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RB Designs LLC
Machine Shop Services ~ Motorcycle ~ ATV ~ PWC ~ Small Engine ~ Custom Parts Machining
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Carb Mods
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Carb Mods: for the power where you want it!
From trail riding to the race track these great carb performance modifications are designed to help address many of the tuning and ride-ability issues that seem to be inherent to many of the two strokes bikes of today. Our goal is to give you that low end performance that you need and want, along with great throttle response right through a stellar top end.

Our precision machined and contoured Divider-Plates are permanently installed into the carb bore and it does not reduce the carb bore diameter in any way. Trail and Race Track Proven!
KDX 200-220 Carb
The Original Divider-Plate Modification!
These are brand new genuine Keihin or Mikuni carbs with the RB modifications and uses genuine Keihin and Mikuni jets.

Please Note! These carb mods require some basic jetting and fine tuning skills. Our carb mod will make your jetting and fine tuning much easier and more predictable for all your riding conditions and needs.
Carb Mod Accessories
Please feel free to Contact Us for more information
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NEW RD Carbs
Slide Mods