Untitled Document

O.S. .10 FP-B

Bore: 1.4mm
Stroke: 12.4mm
Displacement: 1.76cc
Weight: 140g
Rpm range: 3,000
to 18,000
Claimed output: .27bhp @ 17,000
Features: ABC construction, Schnuerle porting

Dynamite 12S PD

Bore: 13.9mm
Stroke: 14mm
Displacement: 2.1cc
Weight: 197g
Rpm range:3,000 to 30,000
Claimed output: .56bhp @ 29,000
Features: ABC construction, two-piece head, Paris dish piston

O.S. .12 CVX

Bore: 14mm
Stroke: 13.7mm
Displacement: 2.2cc
Weight: 284g
Rpm range: 3,000 to 30,000
Claimed output: .56bhp @ 29,000
Features: glow plug, air filter, type 10E carburetor, recoil starter

OFNA Factory 12 Pro

Bore: 13.7mm
Stroke: 13.7mm
Displacement: 2.2cc
Weight: 180g
Rpm range: 3,000 to 30,000
Claimed output: .67hp @ 29,000
Features: barrel carburetor, ABC construction

Dynamite 12S PS

Bore: 13.9mm
Stroke: 14mm
Displacement: 2.1cc
Weight: 257g
Rpm range: 3,000 to 30,000
Claimed output: .50bhp @ 29,000
Features: ABC construction, two-piece head

Dynamite 12SPD PS

Bore: 13.9mm
Stroke: 14mm
Displacement: 2.1cc
Weight: 257g
Rpm range: 3,000 to 30,000
Claimed output: .50bhp @ 29,000
Features: ABC construction, two piece head, Paris dish piston

OFNA Force 12

Bore: 13.9mm
Stroke: 13.7mm
Displacement: 2.2cc
Weight: 210g
Rpm range: 3,000 to 29,000
Claimed output: .56hp @ 29,000
Features: barrel carburetor, ABC construction

HPI Nitro Star Pro 12R SC

Bore: 13.8mm
Stroke: 14mm
Displacement: 2.1cc
Weight: 210g
Rpm range: 3,000 to 35,000
Claimed output: 1hp @ 29,000
Features: ABC construction, slide carburetor

O.S. .12 CV

Bore: 14mm
Stroke: 13.7mm
Displacement: 2.2cc
Weight: 230g
Rpm range: 3,000 to 30,000
Claimed output: .56bhp @ 29,000
Features: glow plug, air filter, type 10E carburetor

Force 12 Pull-starter

Bore: 13.9mm
Stroke: 13.7mm
Displacement: 2.2cc
Weight: 240g
Rpm range: 3,000 to 28,000
Claimed output: .55bhp @ 29,000
Features: barrel carburetor, ABC construction, pull-starter

Thunder Tiger GP-10B(P), GP10BX(P)

Bore: 13.4mm
Stroke: 12.4mm
Displacement: 1.76cc
Rpm range: 3,000 to 18,000
Claimed output: .27bhp @ 17,000
Features: air filter

Thunder Tiger Pro 12 B, Pro12BZX, Pro-12BZX(P)

Bore: 14mm
Stroke: 13.7mm
Displacement: 2.11cc
Rpm range: 3,000 to 30,000
Claimed output: .56bhp @ 29,000
Features: air filter

Top ET12

Bore: 13.8mm
Stroke: 14mm
Displacement: 2.1cc
Weight: 210g
Rpm range: 3,000 to 35,000
Claimed output: 1hp @ 29,000
Features: slide carburetor

NovaRossi CX12

Bore: 13.8mm
Stroke: 14mm
Displacement: 2.1cc
Weight: 210g
Rpm range: 35,000
Claimed output: 1hp
Features: slide carburetor

REX ER12

Bore: 13.8mm
Stroke: 14mm
Displacement: 2.1cc
Weight: 210g
Rpm range: 35,000
Claimed output: 1hp
Features: slide carburetor

Trinity/Picco .12/.15

Bore: 13.8/14.6mm
Stroke: 14/14.8mm
Displacement: 2.1/2.47cc
Weight: 250/260g
Rpm range: 34,000 plus
Claimed output: 1.25/1.3hp
Features: slide/barrel carburetor, pull/non-pull starter

Thunder Tiger Pro 12BZ(A), PRO 12BZX(A)

