Carburettor 21N1-11 (BVF), TUNNING - Simson S51,S70

Full specifications

Carburettor 21N1-11 (BVF), TUNNING - Simson S51,S70

Note.: The BVF carburetor with more peak power due to a larger cross section of 21mm passage (22mm throttle) in a completely new housing (new mold). The BVF carburetor has a much better and cleaner mixture preparation (throttle response & part load behavior) due to a completely new part-load needle shape in connection with a suitable atomizer and nozzle. The BVF carburetor has a guided gas spring and housing cover with an O-ring seal, the clamping of the part needle has been improved (rattles no longer) and easier assembly. The float chamber has a separate drain with central screw. The gasoline connection is straight. The BVF carburetor has a 21mm passage and a 110 main jet. This is an original spare part.

Nozzle equipment:

• Main nozzle: 110
• Idle nozzle: 35
• Starting nozzle: 50
• Partial Needle 12 (normal)
• Needle nozzle 205
• Float needle valve 20

The float level must be set correctly to ensure the function in all load conditions! Closed state (28 + 1mm) / open state (34 + 1mm) see picture!

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