The engine serial number is stamped into the side of the engine. All Honda engine serial numbers have a 4 or 5 letter prefix followed by a 7 digit number.
| Engine Model | Displacement | Bore & Stroke | Power output (max.) | Net Torque | ||
| G SERIES | ||||||
| G20 |
135 cc (8.05 cu.in.) |
– | 3.0 PS | – | ||
| G25 |
59 cc (3.6 cu.in.) |
46 x 35.6 mm (1.81 x 1.40 in.) |
2.5 HP at 6,000 rpm | – | ||
| G28 |
67 cc (4.09 cu.in.) |
49 x 35.5 mm (1.93 x 1.40 in.) |
2.8 HP at 6,000 rpm | – | ||
| G30 |
135 cc (8.05 cu.in.) |
– | 4.0 PS | – | ||
| G35 |
144 cc (8.79 cu.in.) |
64 x 45 mm (2.52 x 1.77 in.) |
3.5 HP at 4,000 rpm | 6.5 Nm at 3,000 rpm | ||
| G41 |
170 cc (10.37 cu.in.) |
66 x 50 mm (2.59 x 1.97 in.) |
4.5 PS at 4,000 rpm | – | ||
| G42 |
171 cc (10.4 cu.in.) |
66 x 50 mm (2.59 x 1.97 in.) |
4.5 HP at 4,000 rpm | 8.4 Nm at 3,600 rpm | ||
| G45 |
240 cc (16.6 cu.in.) |
72 x 59 mm (2.83 x 3.32 in.) |
6.0 PS at 4,000 rpm | – | ||
| G50 |
187 cc (11.4 cu.in.) |
69 x 50 mm (2.7 x 2.0 in.) |
5.0 HP at 4,000 rpm | 9.0 Nm at 3,600 rpm | ||
| G65 |
240 cc (14.6 cu.in.) |
72 x 59 mm (2.8 x 2.3 in.) |
6.9 HP at 4,000 rpm | 12.0 Nm at 3,600 rpm | ||
| G80 |
296 cc (18.0 cu.in.) |
80 x 59 mm (3.2 x 2.3 in.) |
8.0 HP at 4,000 rpm | 15.7 Nm at 2,500 rpm | ||
| G100 |
76 cc (4.6 cu.in.) |
46 x 46 mm (1.81 x 1.81 in.) |
2.0 HP at 4,200 rpm | 3.5 Nm at 3,000 rpm | ||
| G100 K1 |
83 cc (5.06 cu.in.) |
48 x 46 mm (1.88 x 1.81 in.) |
2.2 HP at 4,200 rpm | 3.8 Nm at 3,000 rpm | ||
| G100 K2 |
98 cc (6.0 cu.in.) |
52 x 46 mm (2.05 x 1.81 in.) |
2.5 HP at 4,200 rpm | 4.5 Nm at 3,000 rpm | ||
| G150 |
144 cc (8.8 cu.in.) |
64 x 45 mm (2.52 x 1.77 in.) |
3.8 HP at 3,600 rpm | 7.4 Nm at 3,000 rpm | ||
| G200 |
197 cc (12.0 cu.in.) |
64 x 56 mm (2.52 x 2.20 in.) |
5.5 HP at 3,600 rpm | 10.8 Nm at 2,500 rpm | ||
| G300 |
272 cc (16.1 cu.in.) |
76 x 60 mm (3.00 x 2.40 in.) |
7 HP at 3,600 rpm | 14.7 Nm at 3600 rpm | ||
| G400 |
406 cc (24.8 cu.in.) |
86 x 70 mm (3.40 x 2.80 in.) |
10 HP at 3,600 rpm | 22.5 Nm at 3600 rpm | ||
| GC SERIES | ||||||
| GC135 |
135 cc (8.2 cu.in.) |
64 x 42 mm (2.5 x 1.7 in.) |
4.0 HP at 3,600 rpm | 8.6 Nm at 2,500 rpm | ||
| GC160 |
160 cc (9.8 cu.in.) |
64 x 50 mm (2.5 x 1.97 in.) |
5.0 HP at 3,600 rpm | 10.3 Nm at 2,500 rpm | ||
| GC190 |
187 cc (11.4 cu.in.) |
69 x 50 mm (2.71 x 1.97 in.) |
6.0 HP at 3,600 rpm | 12.1 Nm at 2,500 rpm | ||
