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These historical Keihin N502-16 throttle slides are listed for standard non-Air-Striker PWK35 carburetors. Each slide controls airflow and carries the jet needle.
Dropdown numbers are the historical application-chart labels, not measured cutaways or confirmed physical stamps. Order 018-514 is labelled 8.5 in the application chart and 8.0 in the price list. Match the full part number; current N502-15 replacement-family measurements do not establish the dimensions of these historical slides.
- Diagram reference — Standard PWK35: 13
Standard throttle-valve setting: standard non-Air-Striker PWK35/70R, carburetor order 016-150, is listed with a No. 6.0 slide. Select the 6 nominal option, N502-16E03, order 018-512. This is the historical catalogue setting, not a newly verified measurement of the slide. PWK35/S65 Quad Vent / Air Striker instead has a catalogue-standard No. 4.5 slide in the separate N502-15 family.
Rich to lean: the dropdown is ordered from the lowest slide number first to the highest last (0, 3, 6, 7, 8.5, 9.5). Within the same compatible slide family, a smaller cutaway gives a richer mixture and a larger cutaway gives a leaner mixture as the throttle opens. No. 0 is the richest end of the range; No. 9.5 is the leanest listed end where offered. Slide ID marks, nominal catalogue numbers and actual cutaway measurements are distinguished above; numbers from different slide families are not interchangeable.
