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

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

Internal framework is the same as SPEED B2101. Different points are:

• Natural color mind with black colored letters
• Engraved crankcase
• Engraved crankshaft
• Engraved muffler
• Carb restrictor is 5.8mm, which will be unavailable in the market but only with this particular unique version. The 5.8mm restrictor ended up being asked by Tessmann before the planet Championship in Sicily so we especially supplied to him for the competition. He used it and won.
• T-2090SC muffler with M2002SC manifold complete set just isn't available in the marketplace. M2002SC(code #72106480) is generally an optional part. M2002SC is longer than M2000SC. The longer manifold increases torque in low-middle range.
• So that the combination of engine/muffler/manifold/carb restrictor is exactly 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 motor
• Carburetor Settings: NOTE carburetor is preset at factory and requires only very small corrections
• Needle Valve, 3-1/4 available from fully closed
• Mixture Control Valve, Flush with carburetor body
• Metering Needle, Flush with ball website link human body
• Throttle Avoid Screw, Around 0.5mm