Motorcycle Front & Rear Sprockets
Front and rear sprockets in 420, 428 and 520 chain sizes, quoted by tooth count plus the mounting dimensions that actually decide the fit. A front sprocket is located by its spline and a rear by its centre bore and stud pattern, so the same tooth count can be two different parts.
Also searched as: motorcycle sprocket set, front sprocket 428, rear sprocket 520, chain and sprocket kit
Send a drawing, a sample or an OE number and we quote this part type to it. The selection data below is what the quote is built from.
What decides the price
In order of impact420, 428 and 520 do not interchange. Tooth count sets the gearing, the chain size sets the chain, and both are on the part number.
Front: spline count and thickness. Rear: centre bore, stud circle and offset. These decide fit before the tooth count does.
Carbon steel wears predictably. Hardened and coated rear sprockets last longer and cost more, and the difference is worth it on a fleet.
Worth checking before you order
Tooth count says nothing about the stud circle. Two 42T rears for two models can share nothing but the number.
A worn chain on a new sprocket wears the new one to match. Sprockets and chain move as a set.
Selection data
Confirmed per orderQuoted to your specification
Send a drawing or a samplePart numbers for this subcategory are quoted to order. Send the size, grade and finish you need, or a drawing, and we quote against that.
Questions
Can you match a sprocket to my bike?+
With the model, year and engine code, yes. We confirm the spline or stud circle before quoting, because the tooth count alone is not enough.
Do you sell chain and sprockets together?+
Yes, quoted as a set. A new chain on worn sprockets runs out fast, so we recommend both.
Send the specification, not the product name.
Grade, size, thread standard and coating are what a quote is built from. A product name alone produces a price that changes twice before the order.