O.S. Engine OS-1A203 - O.S. Speed B2101-TY w/T2090-TY Header and Silencer  [OS-1A203]

Ty Tessmann, OS group motorist, won 1/8 off road World Championship in Sicily in October in 2010. In commemoration of their staggering success, OS Engines are releasing Ty Tessmann restricted edition 21 buggy motor. This is actually combo set B2101 motor / T2090SC muffler / M2002SC manifold.

Internal framework is equivalent to SPEED B2101. The many points are:

• Normal color mind with black colored letters
• Engraved crankcase
• Engraved crankshaft
• Engraved muffler
• Carb restrictor is 5.8mm, that may be not available in the marketplace but just making use of this excellent variation. The 5.8mm restrictor finished up being expected by Tessmann ahead of the world Championship in Sicily now we especially offered to him your competition. He attempted it and won.
• T-2090SC muffler with M2002SC manifold complete set will not be easily obtainable in industry. M2002SC(code #72106480) is generally an optional component. M2002SC is considerably longer than M2000SC. The longer manifold increases torque in low-middle range.
• So the combination of engine/muffler/manifold/carb restrictor is what he based in the Worlds and just available by this limited version.

Spec:

• Displacement: 0.211 cu in (3.46cc)
• Bore: 0.646" (16.4mm)
• Stroke: 0.646" (16.4mm)
• Practical RPM: 4,000-42,000 RPM
• Production: 2.61hp @ 34,000RPM
• bodyweight: 12.42oz (352g)
• Distance Between Mounting Hole Centers identical component: 0.83" (21mm)
• Distance Between Mounting Holes Opposite Side: 1.4" (37mm)
• Height Bottom of Mounting Tabs/Top of Cylinder Head: 3.2" (82.6mm)
• Width of Mounting Tabs: 1.8" (45mm)
• Distance from Backplate to Front Bearing: 2.5" (64.5mm)
• Distance from Center of Crankshaft to Front Bearing: 1.7" (44mm)
• Distance from Center of Crankshaft to Backplate: 0.81" (20.5mm)
• Crankshaft Size: UNF1/4-28
• Crankshaft Length: 1.2" (29.5mm) outside motor
• Carburetor Settings: NOTE carburetor is preset at factory and needs just tiny modifications
• Needle Valve, 3-1/4 available from completely closed
• Mixture Control Valve, Flush with carburetor body
• Metering Needle, Flush with ball hyperlink body
• Throttle Avoid Screw, pretty much 0.5mm