CALL FOR JET SIZING- Call or contact us to discuss your expected riding conditions so we can help you choose the best jets for how and where you will be riding. We keep all or most pilot jet sizes in stock.
See part #10 on the exploded view.
PWK 28s are great for the 350cc engines. The bigger the carburetors, the more top end but less bottom end, so it depends on what the rider is doing. PWK 28 carbs usually work well for 350-400cc Banshee engines. A slow jet #48 usually works well for the PWK 28s.
PWK 35 carbs work well with a 421 Cub Banshee engine. Generally, the sweet spot for slow jets on the PWK 35s will be #48-55. To be safe, it's best to start at #55 and work your way down until the spark plug color indicates proper jetting.
Slow jets above #55 are generally for larger or higher compression Banshee engines.
What does the jet size mean? For Keihin carbs, the jet size refers to the metering orifice diameter, expressed in millimeters. A # 100 jet is 1.00mm in diameter. A # 38 Jet is 0.38 mm in diameter. A #35 jet is 0.35mm in diameter.
Blog Post: Banshee Spark Plug Conditions
Keihin makes these jet sizes for the pilot or slow jets:
#35
#38
#40
#42
#45
#48
#50
#52
#55
#58
#60
#62
#65
#68
#70
#72
#75
#78
#80
Keihin N424-21-xxx , SLJ00004 to 22