| GCV SERIES | ||||||
| GCV135 |
135 cc (8.2 cu.in.) |
64 x 42 mm (2.5 x 1.7 in.) |
4.5 HP at 3,600 rpm | 9.7 Nm at 2,500 rpm | ||
| GCV160 |
160 cc (9.8 cu.in.) |
64 x 50 mm (2.5 x 1.97 in.) |
5.5 HP at 3,600 rpm | 11.4 Nm at 2,500 rpm | ||
| GCV190 |
187 cc (11.4 cu.in.) |
69 x 50 mm (2.71 x 1.97 in.) |
5.1 HP at 3,600 rpm | 11.3 Nm at 2,500 rpm | ||
| GCV520 |
530 cc (32.3 cu.in.) |
77 x 57 mm (3.0 x 2.2 in.) |
14.0 HP at 3,600 rpm | 35.9 Nm at 2,500 rpm | ||
| GCV530 |
530 cc (32.3 cu.in.) |
77 x 57 mm (3.0 x 2.2 in.) |
16.0 HP at 3,600 rpm | 36.5 Nm at 2,500 rpm | ||
| GD SERIES | ||||||
| GD90 | – | – | 9.0 PS | – | ||
| GD100 | – | – | 10.0 PS | – | ||
| GD320 |
317 cc (19.3 cu.in.) |
76 x 70 mm (2.99 x 2.76 in.) |
7.0 HP at 3,600 rpm | 15.7 Nm at 3,600 rpm | ||
| GD321 |
317 cc (19.3 cu.in.) |
76 x 70 mm (2.99 x 2.76 in.) |
7.0 HP at 3,600 rpm | 15.7 Nm at 3,600 rpm | ||
| GD410 |
411 cc (25.2 cu.in.) |
82 x 78 mm (3.23 x 3.07 in.) |
9.0 HP at 3,600 rpm | 20.6 Nm at 3,600 rpm | ||
| GD411 |
411 cc (25.2 cu.in.) |
82 x 78 mm (3.23 x 3.07 in.) |
9.0 HP at 3,600 rpm | 20.6 Nm at 3,600 rpm | ||
| GD1100 |
1061 cc (65.0 cu.in.) |
76 x 78 mm (2.99 x 3.07 in.) |
SH1:18 HP at 2,600 rpm SH2:20 HP at 3,000 rpm SH3:22 HP at 3,600 rpm |
SH1:58.8 Nm at 2,600 rpm SH2:55.9 Nm at 2,000 rpm SH3:52 Nm at 2,200 rpm |
||
| GD1250 |
1235 cc (75.6 cu.in.) |
82 x 78 mm (3.23 x 3.07 in.) |
SH1:20 HP at 2,600 rpm SH2:22 HP at 3,000 rpm SH3:24 HP at 3,600 rpm |
SH1:64.7 Nm at 1,600 rpm SH2:61.8 Nm at 2,000 rpm SH3:55.9 Nm at 2,200 rpm |
||
| GE SERIES | ||||||
| GE35 |
34.4 cc (2.11 cu.in.) |
37 x 32 mm (1.5 x 1.3 in.) |
0.91 HP at 4,500 rpm | 1.47 Nm at 3,500 rpm | ||
| GP SERIES | ||||||
| GP160H |
163 cc (9.9 cu.in.) |
68 x 45 mm (2.68 x 1.77 in.) |
4.8 HP at 3,600 rpm | 10.3 Nm at 2,500 rpm | ||
| GP200H |
196 cc (12.0 cu.in.) |
68 x 54 mm (2.68 x 2.13 in.) |
5.5 HP at 3,600 rpm | 12.4 Nm at 2,500 rpm | ||
| GS SERIES | ||||||
| GS65 |
240 cc (14.6 cu.in.) |
72 X 59 mm (2.8 x 2.3 in) |
6.8 PS at 4,000 rpm | 12.0 Nm at 3,000 rpm | ||
| GS160 |
160 cc (9.8 cu.in.) |
64 x 50 mm (2.5 x 2.0 in.) |
5.0 HP at 3,600 rpm | 10.3 Nm at 2,500 rpm | ||
| GS190A |
187 cc (11.4 cu.in.) |
69 x 50 mm (2.7 x 2.0 in.) |
6.0 HP at 3,600 rpm | 12.1 Nm at 2,500 rpm | ||
| GS190 |
187 cc (11.4 cu.in.) |
69 x 50 mm (2.7 x 2.0 in.) |
5.2 HP at 3,600 rpm | 11.3 Nm at 2,500 rpm | ||
