If you think your carbs need cleaning, try this first. Yamaha makes a product aptly called "Carburetor Cleaner"…comes in a large plastic bottle (not aerosol). I’ve had very good luck resurrecting dirty carbs WITHOUT disassembly using this product. When it works, this method saves time, effort and expense. Best of all, you don’t need new rubber components as you do when the carbs are taken apart.
Master Carb Kits
Idle tuning & CX500 Mixture Screw variants
CRC 05379 12 oz Clean-R-Carb Carburetor Cleaner
Dime City Cycles Blog
Carburetor Clean up. –
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CRC Clean-R-Carb Carburetor Cleaner (50 State Formula), 12 Wt Oz, 05379 : : Automotive
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There's No Better Time To Clean Your Carbs Than Winter
New Owners Randakk's Blog
Weber IDF 40 double-barrel carburetors, clip-on bars
Lowbrow Customs - S&S Super E and G Carb Extended Float Bowl Screws - Brass 003827