Specifications

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Developed from the successful 30VG series
and intended to replace and update the old
21RG range. This is a ‘sports’ tuned car engine
for general off or on road use.
Its mild tune level ensures easy
operation for the first time user.
The ‘P’ style crankshaft is for 2
speed transmissions. This version
will require an external starting
system in the car. Check your car for
compatibility. This is the updated version
with the 21F carburettor.
Displacement: 3.46cc (0.211cu.in.)
Bore: 16.60mm (0.654in.)
Stroke: 16.00mm (0.630in.)
Power Output: 2.0PS@30000 rpm
Practical RPM: 3000~36000 rpm
Weight: 347g (12.24oz)
Dimensions (mm):
A 37.0
B 21.0
C 65.6
D 45.0
E 102.7
F: 44.0
G: 30.8
H: 33.5
J: 87.4
S UNF 1/4-28
L-OS13644 O.S. MAX 21VG-P ..........................................£139.99
L-OS13645 O.S. MAX 21 VG-PX ..................................... £154.99
With its excellent mid-range power, the
21VG (PX) appeals to beginners, indoor
tracks, loose, dusty outdoor layouts
where top-end speeds are less
important than easy set up.
It’s an ideal retro-fit for 1/8
scale RTR buggies, trucks,
even 1/8 scale circuit cars. The
O.S. ABL piston liner breaks in
easier and lasts longer and its
2-needle carburettor is simpler for
beginners to adjust.
Displacement: 3.46cc (0.211cu.in.)
Bore: 16.60mm (0.654in.)
Stroke: 16.00mm (0.630in.)
Power Output: 2.0PS@30000 rpm
Practical RPM: 3000~36000 rpm
Weight: 395g (13.93oz)
Dimensions (mm):
A 37.0
B 21.0
C 82.5
D 45.0
E 102.7
F: 44.0
G: ~
H: 33.5
J: 87.4
S UNF 1/4-28
L-OS13911 O.S. Speed 21VZ-B V-Spec II ..................... £399.99
If you want to win World 1/8th Rallycross
Championships you need the best engine...
and this is it! From the tough
new aluminium cylinder head
with cooling efficiency holes, to
the ceramic rear bearing and the
specially plated crankshaft with
heavy metal balance inserts,
the Speed 21 is all about ‘no
compromise’. The engine of choice
for World Champion, Atsushi Hara, and
many others!
Displacement: 3.46cc (0.211cu.in.)
Bore: 16.60mm (0.654in.)
Stroke: 16.00mm (0.630in.)
Power Output: 2.5PS@34000 rpm
Practical RPM: 3000~40000 rpm
Weight: 349g (12.32oz)
Dimensions (mm):
A 37.0
B 21.0
C 65.0
D 45.0
E 110.6
F: 44.0
G: 30.8
H: 33.8
J: 95.3
S UNF 1/4-28
L-OS12670 O.S. MAX 25AX w/E-3080 Silencer .............£124.99
Developed from the fabulous 25FX,
the new 25AX inherites the
dramatic styling of its AX siblings
and provides class leading power
and torque for both sports flying or
even pylon racing!
The new E-3080 muffler is extremely
effective and has been optimised to
prevent any unneccesary power loss.
The mounting pattern ensures that the
new 25AX will just drop in to any
model designed around the old
25FX.
Displacement: 4.07cc (0.248cu.in.)
Bore: 18.0mm (0.709in.)
Stroke: 16.0mm (0.630in.)
Power Output: 0.80PS@16000 rpm
Practical RPM: 2500~17000 rpm
Weight: 275g (9.7oz)
Dimensions (mm):
A 38.0
B 15.0
C 75.5
D 45.0
E N/A
F: 53.0
G: 30.6
H: 44.5
J: 59.2
S UNF 1/4-28