guides
good to know
Where to read each size on the motorcycle, and what it means for the part you ask for.
counting teeth and links
Most sprockets have their tooth count stamped on the face, often with a T: "14T" on the front one, "42T" on…
chain sizes
The first digit of the size is the pitch, the distance between rollers, in eighths of an inch: 4 means 1/2…
what changing sprockets does
The final ratio is the rear teeth divided by the front teeth: 42 ÷ 14 =…
reading a tyre
In 90/90-18 51P, 90 is the width in millimetres, the second 90 is the sidewall height as a percentage of the…
tube or tubeless
Cast (alloy) wheels are normally sealed and run tubeless tyres without a tube. Spoked wheels let air past the…
disc or drum
A disc brake has a flat metal disc on the wheel and a caliper that squeezes it. It uses brake pads…
headlamp bulbs
H4 and HS1 bulbs both have three flat prongs; H4 is usually 60/55 W and HS1 35/35…
asking for a quote
The request lists your motorcycle, each part with its size, the quantity, whether you want an original or an…