How should I set my carb for best performance?
Stock Walbro carbs should be set to idle clean and smooth but favor the rich side of the “window” for good throttle response. Set the high speed needle for the best performance over the entire race duration, keeping in mind you have to check your plug color occasionally. All pumper carbs must be set rich on the low side to provide good throttle response. This usually means they won’t idle without the driver applying some throttle. The high speed needle should be set for best performance. It is very important to monitor plug color and exhaust gas temperature. You have to ensure you don’t run too lean and damage your engine. Top When should my engine be serviced? There are several points to consider when deciding to have the engine serviced. • Generally speaking, a full freshen is needed after 10-12 races have been run. • Extensive testing has shown that after only 4 or 5 races power output is already starting to drop. This is usually caused by carbon deposits in the ports and head areas
