How to Buy Used Trials and Motocross Bike Parts

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tri How to Buy Used Trials and Motocross Bike Parts

Participants of motorbike trials and motocross need their bikes to function in optimal condition. Since trials and motocross courses can cause a bike to sustain a lot of wear, bike owners often need to replace parts on their bikes. In addition to repairing damaged parts, bike owners can be motivated to replace parts because they want to customise their bikes to increase their handling and performance.

To keep costs down, bike owners can consider purchasing used parts for their bikes. Used bike parts can be a safe alternative to new parts if bike owners know what to look for when inspecting a part's condition. Bike owners can find used replacement parts in local motorbike specialty shops and salvage shops, as well as online at eBay. Before shopping for used parts, however, bike owners should know how bikes for trials and motocross may differ, which is particularly necessary for buyers who would like to use parts for a trials bike on a motocross bike or vice versa. In addition to knowing the difference between bike styles, buyers should understand the critical issues to look for when purchasing trials and motocross bike bodies and frames, brakes, and engine systems.

Comparisons of Bikes for Trials and Motocross

Motorbikes that are employed to ride trials and motocross courses have a number of factors in common. Since both types of bikes travel over rough terrain, the bikes need to be sturdily made. Riders involved in trials and motocross are generally more concerned with achieving a high level of traction with their bikes than riders of cruising, sport, or touring motorbikes because trials and motocross riders drive on courses made of rough dirt instead of smooth road. Trials and motocross bikes are significantly lighter than standard road motorbikes because the bikes used in these sports must incline over obstacles like hills and boulders quickly.

Although trials and motocross bikes are similar in many ways, they differ significantly in a few key areas.

Type of Bike


Trials bikes

Have a low centre of gravity, no seat or a thin seat, small fuel tanks, and powerful throttle response

Motocross bikes

Have a higher centre of gravity, seating, bigger engines, and long-travel suspension

The differences between trials and motocross bikes stem from the dissimilar terrain that is used to construct trials and motocross courses. Riders engaged in trials courses rarely sit down on their bikes, opting instead to stand on their bike's foot pegs throughout the short duration of a course. Trials bike courses also entail that riders climb over steep rock and dirt formations, which require bikes to have a low centre of gravity and strong throttle. Motocross bikes, on the other hand, must drive up sharp inclines, often becoming airborne after passing the peak of the incline.

Bike Frame Used Parts

The frame of a trials or motocross bike refers to the body of the bike. To construct a light, yet durable, body, hollow tubes are utilised to create the basic structure of the bike. Frames can be manufactured from a variety of metallic materials, such as steel or aluminium. When purchasing a used bike frame, buyers should be wary of any signs of rust which are a strong indicator that a bike has not been properly maintained. Buyers should also look for welding around the joints of a bike's frame. Obvious welding can be a sign that the frame has been broken in the past and was repaired.


When purchasing used bike handlebars for trials and motocross bikes, buyers should look for condition issues that can point to previous damage caused by an accident. Scratched paint or metal at the ends of a pair of handlebars signifies that the handlebars have been repeatedly scraped against a course, most often during a crash. Handlebars should also be absolutely straight, or riders can have difficulty steering the bike with precision.

Foot Rests and Foot Pegs

Foot rests and foot pegs are attached to the body of a trials or motocross bike to allow riders to position their feet for traction during a ride. When purchasing used foot rests and foot pegs, buyers should look for signs of corrosion, particularly on the inside of the rests or pegs where they attach to a bike's frame. Any corrosion in the mounting area can compromise the ability of the foot rests or pegs to support a rider's body weight when the rider lifts off of the seat of the bike.

Used Brakes for Trials and Motocross Bikes

Trials and motocross bikes typically have disc brakes to slow both their front and back wheels. When riders squeeze the hand lever to activate a bike's brakes, the lever should have some resistance. When riders release the hand lever, however, the brake callipers immediately release the pressure on the bike's wheels. If the brakes do not promptly return to their resting position, a bike's wheels experience dragging. For used brake parts to function correctly with the right amount of resistance and release, they should not show signs of long-term wear, like worn surfaces or loose grips.

Used Engine System Parts for Trials and Motocross Bikes

The engine of a trials or motocross bike is composed of a system of components that includes its cooling and electrical systems. Buyers interested in used engine parts should check each part for signs of rust or corrosion because rust and corrosion can lead to trouble once a part is installed.

Engine Parts

Used engine parts for trials and motocross bikes include: pistons, valves, crankshafts, carburetors, and cylinders. Before purchasing any used engine parts, buyers should remember to check both the interior and exterior of the part for any signs of oxidation, which is a sign of poor prior maintenance.

Cooling Systems

The cooling system components that are utilised in trials and motocross bikes include: water pumps, thermostats, radiators and fans, and air filters. Most components of a cooling system are good candidates for buying in used condition, except for air filters. Air filters should be routinely changed on a bike to ensure that the bike does not overheat. Because of this, it may not be worth a bike owner's effort to add a used air filter to a bike's cooling system when the filter needs to be replaced so quickly. For other used parts of a bike's cooling system, buyers should check for structural integrity, like the absence of cracks and bends, before buying a part.

Electrical Systems

The electrical systems of a trials or motocross bike are involved in starting an engine and powering certain parts of a bike, like a bike's lights and indicators. Because the electrical system is so varied, used electrical system components for bikes include spark plugs, switches, ignition coils, CDI units, and starters, which help to power a bike's engine and other apparatus. Like most used parts of a bike, corrosion is a serious issue for electrical systems, as is water damage. Water damage on an electrical system part can render a part useless, so buyers should carefully search for any evidence of water damage before buying a used electrical system part.

Exhaust Systems

Used exhaust system components for trials and motocross bikes include cam chains, exhaust gaskets, seals, silencers, and valves. Because it is essential that an exhaust system does not have any leaks, buyers should check used exhaust parts for excessive signs of wear before purchasing a part. Advanced rust on an exhaust pipe causes small holes to form on the pipe and should be avoided. Clogs in valves can also cause problems, so buyers should check both the inside and outside of a valve before purchase to make sure it is free of any grime.


Purchasing used parts for trials and motocross bikes provides buyers with an economical way to repair or customise their bikes. Before purchasing used bike parts, however, buyers should understand how applicability and condition issues can affect a part's performance. Trials and motocross bikes are very similar in a number of ways, so some parts utilised for one type of bike can be utilised for the other. Nevertheless, variations do exist between these types of bike models, which buyers should be aware of before trying to cross-purpose parts. Certain types of bike parts require different evaluation methods for determining a part's integrity. As a result, buyers should approach evaluating used bike parts by type. Bike frames can become damaged by accidents and show specific types of crash-related evidence. Used bike brake parts are highly susceptible to wear, engine parts are prone to corrosion, and electrical system parts are extremely vulnerable to water damage. Once buyers know exactly which condition issues to look for, they can visit eBay to purchase used trials and motocross parts in a range of types from well-known makers.

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