| GSV SERIES | ||||||
| GSV190 |
187 cc (11.4 cu.in.) |
69 x 50 mm (2.7 x 2.0 in.) |
6.5 HP at 3,600 rpm | 13.2 Nm at 2,500 rpm | ||
| GT SERIES | ||||||
| GT50 | – | – | 4.0 PS | – | ||
| GT65 | – | – | 5.0 PS | – | ||
| GV SERIES | ||||||
| GV35 |
144 cc (8.8 cu.in.) |
64 x 45 mm (2.5 x 1.8 in.) |
3.5 HP at 4,000 rpm | 6.6 Nm at 3,000 rpm | ||
| GV100 |
97 cc (5.9 cu.in.) |
52 x 46 mm (2.04 x 1.81 in.) |
2.6 HP at 4,200 rpm | 4.3 Nm at 3,000 rpm | ||
| GV150 |
144 cc (8.8 cu.in.) |
64 x 45 mm (2.5 x 1.8 in.) |
3.5 HP at 3,600 rpm | 6.9 Nm at 3,000 rpm | ||
| GV200 |
197 cc (12.0 cu.in.) |
67 x 56 mm (2.64 x 2.20 in.) |
5.0 HP at 3,600 rpm | 10.3 Nm at 3,000 rpm | ||
| GV400 |
406 cc (28.1 cu.in.) |
86 x 70 mm (3.40 x 2.80 in.) |
11.0 HP at 3,600 rpm | 24.5 Nm at 3,000 rpm | ||
| GX SERIES | ||||||
| GX22 |
22 cc (1.3 cu.in.) |
33 x 26 mm (1.3 x 1.0 in.) |
1.0 HP at 7,000 rpm | 1.09 Nm at 4,500 rpm | ||
| GX25 |
25 cc (1.5 cu.in.) |
35 x 26 mm (1.4 x 1.0 in.) |
1.08 HP at 7,000 rpm | 1.25 Nm at 5,000 rpm | ||
| GX31 |
31 cc (1.3 cu.in.) |
39 x 26 mm (1.5 x 1.0 in.) |
1.5 HP at 7,000 rpm | 1.64 Nm at 4,500 rpm | ||
| GX35 |
35.8 cc (2.18 cu.in.) |
39 x 30 mm (1.5 x 1.2 in.) |
1.6 PS at 7,000 rpm | 1.9 Nm at 5,500 rpm | ||
| GX100 |
98 cc (6.0 cu.in.) |
56 x 40 mm (2.2 x 1.6 in.) |
3.0 PS at 3,600 rpm | 5.7 Nm at 3,600 rpm | ||
| GX110 |
107 cc (6.5 cu.in.) |
57 x 42 mm (2.24 x 1.6 in.) |
3.5 PS at 4,000 rpm | 6.7 Nm at 3,600 rpm | ||
| GX120 T1 |
118 cc (7.2 cu.in.) |
60 x 42 mm (2.4 x 1.65 in.) |
4.0 HP at 4,000 rpm | 7.5 Nm at 2,500 rpm | ||
| GX120 UT2/T2 |
118 cc (7.2 cu.in.) |
60 x 42 mm (2.4 x 1.65 in.) |
3.5 HP at 3,600 rpm | 7.3 Nm at 2,500 rpm | ||
| GX140 |
144 cc (8.78 cu.in.) |
64 x 45 mm (2.5 x 1.77 in.) |
5.0 PS at 4,000 rpm | 9.8 Nm at 3,600 rpm | ||
| GX160 T1 |
163 cc (9.9 cu.in.) |
68 x 45 mm (2.68 x 1.77 in.) |
5.5 HP at 4,000 rpm | 11 Nm at 2,500 rpm | ||
| GX160 UT2/T2 |
163 cc (9.9 cu.in.) |
68 x 45 mm (2.68 x 1.77 in.) |
4.9 HP at 3,600 rpm | 10.3 Nm at 2,500 rpm | ||
| GX200 T |
196 cc (12.0 cu.in.) |
68 x 54 mm (2.68 x 2.13 in.) |
6.5 HP at 3,600 rpm | 13.2 Nm at 2,500 rpm | ||
| GX200 UT2/T2 |
196 cc (12.0 cu.in.) |
68 x 54 mm (2.68 x 2.13 in.) |
5.6 HP at 3,600 rpm | 12.4 Nm at 2,500 rpm | ||
| GX240 K1/T1/UT1 |
242 cc (14.8 cu.in.) |
73 x 58 mm (2.9 x 2.3 in.) |
8.0 HP at 3,600 rpm | 17.0 Nm at 2,500 rpm | ||