Bore: 14mm
Stroke: 13.7mm
Displacement: 2.11cc
Rpm range: 3,000 to 30,000
Claimed output: .56bhp
Features: air filter

Top CT12P

Bore: 13.8mm
Stroke: 14mm
Displacement: 2.1cc
Weight: 250g
Rpm range: 34,000
Claimed output: 1hp
Features: slide carburetor, blue head, pull-starter

NovaRossi CX12P

Bore: 13.8mm
Stroke: 13.7mm
Displacement: 2.1cc
Weight: 250g
Rpm range: 34,000
Claimed output: 1hp
Features: slide carburetor, pull-starter

REX CR12P

Bore: 13.8mm
Stroke: 14mm
Displacement: 2.1cc
Weight: 250g
Rpm range: 34,000
Claimed output: 1hp
Features: slide

Thunder Tiger PRO-15B, Pro-15BX

Bore: 15.2mm
Stroke: 13.7mm
Displacement: 2.49cc
Weight: 230g
Rpm range: 3,000 to 31,000
Claimed output: 0.6hp
Features: air filter

Top CT12

Bore: 13.8mm
Stroke: 14mm
Displacement: 2.1cc
Weight: 210g
Rpm range: 35,000
Claimed output: 1hp
Features: slide carburetor, blue head

Top ET12P

Bore: 13.8mm
Stroke: 14mm
Displacement: 2.1cc
Rpm range: 34,000
Claimed output: 1hp
Features: slide carburetor, pull-starter

REX CR12

Bore: 13.8 mm
Stroke: 14mm
Displacement: 2.1cc
Rpm range: 35,000
Claimed output: 1hp
Features: slide carburetor

REX ER12P

Bore: 13.8mm
Stroke: 14mm
Displacement: 2.1cc
Rpm range: 34,000
Claimed output: 1hp
Features: slide carburetor, pull-starter

Thunder Tiger PRO 15 BZ, Pro 15 BZX

Bore: 15.2mm
Stroke: 13.7mm
Displacement: 2.49cc
Rpm range: 3,000 to 30,000
Claimed output: .47hp
Features: air filter

O.S. .15 CV

Bore: 15.2mm
Stroke: 13.7mm
Displacement: 2.49cc
Weight: 264g
Rpm range: 3,000 to 30,000
Claimed output: .68hp
Features: glow plug, air filter, type 10E carburetor

HPI Nitro Star 15SS

Bore: 15mm
Stroke: 14mm
Displacement: 2.47cc
Weight: 251g
Rpm range: 3,000 to 32,000
Claimed output: .65hp
Features: ABC construction, barrel carburetor

O.S. .15 RX

Bore: 15mm
Stroke: 14mm
Displacement: 2.5cc
Weight: 240g
Rpm range: 3,000 to 33,000
Claimed output: 1.2hp
Features: slide carb, ABC construction

NovaRossi TX15

Bore: 14.69mm
Stroke: 14mm
Displacement: 2.49cc
Weight: 250g
Rpm range: 34,500
Claimed output: 2.49hp
Features: rubber exhaust gasket, slide-type composite carburetor, designed for turbo plugs

Top Efra ET15

Bore: 14.69mm
Stroke: 14.69mm
Displacement: 2.49cc
Weight: 267g
Rpm range: 33,000
Claimed output: 1.20hp
Features: rubber exhaust gasket, slide-type composite carburetor

O.S. .15 CVX

Bore: 14.69mm
Stroke: 15.2mm
Displacement: 2.49cc
Weight: 322g
Rpm range: 3,000 to 30,000
Claimed output: .68hp
Features: glow plug, air filter, type 10E carburetor, recoil starter

Rex TR15

Bore: 14.69mm
Stroke: 14.69mm
Displacement: 2.49cc
Weight: 265g
Rpm range: 34,500
Claimed output: 1.35hp
Features: rubber exhaust gasket, slide-type composite carburetor, designed

NovaRossi CX15

Bore: 14.69mm
Stroke: 14.69mm
Displacement: 2.49cc
Weight: 256g
Rpm range: 33,000
Claimed output: 2.49hp
Features: rubber exhaust gasket, slide-type composite carburetor

Megatech SH .15/ SH .15 with pull-starter

Bore: 14.6mm
Stroke: 14.7mm
Displacement: 2.49cc
Weight: 266g/309g with pull-starter
Rpm range: 28,000
Claimed output: .95hp
Features: slide carb, pull-starter

