Engine mount pattern and frame
Horizontal engines mount on a small number of bolt patterns. We work from the measurements between the mounting points, which is the only thing that decides whether an engine drops into a frame.
What we can help you buy on 1688
Dirt bike parts
Last updated
Pit bikes are built from a small set of interchangeable parts, and what decides compatibility is the engine mount pattern and the frame geometry rather than any brand.
These are off-road machines. Nothing here is sold as road legal, which removes the approval question and puts all the weight on fitment.
Request a quote for dirt bike parts
What we check before you pay
Wheel size, axle diameter and brake type
Front and rear wheel sizes vary within the same bike name, and axle diameter and disc versus drum are separate questions. All are measurable from your machine.
Suspension travel and mounting eyes
A rear shock is eye-to-eye length, eye diameter and spring rate. Length alone will fit and will change the geometry of the bike.
Semi-auto, manual or centrifugal clutch
Three clutch types share the same engine family and need different parts. Which one you have decides half the drivetrain catalogue.
Off-road only, and what that means
These parts carry no road approval and we do not represent them as road legal. Where you intend to register a machine, we say plainly what the part is.
Fuel system and emissions equipment
Carburettors and fuel system parts shipped into some markets face engine emissions rules regardless of the vehicle being off-road.
How an order runs
- Measure your bike and send photographs Engine mount centres, wheel and axle sizes, shock eye-to-eye. A photograph with a tape measure in frame answers most questions.
- Fitment established from measurements We match parts on your measurements rather than on model names, which are not reliable in this category.
- Specification confirmed Sizes, clutch type and spring rates agreed with the seller in writing before purchase.
- Quote and approval Goods, our service fee, inspection, consolidation and freight, itemised.
- Inspection with parts measured Sampled parts measured against your figures and photographed, including welds and mounting points.
- Consolidate and ship Frames and wheels are bulky; packing and nesting decide the freight more than the route does.