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MX, SX & Off-Road Discussions
Dirt Bike Mods & Maintenance
99CR133....mid-top porting OR mo-better-everywhere
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[QUOTE="NO HAND, post: 208450, member: 18937"] The stock airboot will accept the 36 or 38 just as well. I know I have the 01cr250 airboot on my bike and the 00cr125 airboot fits well over even a keihin PWK 40mm. The one thing you have to change is the intake manifold to mach the brand of carb you are using. For Keihin carbs you have to use a 99 and older manifold. For Mikuni carbs you can use the 00 and newer manifold. Marcusgunby explained to me that Keihin carbs have a bigger outside diameter on the reed side and he is right, I found out by experience. It's not my business but if you plan on putting the 38mm carb you would do well to go for the mid-top porting because these two mods will work well together. If you ask for the lo-mid porting, I'd stay with the 36. [/QUOTE]
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MX, SX & Off-Road Discussions
Dirt Bike Mods & Maintenance
99CR133....mid-top porting OR mo-better-everywhere
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