Force 15 Pro

Bore: 14.3mm
Stroke: 13.7mm
Displacement: 2.2cc
Weight: 180g
Rpm range: 30,000
Claimed output: .78hp
Features: barrel carburetor, ABC construction

Megatech M16

Bore: 15.2mm
Stroke: 13.8mm
Displacement: 2.65cc
Weight: 183g
Rpm range: 3,000 to 29,000
Claimed output: .67hp
Features: ABC construction, available with or without pull-starter, available with or without precut crankshaft

Rex ER15

Bore: 14.69mm
Stroke: 14.69mm
Displacement: 2.49cc
Weight: 271g
Rpm range: 33,000
Claimed output: 1.20hp
Features: rubber exhaust gasket, slide-type composite carburetor

Top ET12P

Bore: 13.8mm
Stroke: 14mm
Displacement: 2.1cc
Rpm range: 34,000
Claimed output: 1hp
Features: slide carburetor, pull-starter

Top Turbo TT15

Bore: 14.69mm
Stroke: 14.69mm
Displacement: 2.49cc
Rpm range: 34,500
Claimed output: 1.35hp
Features: rubber exhaust gasket, slide-type composite carburetor

NovaRossi CX 15R

O.S. .21 RZ-V99B

Bore: 16.6mm
Stroke: 16mm
Displacement: 3.46cc
Rpm range: 3,000 to 40,000
Claimed output: 2.4hp
Features: boost chamber, glow plug, exhaust gasket, air filter

O.S. .21SE-B and .21 SE-R

Bore: 16.6mm
Stroke: 16mm
Displacement: 3.46cc
Weight: 304/290g
Rpm range: 2,500 to 31,000
Claimed output: 1.2hp/1.5hp
Features: SE-B (buggy) SE-R (on-road), side exhaust, dual ball bearing

OFNA/Force .21 P6

Bore: 16.6mm
Stroke: 16mm
Displacement: 3.46cc
Weight: 343g
Rpm range: 2,500 to 30,500
Claimed output: 2.2hp
Features: integral exhaust adapter

Megatech PT07

Bore: 16.4mm
Stroke: 16.5mm
Displacement: 3.47cc
Weight: 220g
Rpm range: 3,500 to 35,000
Claimed output: 2.3hp
Features: integral exhaust adapter, silicone gasket

Megatech .21 SH 3-Port

Bore: 16.4mm
Stroke: 16.4mm
Displacement: 3.48cc
Weight: 320g
Rpm range: 28,000
Claimed output: 1.95hp
Features: integral exhaust adapter

Thunder Tiger Pro 21BR

Bore: 16.6mm
Stroke: 16mm
Displacement: 3.46cc
Weight: 292g
Rpm range: 3,000 to 38,000
Claimed output: 2.1hp
Features: integral exhaust adapter, air filter

OPS Speed Car Competition Pro

Bore: 16.6mm
Stroke: 16mm
Displacement: 3.46cc
Weight: 280g
Rpm range: 3,000 to 29,500
Claimed output: 2hp
Features: bolt-on exhaust adapter

OFNA/Force Delta 21 P8

Bore: 16.6mm
Stroke: 16mm
Displacement: 3.46cc
Weight: 343g
Rpm range: 2,500 to 35,000
Claimed output: 2.6hp
Features: integral exhaust adapter, port for optional boost bottle

Megatech SH .21 8-port Turbo Long Stroke

Bore: 16.27mm
Stroke: 16.75mm
Displacement: 3.48cc
Weight: N/A
Rpm range: 33,000
Claimed output: 2.8hp
Features: integral exhaust adapter

Megatech SH 7-Port Standard

Bore: 16.4mm
Stroke: 16.4mm
Displacement: 3.48cc
Weight: 320g
Rpm range: 31,000
Claimed output: 2.3hp
Features: integral exhaust adapter

O.S. Max 21RG

Bore: 16.6mm
Stroke: 16mm
Displacement: 3.46cc
Weight: 325g
Rpm range: 3,000 to 35,000
Claimed output: 1.9hp
Features: bolt-on exhaust adapter, glow plug

OFNA/Force 21 P4

Bore: 16.6mm
Stroke: 16mm
Displacement: 3.46cc
Weight: 318g
Rpm range: 2,500 to 31,000
Claimed output: 1.7hp
Features: integral exhaust adapter, port for optional boost bottle

