Product Description
15T 428 Front Drive Sprocket for CSC TT250 & SG250
Replace a worn countershaft sprocket or fine-tune your motorcycle's gearing with this Zongshen 15-tooth front drive sprocket. Sold by CSC Motorcycles as part number ZT51-112A, this sprocket fits compatible CSC TT250 and SG250 motorcycles and uses the widely used CG-style output-shaft pattern found across a broad range of Chinese motorcycle engines.
Zongshen identifies this sprocket as OEM part number 23401-I008-0008. It uses a 428 chain, 15 teeth, a coarse 6-spline countershaft, and a two-hole retaining-plate design.
Specifications
- 15-tooth front / countershaft sprocket
- 428 chain pitch
- 6-spline countershaft mounting pattern
- Approx. 20 mm spline major diameter
- Approx. 18 mm spline root diameter
- Two-hole retaining-plate design
- Approx. 34 mm retaining-hole spacing
- Zongshen OEM part number: 23401-I008-0008
- CSC part number: ZT51-112A
CSC Motorcycle Fitment
CSC TT250: Fits compatible TT250 models using the 428-chain CG-style drivetrain. Many TT250 motorcycles use a 17-tooth front sprocket; changing to this 15T sprocket provides lower overall gearing for stronger low-speed response, trail riding and hill climbing.
CSC SG250: Fits compatible SG250 applications using this countershaft pattern. SG250 gearing changed during production, so compare your existing sprocket and chain before ordering.
CG-Style Engine Compatibility
This sprocket pattern is used across a wide range of compatible CG125, CG150, CG200 and CG250-style Chinese motorcycle engines. Published Zongshen application data associates this sprocket family with several engine codes including ZS161FMJ, ZS166FMM, ZS169FMM, ZS172FMM and ZS174MN.
Verify Before Ordering
CG-style engine names alone do not guarantee sprocket fitment. Some CG200, CG250 and similar engines use wider 520 or 530 chains.
- Verify a 428 chain
- 15-tooth front sprocket
- 6-spline countershaft
- Approx. 18 mm spline-root / 20 mm spline-major diameter
- Two-hole retaining plate
- Approx. 34 mm retaining-hole spacing
Sold individually.
