Here is the info on the RBD carb mod for the 250/300 Gas Gas...
http://www.rb-designs.com/
Quote:
Carburetor Modification for the gasgas 250 and 300 includes;
Boring carb to 39 mm (gives you a better top end)
Installing divider plate (gives that low end response, like a smaller carb)
Modify slide (do not forget to send your slide with your carb)
Install new needle (gives the carb that personality)
Change jets (if necessary)
Modify jet block (helps with the over all performance)
Modify low speed circuitry This part of the modification along with the other mods really brings the air mixture screw into play. With only very small adjustments, you can keep your bike running at its peak as you change altitude or with weather changes during your ride.
Price is $165.00 US Funds and includes return shipping & Handling in the USA
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