Megatech PT01

Bore: 16.4mm
Stroke: 16.5mm
Displacement: 3.47cc
Weight: 330g
Rpm range: 3,000 to 29,500
Claimed output: 2hp
Features: integral exhaust adapter, silicone gasket

Megatech SH .21 7-Port Long Stroke

Bore: 16.27mm
Stroke: 16.75mm
Displacement: 3.48cc
Rpm range: 32,000
Claimed output: 2.5hp
Features: integral exhaust adapter

Megatech .21 3-Port with Recoil

Bore: 16.4mm
Stroke: 16.4mm
Displacement: 3.48cc
Rpm range: 31,000
Claimed output: 2.3hp
Features: integral exhaust adapter

NovaRossi RX21/SS1

Bore: 16.26mm
Stroke: 16.80mm
Displacement: 3.49cc
Weight: 320g
Rpm range: 32,500
Claimed output: 2.33hp
Features: exhaust gasket

NovaRossi BX21/SBK

Bore: 16.66mm
Stroke: 16mm
Displacement: 3.48cc
Weight: 350g
Rpm range: 29,500
Claimed output: 2.25hp
Features: boost bottle

Picco P21ES Off-road

Bore: 16.4mm
Stroke: 16.5mm
Displacement: 3.48cc
Weight: 300g
Rpm range: 2,500 to 28,000
Claimed output: 2.1hp
Features: integral exhaust adapter, composite carb

Picco P21JS On-road

Bore: 16.4mm
Stroke: 16.5mm
Displacement: 3.48cc
Rpm range: 32,000
Claimed output: 2.3hp
Features: integral exhaust adapter

RB Concept Off-road

Bore: 16.42mm
Stroke: 16.42mm
Displacement: 3.49cc
Weight: 310g
Rpm range: 30,000
Claimed output: 2hp
Features: integral exhaust adapter, exhaust gasket

Top PT21

Bore: 16.26mm
Stroke: 16.80mm
Displacement: 3.49cc
Weight: 320g
Rpm range: 32,500
Claimed output: 2.33hp
Features: exhaust gasket

TOP BT21B/K

Bore: 16.6mm
Stroke: 16mm
Displacement: 3.46cc
Weight: 331g
Rpm range: 33,000
Claimed output: 3,000 to 29,500
Features: integral exhaust adapter, silicone gasket, glow plug, crank-mounted boost chamber

Rex PR 21

Bore: 16.26mm
Stroke: 16.80mm
Displacement: 3.49cc
Weight: 320g
Rpm range: 32,500
Claimed output: 2.33hp
Features: exhaust gasket

NovaRossi R-1

Bore: 16.26mm
Stroke: 16.80mm
Displacement: 3.48cc
Weight: N/A
Rpm range: 43,000 plus
Claimed output: 2.7hp plus
Features: integral exhaust adapter.

OFNA/Picco

Bore: 16.4mm
Stroke: 16.5mm
Displacement: 3.48cc
Weight: N/A
Rpm range:N/A
Claimed output: N/A
Features: integral exhaust adapter

Picco P21KS-RV

Bore: 16.4mm
Stroke: 16.5mm
Displacement: 3.48cc
Weight: N/A
Rpm range: 43,000 plus
Claimed output: 2.7hp plus
Features: integral exhaust adapter, boost chamber

Picco P21KSR

Bore: 16.4mm
Stroke: 16.5mm
Displacement: 3.48cc
Rpm range: 43,000
Claimed output: 2.7hp
Features: integral exhaust adapter

RB Concept Worlds S7

Bore: 16.42mm
Stroke: 16.42mm
Displacement: 3.49cc
Weight: 310g
Rpm Range: N/A
Claimed Output: N/A
Features: nylon carb, exhaust gasket

Top BT21/B

Bore: 16.66mm
Stroke: 16mm
Displacement: 3.49cc
Weight: 331g
Rpm range: 28,000
Claimed output: 2hp
Features: integral exhaust adapter

TOP 8/A On-road

Bore: 16.42mm
Stroke: 16.42mm
Displacement: 3.48cc
Weight: 315g
Rpm range: 3,000 to 29,500
Claimed output: 2hp
Features: integral exhaust adapter, silicone gasket, glow plug

Rex 7/S

Bore: 16.42mm
Stroke: 16.42mm
Displacement: 3.48cc
Weight: 315g
Rpm range: 28,000
Claimed output: 2hp
Features: integral exhaust adapter

