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

Ty Tessmann, OS team driver, won 1/8 off-road World Championship in Sicily in October this year. In commemoration of his staggering victory, OS Engines are releasing Ty Tessmann limited edition 21 buggy engine. This is combo set B2101 engine / T2090SC muffler / M2002SC manifold.

Internal structure is the same as SPEED B2101. The different points are:

• Natural color head with black letters
• Engraved crankcase
• Engraved crankshaft
• Engraved muffler
• Carb restrictor is 5.8mm, which is not available in the market but only with this special edition. The 5.8mm restrictor was asked by Tessmann before the World Championship in Sicily and we specially supplied to him for the competition. He used it and won.
• T-2090SC muffler with M2002SC manifold complete set is not available in the market. M2002SC(code #72106480) is usually an optional part. M2002SC is longer than M2000SC. The longer manifold increases torque in low-middle range.
• So the combination of engine/muffler/manifold/carb restrictor is what he used in the Worlds and only available by this limited edition.

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
• Output: 2.61hp @ 34,000RPM
• Weight: 12.42oz (352g)
• Distance Between Mounting Hole Centers Same Side: 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 of engine
• Carburetor Settings: NOTE carburetor is preset at factory and requires only very small adjustments
• Needle Valve, 3-1/4 open from fully closed
• Mixture Control Valve, Flush with carburetor body
• Metering Needle, Flush with ball link body
• Throttle Stop Screw, Approximately 0.5mm