Pocket Bike -
General information

Mix ratio

mixture

1:20

 1:25

 1:30

 1:35

 1:40

 1:45

 1:50

gasoline

oil in ml

oil in ml

oil in ml

oil in ml

oil in ml

oil in ml

oil in ml

1,0 litres

50

40

33

29

25

22

20

1,5 litres

76

60

50

43

38

33

30

2,0 litres

100

80

67

57

50

44

40

2,5 litres

126

100

83

71

63

56

50

3,0 litres

150

120

100

86

75

67

60

3,5 litres

176

140

117

100

88

78

70

4,0 litres

200

160

133

114

100

89

80

4,5 litres

226

180

150

129

113

100

90

5,0 litres

250

200

167

143

125

111

100

5,5 litres

276

220

183

157

138

122

110

6,0 litres

300

240

200

171

150

133

120

6,5 litres

326

260

217

186

163

144

130

7,0 litres

350

280

233

200

175

156

140

7,5 litres

376

300

250

214

188

167

150

8,0 litres

400

320

267

229

200

178

160

8,5 litres

426

340

283

243

213

189

170

9,0 litres

450

360

300

257

225

200

180

9,5 litres

476

380

317

271

238

211

190

10,0 litres

500

400

333

286

250

222

200

 

 

How can I tell what kind of engine is in my pocketbike?
Most pocketbikes use 2-stroke engines. There are two different types of 2-stroke engines in use on pocketbikes.



Case Reed Inducted:
These engines are used on '47cc' pocketbikes. The carburetor connects to the crankcase. These engines generally have a 40mm cylinder (for an actual engine size of 40.2cc) or a 44mm cylinder (for an actual engine size of 48.7cc).
Piston Port:
These engines are used mainly on the larger '49cc' midbikes & superbikes (cateye, X1, X2, 380x, R1, X7, etc), Gas Scooter (Mach1 and Silver Scooter). Here, the carburetor connects to the cylinder.


How do I install the Rocket Key on a pocketbike engine?
Note: if you are installing a rockit key in a 47cc pocketbike, please refer to the following illustration:
(For 49cc bikes the direction of rotation is the opposite)



Correct installation of a rocket key will always be with the offset pointing in the direction of flywheel rotation.

 

What spark Plug will work on my pocketbike engine?
On the stock case 47/49cc case reed inducted engine and the piston port Engine works the same NGK BM7A. When you mount a performance Cylinder on this Engines you can mount the NGK CR7HS CMR7H and the best Spark Plug NGK CR7HIX Iridium.