NovaRossi BX21/BK

Bore: 16.6mm
Stroke: 16mm
Displacement: 3.46cc
Weight: 331g
Rpm range: 3,000 to 29,500
Claimed output: 2hp
Features: integral exhaust adapter, silicone gasket, glow plug, crank-mounted boost chamber

Picco P21 ES On-road

Bore: 16.4mm
Stroke: 16.5mm
Displacement: 3.48cc
Weight: 300g
Rpm range: 2,500 to 28,000
Claimed output: 2.1hp
Features: integral exhaust adapter, composite carb

Picco P21JS Off-road

Bore: 16.4mm
Stroke: 16.5mm
Displacement: 3.48cc
Rpm range: 28,500
Claimed output: 2.2hp
Features: integral exhaust adapter

RB Concept Sport .21

Bore: 16.42mm
Stroke: 16.42mm
Displacement: 3.49cc
Rpm range: 2,900
Claimed output: 1.95hp
Features: exhaust gasket, nylon carb, glow plug

RB Concept C3

Bore: 16.8mm
Stroke: 16.22mm
Displacement: 3.49cc
Weight: 320g
Rpm range: 32,100
Claimed output: 2.25hp
Features: nylon carb, glow plug, exhaust gasket

Top 8/A off-road

Bore: 16.42mm
Stroke: 16.42mm
Displacement: 3.48cc
Weight: 315g
Rpm range: 28,000
Claimed output: 2hp
Features: integral exhaust adapter

Rex BR21/B

Bore: 16.66mm
Stroke: 16mm
Displacement: 3.49cc
Weight: 331g
Rpm range: 28,000
Claimed output: 2hp
Features: integral exhaust adapter

Rex BR21/SBK

Bore: 16.66mm
Stroke: 16mm
Displacement: 3.48cc
Weight: 350g
Rpm range: 29,500
Claimed output: 2.25hp
Features: boost bottle

Rex BR21/BK

Bore: 16.6mm
Stroke: 16mm
Displacement: 3.46cc
Weight: 331g
Rpm range: 3,000 to 29,500
Claimed output: 2hp
Features: integral exhaust adapter, silicone gasket, glow plug, crank-mounted boost chamber

O.S. .12LD

Bore: 14mm
Stroke: 14mm
Displacement: 2.1cc
Weight: 270g
Rpm range: 3,000 to 30,000
Claimed output: .56hp
Features: exhaust header, glow plug, air filter, slide carburetor

O.S. .15LDX

Bore: 15mm
Stroke: 15mm
Displacement: 2.49cc
Weight: 336g
Rpm range: 3,000 to 30,000
Claimed output: .68hp
Features: exhaust header, glow plug, air filter, slide carburetor, recoil starter

O.S. FS-26S-C

Bore: 18.5mm
Stroke: 16.4mm
Displacement: 4.4cc
Weight: 243g
Rpm range: 2,000 to 22,000
Claimed output: .5hp
Features: 1AB carburetor, specially designed camshaft, reinforced valve springs

Rex 7/S On-road

Bore: 16.42mm
Stroke: 16.42mm
Displacement: 3.48cc
Weight: 315g
Rpm range: 3,000 to 29,500
Claimed output: 2hp
Features: 1AB carburetor, specially designed camshaft, reinforced valve springsintegral exhaust adapter, silicone gasket, glow plug

O.S. .12LDX

Bore: 14mm
Stroke: 14mm
Displacement: 2.1cc
Weight: 330g
Rpm range: 3,000 to 30,000
Claimed output: .56hp
Features: exhaust header, glow plug, air filter, slide carburetor, recoil starter

OFNA/Force Saturn 17S

Bore: 16.5mm
Stroke: 13.7mm
Displacement: 2.97cc
Weight: N/A
Rpm range: 3,000 to 33,000
Claimed output: .80hp
Features: available with recoil starter

O.S. .15LD

Bore: 15mm
Stroke: 15mm
Displacement: 2.49cc
Weight: 273g
Rpm range: 3,000 to 30,000
Claimed output: .68hp
Features: exhaust header, glow plug, air filter, slide carburetor

Rossi R21 HTS/HPS

Bore: 16.2
Displacement: 3.5cc
Weight: 337g
Rpm range: 39,000
Claimed Output: 2.6hp
Features: Seriously cool head.