyone for the additional ideas. The gearing idea is a good though, and something we actually used to his advantage. Our Honda parts order finally came and I just finished the bike Saturday. I hadn't ever ridden it before and was just going off his comments on the bike. To make a long story short the PV actuator rod in the cylinder was pinched the last time "they" did a top end rendering the PV assembly unmovable and stuck in the 3/4's open position. After a minute of riding it prior to tear down I knew something was very wrong. :ohmy: The previous owner of this bike must have been a real piece of work. Not only did he mess up the PV, but the PV actuator rod in the case was set in the full open postion making it impossible for it to open when the revs came up. Also, he used a chisel/screw driver to pry the cylinder off the cases, causing an air leak and requiring 0.010" to be machined off the base of the cylinder (should help low end). Amazingly enough the cases weren't damaged. The left side crank seal was also shot. I am suprised this thing even ran as good as it did (which is terrible) considering the circumstances. With everything repaired it runs very strong off the bottom and is smoothed compared to what is was. It falls off hard on the top, but the main jet is definately too big for our elevation (175). I checked my notes on my '98 and I was running a 165 or 168. I'll step down to a 170 first, but will probably settle on the 168. The pilot is a bit rich (42), but helps my buddy out as he's still trying to adjust to the new found bottom end power. :) The gearing is 13/49 now, I thought that would help as confirmed by DBD. The old broken reeds were tossed in favor of Boyesen power reeds (dual stage fiber glass). The FMF pipe seems to be working just fine so we'll keep it for now. I still need to dial in the jetting, especially on top. Thanks again for all the suggestions and replies, I appreciate everyone's opinion. Take care, Andrew [/QUOTE]
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Dirt Bike Discussions By Brand
Honda MX & Off-Road Dirt Bikes
'99 CR250: Taming the Hit
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