B-Stock - Carburetor RZT RVFK 21CS - for Simson S50, S51, S70, KR51/1 Swallow, KR51/2 Swallow, SR50, SR80

B-Stock - Carburetor RZT RVFK 21CS - for Simson S50, S51, S70, KR51/1 Schwalbe, KR51/2 Schwalbe, SR50, SR80 - Return = Assembly and usage marks present - externally a standard carburetor - internally a racing carburetor - CS = closed system - the supply of all auxiliary and compensating air occurs via the intake air path - additional jet in the auxiliary air channel - completely modified interior, optimized for higher air throughput - suitable for tuned 50cc cylinders up to large engines over 100cc - Perfect throttle response and peak performance with easy adjustability - Delivery includes: - Carburetor - 4 additional main jets - 1x insulating flange gasket - Assembly instructions - Technical data, optional accessories, and changes from the predecessor: - Passage: 21.0mm, closed system - Designation on housing: 16N1-11 - Main jet: RVFK 96, 100, 104 (installed), 108, 112 - Jet holder: RVFK 62 (installed) - Needle: RVFK 48J20 (installed) - Atomizer: RVFK - Slide: RVFK 50 - Bypass screw: 2.5 - 3 turns open - Housing casting quality improved, especially in the area of the larger slide (cap thread) and the carburetor bowl - Carburetor material improved - more homogeneous, pore-free casting - extended idle jet to reliably draw in even at low fuel levels - Side marking 16N1-11, the carburetor size is inconspicuously marked in the choke area - Note: - this carburetor is also usable for KR51/SR50 - the fuel hose must be laid in a loop here to avoid a kink above the straight connection stub - when adjusting the nipple for the throttle cable on the carburetor cap, the small counter nut must be removed and then the nipple completely screwed into the cap - the throttle cable play should then be adjusted there via the length adjustment in the throttle cable