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

Name: O.S. Speed 21XZ-B Ty 110% Combo L-OS1217E
SKU: L-OS1217E
Availability: BackOrder

Original price was: £549.99.Current price is: £494.99.Save £55.00

Out of stock Product is not in our store or currently available from our supplier. The item can still be ordered but lead times will vary.

Description

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

This special O.S. Speed 21XZ-B Ty 110% Combo 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.

Specification

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