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OS Speed 21 XZ-B L-OS12186
OS Speed 21 XZ-B L-OS12186 - view 1OS Speed 21 XZ-B L-OS12186 - view 2
OUT OF STOCK

OS Speed 21 XZ-B L-OS12186

Quantity:

£359.99

Out of Stock






Countless champions, including Mark Pavidis and Atsushi Hara, have trusted O.S. Speed engines to give them a competitive edge. Now, O.S. is proud to continue that winning tradition with the 21XZ-B Speed! A specially designed black-anodized cylinder head improves cooling and reduces weight, while an upgraded, DLC-coated crankshaft improves fuel flow. It all adds up to yet another exceptional, Speed tuned engine from O.S.

* Unparalleled, speed-tuned power characteristics.
* Lower fuel consumption which offers 8% longer run times than the standard 21XZ-B.
* Race-proven 3-port sleeve with special Speed version inner head and porting for smoother acceleration.
* Tough, DLC-coated crankshaft features a silicone-filled intake passage for improved fuel flow.
* New 21J2(B) three-needle carburetor includes 6 mm, 6.5 mm and 7 mm restrictors for fine-tuned control.
* A lowered center of gravity provides steadier vehicle handling.
* Long stroke allows for superior torque.
* A black anodized crankcase with ceramic ball bearings helps reduce resistance and increase performance.

Displacement: 0.21 cu in (3.5 cc)
Bore: 0.6 in (16.3 mm)
Stroke: 0.7 in (16.8 mm)
Output: 2.6 hp @ 34,000 rpm
Practical RPM: 4,000-40,000
Weight: 12.5 oz (355 g)
Includes: 21J2(B) carburetor, P3 glow plug, 6.5 mm carb restrictor, exhaust seal and dust cap set
Requires: Glow fuel, muffler, tuned pipe and manifold

Alpha F850 Red Head Engine 3.5cc
Alpha F850 Red Head Engine 3.5cc - view 1Alpha F850 Red Head Engine 3.5cc - view 2

Alpha F850 Red Head Engine 3.5cc

Quantity:

£124.99

In Stock








Alpha RC's new range of well priced, high quality, high performance engines have been incredibly well received throughout the world on there debut. Despite Alpha RC being a very new company to the RC industry the foundation of the company is built on many years of nitro engine reasearch, development and expertise. Consequently, since there original debut each and every one of Alpha RC's range of engines have been very highly regarded by racers of all levels.



The Alpha Plus F850 is the ideal club racer engine, featuring a 5-Port construction the engine provides excellent bottom end to mid-range power, with a good ammount of top end RPM. Overall however the engine feels rather linear, controllable and retains a good fuel economy over its quicker counter parts in the same range. This then would make an great choice for 1/8 buggys for use on small tracks, or drivers just initially stepping up to the power of a true .21 race engine.
Each engine comes complete with a 0.10mm head shim which is necessary for operating the engine on 30% fuel and a set of 2 alternative carb restrictors, to help further tune the engines power and economy.



21-BT5PA(F850)
Displacement------------3.45cc
Bore----------------------16.3mm
Stroke--------------------16.8mm
Carburetor Dia-----------8mm (Variable)

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