| GX240 R2/RT2/T2/U2/UT2 |
270 cc (16.5 cu.in.) |
77 x 58 mm (3.0 x 2.3 in.) |
7.9 HP at 3,600 rpm | 18.3 Nm at 2,500 rpm | ||
| GX270 K1/T1/UT1 |
270 cc (16.5 cu.in.) |
77 x 58 mm (3.0 x 2.3 in.) |
9.0 HP at 3,600 rpm | 19.5 Nm at 2,500 rpm | ||
| GX270 T2/UT2 |
270 cc (16.5 cu.in.) |
77 x 58 mm (3.0 x 2.3 in.) |
8.4 HP at 3,600 rpm | 19.1 Nm at 2,500 rpm | ||
| GX340 K1 |
337 cc (20.6 cu.in.) |
82 x 64 mm (3.2 x 2.5 in.) |
11.0 HP at 3,600 rpm | 24 Nm at 2,500 rpm | ||
| GX340 R2/RT2/T2/U2/UT2 |
389 cc (23.7 cu.in.) |
88 x 64 mm (3.5 x 2.5 in.) |
10.7 HP at 3,600 rpm | 26.4 Nm at 2,500 rpm | ||
| GX360 K1 |
359 cc (21.9 cu.in.) |
58 x 68 mm (2.3 x 2.7 in.) |
13.0 HP at 3,600 rpm | 25.7 Nm at 3,000 rpm | ||
| GX390 K1 |
389 cc (23.7 cu.in.) |
88 x 64 mm (3.5 x 2.5 in.) |
13.0 HP at 3,600 rpm | 27 Nm at 2,500 rpm | ||
| GX390 RT2/T2/UT2 |
389 cc (23.7 cu.in.) |
88 x 64 mm (3.5 x 2.5 in.) |
11.7 HP at 3,600 rpm | 26.5 Nm at 2,500 rpm | ||
| GX610 K1 |
614 cc (37.5 cu.in.) |
77 x 66 mm (3.03 x 2.6 in.) |
18 HP at 3,600 rpm | 43.1 Nm at 2,500 rpm | ||
| GX610 U1/R1 |
614 cc (37.5 cu.in.) |
77 x 66 mm (3.03 x 2.6 in.) |
16.6 HP at 3,600 rpm | 39.6 Nm at 2,500 rpm | ||
| GX620 K1 |
614 cc (37.5 cu.in.) |
77 x 66 mm (3.03 x 2.6 in.) |
20 HP at 3,600 rpm | 44.1 Nm at 2,500 rpm | ||
| GX620 U1/R1 |
614 cc (37.5 cu.in.) |
77 x 66 mm (3.03 x 2.6 in.) |
18.1 HP at 3,600 rpm | 40.6 Nm at 2,500 rpm | ||
| GX630 |
688 cc (41.97 cu.in.) |
78 x 72 mm (3.07 x 2.83 in.) |
20.8 HP at 3,600 rpm | 48.3 Nm at 2,500 rpm | ||
| GX640 |
635 cc (38.7 cu.in.) |
76 x 70 mm (3.0 x 2.8 in.) |
19.7 HP at 3,600 rpm | 46.1 Nm at 2,500 rpm | ||
| GX660 |
688 cc (41.97 cu.in.) |
78 x 72 mm (3.07 x 2.83 in.) |
21.5 HP at 3,600 rpm | 48.3 Nm at 2,500 rpm | ||
| GX670 |
670 cc (40.9 cu.in.) |
77 x 72 mm (3.03 x 2.83 in.) |
24.0 HP at 3,600 rpm | 50.8 Nm at 2,500 rpm | ||
| GX670 U/R |
670 cc (40.9 cu.in.) |
77 x 72 mm (3.03 x 2.83 in.) |
20.5 HP at 3,600 rpm | 46.0 Nm at 2,500 rpm | ||
| GX690 |
688 cc (41.97 cu.in.) |
78 x 72 mm (3.07 x 2.83 in.) |
22.1 HP at 3,600 rpm | 48.3 Nm at 2,500 rpm | ||
| GXH SERIES | ||||||
| GXH50 |
49 cc (2.99 cu.in.) |
42 x 36 mm (1.65 x 1.42 in.) |
2.4 HP at 7,000 rpm | 3.04 Nm at 4,500 rpm | ||
| GXR SERIES | ||||||
| GXR120 T/RT |
121 cc (7.4 cu.in.) |
60 x 43 mm (2.36 x 1.69 in.) |
3.6 HP at 3,600 rpm | 7.5 Nm at 2,500 rpm | ||
| GXV SERIES | ||||||
