OS ENGINES DECAL SHEET.

9MM CARB VENTURI (All OS 21 On Road motors)

OS .21 Piston Circlips x6

• VSR01
• VSR02
• VSPTO01
• VSM01
• OS R2101
• OS R2102
• OS R2103
• OS R21 EURO
• OS 21XZ-R
  OS 21XZ-GT

ength: .53" (13.5mm)
Diameter: .16" (4mm)

OS Exhaust gasket 21 BLACK (10)

REAR MOTOR COVER O-RINGS (2101/2103/2104 etc)

23730050

OS R2101 & R2102 Liner/Piston and Rod Assembly.

Displacement: 3.49 cc
Bore: 16.08 mm
Stroke: 17.2 mm

OSSPEED OS12 CONROD 1202/02/03/04

OS 1202 LINER/PISTON & ROD COMPLETE

Replaces(compatible) reference 21817010

GENUINE OS GLOW PLUGS.

No' 7 (.21 cool to warm weather)

This special Speed version of the OS RP7 glowplug is plated in 24K gold. But the gold is not just for added for cosmetic 'bling' as the gold plating was chosen for its thermal characteristics in order to improve throttle response in medium and low speed ranges over a standard plug.

IN STOCK  ONE ONLY LEFT.

O.S. SPEED R21 'EURO SPEC'.This latest version of the Hugely popular OS21 motor, developed from the ultra succesfull 2102 & 2103. 

1/8th On Road Motor

5% off.

Featuring improved torque at medium to low speeds, the throttle response has also been improved.

This has been achieved through a newly designed crankshaft with different counter weight shape which has had two tungsten weights installed for improve performance.

The cooling head has also been changed to improve cooling, while the button and its o-ring has been modified to prevent dust entering this area.

• New inner crankshaft.
• New Cooling-head increased cooling.
• New combustion chamber/o-ring.

New Pipe & Manifold: 1070SC(EFRA2672)/MT03

LATEST LINER & PISTON SPECIFICATION.

IN STOCK NOW

Features:

• NEW FROM THE GROUND UP...
• New design crankcase, Performance is improved by adopting a new mould.
• New crankshaft by changing the counterweights from 4 to 5mm and optimising the weight balance, the feeling in low and mid-range power is improved.
• New 9-ports cylinder adapted to the new crankcase internal design.
• New look cooling-head changed from conventional black colour to polished silver with clear coating.
• New backplate with steel thrust plate.
• New main-needle design with double o-rings for more tuning stability.
• New shaped idle-needle for better torque in the low rpm area.

• Specifications

  Content: 3.49 cc 
  Bore: 16.08mm  
  Stroke: 17.20mm  
  HP: 2.8 ps / 2.76 hp at 33000 r.p.m.
  Practical range: 4000-45000 r.p.m.
  Weight: 340g

IN STOCK NOW.

The BRAND NEW EUROSPEC II Motor from OS Engines.

(Price does NOT INCLUDE Pipe & Manifold.)

• NEW CRANKSHAFT. Featuring an extra Tungsten counter balance weigh to improve mid range performance and 'return to idle' function. 
• NEW LINER & PISTON. 7 ports (similar to Shimo II) for a smoother power delivery with increased torque. Exhaust side extra liner ports to improve piston cooling and a better heat distribution.
• New Head Graphics.

OS12 WRIST PIN.

Genuine OS Parts

OS23730020

OS21 FRONT BEARING

 R2101/2/3 & MAXIMA R6

• VSR01
• VSR02
• VSPTO01
• VSM01
• OS R2101
• OS R2102
• OS R2103
• OS R21 EURO
• OS 21XZ-R
  OS 21XZ-GT

Length: .53" (13.5mm)
Diameter: .16" (4mm)

'O' Rings for Mixture Control Valve (x2)

OS 21 CARBURETTOR COMPLETE

ALL OS 1/8th ON ROAD MOTORS

Genuine 'OS' R2103 Liner/Piston & Rod set.

Displacement: 3.49 cc
Bore: 16.08 mm
Stroke: 17.2 mm

Includes small price increase due to shipping and handling costs

OS2104 Liner, Piston and ConRod Assembly.

Displacement: 3.49 cc
Bore: 16.08 mm
Stroke: 17.2 mm

New Counterweights (4mm to 5mm) for better Crank/Rod/Piston Balance

NEW OS2105 Liner, Piston and ConRod Assembly.

Displacement: 3.49 cc
Bore: 16.08 mm
Stroke: 17.2 mm

• OS 2105 CARBURETTOR COMPLETE

• New Main Needle Design with Double O-Rings for better tuning stability

• New shaped Idle Needle for better torque in the low rpm area.

OS SPEED R21 'EURO SPEC' 2'
LINER/PISTON/ROD ASSEMBLY 

Displacement: 3.49 cc
Bore: 16.08 mm
Stroke: 17.2 mm

O.S.SPEED CARBURETTOR REPAIR KIT 21

SIMILAR TO BASIC O RING SET BUT INCLUDES FITTING GUIDES.

O.S.SPEED CARBURETTOR REPAIR PARTS 21

OS Pressure Chamber set. 

Helps balance the air pressure from the exhaust to fuel tank, and also helps keep the the air flow cooler.

A MUST have on any 1/8th Nitro car.

OS Glowplug RP6 71642060

Springs manifold long(2) 72101272

NEW 'STRAIGHT' type manifold from OS Engines.

Combines Excellent Top End Speed with good Mid/Low

performance and economy.

NEW 'STRAIGHT TYPE' MANIFOLD AND FITTINGS FOR
ALL OS 1/10 ON-ROAD MOTORS.

GENUINE OS .21 TUNED PIPE

Specifically for OS2101/03/03/EURO Long Stroke Motors

          IN STOCK NOW!

The New tuned silencer TR02 EFRA2165 kit supplied with
the MR02 manifold, designed for 1/8th on-road engines.

Improved bottom end and mid range power, making for
smoother acceleration and better control.

Requires slight mixture change. Up to 1/4 turn richer.

NEW

OS .21 TUNED PIPE TR02 EFRA2165

Developed for smoother Low end and Midrange performance whilst retaining good Top End.