OS Engines  |  OS1217E

O.S. Speed 21XZ-B Ty 110% Combo (L-OS1217E)


£516.99
RRP: £549.99
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This special 21XZ-B edition motor was built to Ty Tessmann's custom requirements in order to help him win of the world championships. Based on B2101, the heat sink head has a refined design for improved cooling during a race on Ty's request. It also uses a newly adopted 5.8mm reducer to improved fuel efficiency making a crusial difference over a long race. This combo set includes a matched exhaust set using a newly designed 90mm long manifold to give Ty the best fuel economy and a reliable stable idle to suit his tough racing requirements.

• 5.8 mm carburettor reducer for improved fuel consumption performance.
• This combo set adopts a 90mm long manifold, for fuel economy and improved idle.
• Silver anodized finish heat sink head designed exclusively for Ty Tessmann.
• Crankcase & crankshaft with laser etched Tessmann logo.
Specifications
Weight 356g (12.59 oz)
Displacement 3.46cc (0.211 cu.in.)
Bore 16.4mm (0.646")
Stroke 16.4mm (0.646")
Power Output 2.65 ps (2.61 hp) @ 34,000 rpm
Practical RPM 4,000 - 42,000 rpm
OS Engines

O.S. Speed 21XZ-B Ty 110% Combo (L-OS1217E)

£516.99
This special 21XZ-B edition motor was built to Ty Tessmann's custom requirements in order to help him win of the world championships. Based on B2101, the heat sink head has a refined design for improved cooling during a race on Ty's request. It also uses a newly adopted 5.8mm reducer to improved fuel efficiency making a crusial difference over a long race. This combo set includes a matched exhaust set using a newly designed 90mm long manifold to give Ty the best fuel economy and a reliable stable idle to suit his tough racing requirements.

• 5.8 mm carburettor reducer for improved fuel consumption performance.
• This combo set adopts a 90mm long manifold, for fuel economy and improved idle.
• Silver anodized finish heat sink head designed exclusively for Ty Tessmann.
• Crankcase & crankshaft with laser etched Tessmann logo.
Specifications
Weight 356g (12.59 oz)
Displacement 3.46cc (0.211 cu.in.)
Bore 16.4mm (0.646")
Stroke 16.4mm (0.646")
Power Output 2.65 ps (2.61 hp) @ 34,000 rpm
Practical RPM 4,000 - 42,000 rpm
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