This is O.S. Engine O.S. Speed 21XZ-B TY 110% w/ T-2090SC Offroad Engine Combo Set. 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.
For: Nitro RC
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.
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
O.S. Engine O.S. Speed 21XZ-B TY 110% w/ T-2090SC Offroad Engine Combo (1 set)