High Performance Tuning Carburetor Simson Schwalbe S50 S51 S70 SR50 KR51

Performance Boost for Your Simson! – High Performance Tuning Carburetor VM20

The VM20 Tuning Carburetor for Simson Schwalbe, S51, S70 & Co. – More Torque and Higher Top Speed

Do you want to noticeably increase the performance of your Simson engine? The VM20 Tuning Carburetor offers significantly improved crankcase filling thanks to its larger diameter (VM20), allowing for higher engine performance across the entire speed range.

This carburetor is the ideal complement for tuned cylinders or simply to unlock the potential of your standard engine. It ensures faster throttle response and can contribute to an increase in torque and top speed.

Technical Details and Features

Product Details and Benefits

• Significant Performance Increase: Due to optimized gas flow compared to standard carburetors.

• Improved Throttle Response: For a sportier riding style.

• Robust Design: Known reliability of the VM type.

• Versatile Use: Ideal for original engines up to moderate tuning cylinders.

Important Safety Notice (Road Traffic Regulations - StVO)

Caution: This carburetor is a tuning part. Operating a vehicle with this carburetor that does not meet the original registration conditions leads to the loss of the operating license. The use of this part is not approved within the scope of the StVO and is intended only for racing or export purposes.

Extended Installation and Tuning Instructions

Since this is a performance-enhancing tuning component, careful installation and tuning are essential to prevent engine damage and achieve full performance.

Installation and Basic Setup

1. Intake Manifold: Ensure that you are using an intake manifold with a 36 mm connection diameter suitable for this VM20 carburetor. The standard intake manifold will not fit.

2. Sealing: Always use new gaskets and check the intake manifold for cracks or leaks to prevent the drawing of false air (vacuum leaks). False air leads to an extremely lean mixture and can cause piston seizures.

3. Cable Routing: Connect the throttle cable and choke cable so they operate smoothly and without binding. Check that the throttle slide closes completely when the throttle grip is released.

Detailed Tuning (Jetting)

1. Tuning Requirement: The carburetor is supplied with a basic jetting that almost always needs to be adjusted (tuned) for your specific engine. Correct jetting depends heavily on the installed cylinder, air filter, and exhaust.

2. Spark Plug Reading: Correct tuning is checked by the spark plug reading (plug chop method). The electrode and insulator base of the plug should be light brown after a short full-throttle run.

   • White/Light Gray: Mixture too lean (risk of piston seizure!). Increase main jet size.

   • Black/Sooty: Mixture too rich (loss of performance). Decrease main jet size.

3. Fine Adjustment: Always start with a main jet that is tentatively too large (rich) and slowly work your way down to the correct size. This protects the engine during the critical tuning phase. Subsequently, adjust the needle position (partial throttle) and the pilot jet.

Ensure the longevity and full performance of your Simson! Order the VM20 Tuning Carburetor now!