| GXV50 |
49 cc (2.99 cu.in.) |
42 x 36 mm (1.65 x 1.42 in.) |
2.5 HP at 7,000 rpm | 3.04 Nm at 2,500 rpm | ||
| GXV57 |
57 cc (3.50 cu.in.) |
45 x 36 mm (1.77 x 1.42 in.) |
2.0 HP at 4,800 rpm | 3.2 Nm at 4,500 rpm | ||
| GXV120 |
118 cc (7.2 cu.in.) |
60 x 42 mm (2.4 x 1.7 in.) |
4.0 HP at 3,600 rpm | 8.0 Nm at 2,700 rpm | ||
| GXV140 |
135 cc (8.2 cu.in.) |
68 x 45 mm (2.7 x 1.8 in.) |
5.0 HP at 3,600 rpm | 10.3 Nm at 2,700 rpm | ||
| GXV160 |
163 cc (10.0 cu.in.) |
68 x 45 mm (2.7 x 1.8 in.) |
5.5 HP at 3,600 rpm | 10.8 Nm at 2,500 rpm | ||
| GXV270 |
270 cc (16.5 cu.in.) |
77 x 58 mm (3.0 x 2.3 in.) |
8.5 HP at 3,600 rpm | 18 Nm at 2,500 rpm | ||
| GXV340 |
337 cc (20.6 cu.in.) |
82 x 64 mm (3.23 x 2.52 in.) |
11 HP at 3,600 rpm | 23 Nm at 2,500 rpm | ||
| GXV390 |
389 cc (23.7 cu.in.) |
88 x 64 mm (3.46 x 2.52 in.) |
13 HP at 3,600 rpm | 28 Nm at 2,500 rpm | ||
| GXV520 |
530 cc (32.3 cu.in.) |
77 x 57 mm (3.0 x 2.2 in.) |
14.0 HP at 3,600 rpm | 35.9 Nm at 2,500 rpm | ||
| GXV530 |
530 cc (32.3 cu.in.) |
77 x 57 mm (3.0 x 2.2 in.) |
16.0 HP at 3,600 rpm | 36.5 Nm at 2,500 rpm | ||
| GXV610 K1 |
514 cc (37.5 cu.in.) |
77 x 66 mm (3.0 x 2.6 in.) |
18.0 HP at 3,600 rpm | 43.1 Nm at 2,500 rpm | ||
| GXV620 K1 |
514 cc (37.5 cu.in.) |
77 x 66 mm (3.0 x 2.6 in.) |
20.0 HP at 3,600 rpm | 44.1 Nm at 2,500 rpm | ||
| GXV630 R |
688 cc (41.97 cu.in.) |
78 x 72 mm (3.07 x 2.83 in.) |
20.8 HP at 3,600 rpm | 48.3 Nm at 2,500 rpm | ||
| GXV660 R |
688 cc (41.97 cu.in.) |
78 x 72 mm (3.07 x 2.83 in.) |
21.5 HP at 3,600 rpm | 48.3 Nm at 2,500 rpm | ||
| GXV670 |
670 cc (40.9 cu.in.) |
77 x 72 mm (3.03 x 2.83 in.) |
22.8 HP at 3,600 rpm | 44.4 Nm at 2,500 rpm | ||
| GXV690 R |
688 cc (41.97 cu.in.) |
78 x 72 mm (3.07 x 2.83 in.) |
22.1 HP at 3,600 rpm | 48.3 Nm at 2,500 rpm | ||
| iGX SERIES | ||||||
| iGX240 |
270 cc (16.5 cu.in.) |
77 x 58 mm (3.0 x 2.3 in.) |
7.9 HP at 3,600 rpm | 18.3 Nm at 3,600 rpm | ||
| iGX270 |
270 cc (16.5 cu.in.) |
77 x 58 mm (3.0 x 2.3 in.) |
8.4 HP at 3,600 rpm | 19.1 Nm at 3,600 rpm | ||
| iGX340 |
289 cc (23.7 cu.in.) |
88 x 64 mm (3.46 x 2.52 in.) |
10.7 HP at 3,600 rpm | 26.4 Nm at 3,600 rpm | ||
| iGX390 |
289 cc (23.7 cu.in.) |
88 x 64 mm (3.46 x 2.52 in.) |
11.7 HP at 3,600 rpm | 26.5 Nm at 3,600 rpm | ||
| iGX440 |
438 cc (26.7 cu.in.) |
88 x 72.1 mm (3.46 x 2.84 in.) |
12.7 HP at 3,600 rpm | 29.8 Nm at 2,500 rpm | ||