Motorcycle high displacement sprocket 01

The large displacement sprocket of a motorcycle has the following characteristics and related points:

Number of teeth selection: High displacement motorcycle engines have higher power and torque. In order to better exert power performance, the front sprocket is usually selected with 17-18 teeth, which can achieve a reasonable transmission ratio in power transmission compared to the 14-15 teeth of small displacement motorcycles. For example, large displacement models such as the Kawasaki ZX-4R have a noise cancelling version of the small fly (front sprocket) with a 14 tooth design. In some tuning that emphasizes low torque, the number of sprocket teeth will be optimized to meet the characteristics of large displacement engines

Chain specifications: Large displacement motorcycles generally use 525 or 530 chain specifications. The length of the 525 chain is 5/8 inches, and the inner width is 2.5/8 inches; The length of the 530 chain is also 5/8 inches, and the inner width is 3.0/8 inches. The larger the number, the larger the chain size and strength, which can withstand the high power and torque output of large displacement engines. Like the 530 chain, due to its good strength, it is suitable for some high-performance and high-power large displacement motorcycles. However, due to its large weight and size, the overall weight of the vehicle will increase, and the cost is relatively high. Therefore, the 525 chain is more commonly used in large displacement motorcycles now

Material and process: High displacement sprockets are usually made of high-quality alloy steel or higher strength aluminum alloys. Chain wheels made of alloy steel have good strength and performance, and can withstand long-term high load operation; Aluminum alloy sprockets have the advantage of lightweight, which can reduce the moment of inertia and improve the response speed of the engine. For example, the active sprocket of the Zongshen Saikelong RA600 is made of lightweight aluminum alloy material, and through precise and suitable tooth profile design, the effect is excellent in reducing the moment of inertia and improving the response speed. In the manufacturing process, precision processes such as precision punching and CNC machining are used to protect the dimensional accuracy and tooth profile accuracy of the sprocket, achieve good meshing with the chain, and reduce power loss and wear

Design and Performance: Large displacement sprockets will consider factors such as heat dissipation and weight reduction in their design. Some sprockets may adopt hollow or special heat dissipation structure designs, which help dissipate heat during high-speed operation and protect the performance and lifespan of the sprockets. At the same time, in order to improve power transmission efficiency, the driven sprocket (clutch end gear) will be finely processed to enhance meshing efficiency and reduce power loss. For example, the driven sprocket of the Zongshen Saikelong RA600 is directly linked to the sliding clutch, combined with the low maintenance cost advantage of belt transmission, which protects power transmission efficiency and reduces long-term user costs

Click to view the motorcycle model parameter table：

		Chain type	number of teeth
1	Alpha	420	36
2	Alpha	420	39
3	Alpha	420	41
4	Alpha	420	43
5	Alpha	420	46
6	pit bike	420	36
7	pit bike	420	39
8	pit bike	420	41
9	pit bike	420	43
10	pit bike	420	46
11	pit bike	428	36
12	pit bike	428	39
13	pit bike	428	41
14	pit bike	428	43
15	pit bike	428	46
16	CG/CB	520	36
17	CG/CB	520	39
18	CG/CB	520	41
19	CG/CB	520	43
20	CG/CB	520	46
21	CG/CB	520	49
22	CG/CB	525	39
23	CG/CB	525	41
24	CG/CB	525	43
25	CG/CB	530	39
26	CG/CB	530	41
27	CG/CB	530	43
28	dirt bike	520	36
29	dirt bike	520	39
30	dirt bike	520	41
31	dirt bike	520	43
32	dirt bike	520	46
33	dirt bike	520	49
34	dirt bike	525	41
35	dirt bike	530	41
36	139fmb	420	13
37	139fmb	420	14
38	139fmb	420	15
39	139fmb	420	16
40	139fmb	420	17
41	139fmb	428	13
42	139fmb	428	14
43	139fmb	428	15
44	139fmb	428	16
45	139fmb	428	17
46	CG/CB	428	13
47	CG/CB	428	14
48	CG/CB	428	15
49	CG/CB	428	16
50	CG/CB	428	17
51	CG/CB	428	18
52	CG/CB	428	19
53	CG/CB	520	12
54	CG/CB	520	13
55	CG/CB	520	14
56	CG/CB	520	15
57	CG/CB	520	16
58	CG/CB	520	17
59	CG/CB	520	18
60	CG/CB	520	19
61	CG/CB	520	13
62	CG/CB	525	14
63	CG/CB	525	16
64	CG/CB	525	18
65	CG/CB	530	13
66	CG/CB	530	14
67	CG/CB	530	16
68	CG/CB	530	18