One of the best things about owning a Coleman mini bike is the ability to customize it by making all kinds of performance upgrades and styling modifications. The simple, rugged construction of most Coleman mini bikes invites tinkering to make the bike your own creation.
In this article, we’ll explore popular modifications for Coleman mini bikes. We’ll look at basic bolt-on mods along with more complex engine builds and chassis upgrades. For each type of modification, we’ll suggest products to consider and provide an overview of the installation process. With some mechanical skills and the right parts, you can modify your Coleman into a one-of-a-kind custom ride.
Safety Notes on Modifying
Before making any mini bike modifications, keep these safety guidelines in mind:
- Don’t exceed your mechanical skill level – consider having complex mods done professionally
- Thoroughly research any modifications to understand the required steps
- Always use quality parts and hardware designed specifically for mini bikes
- Modifications that increase power often reduce reliability
- Carefully consider how changes will impact the bike’s handling, braking, and stability
- Most modifications void any factory warranty – do so at your own risk
- Follow all laws and regulations regarding mini bike equipment requirements
- Ride responsibly within your abilities even with modifications
- Prioritize safety above all else
Modifying your Coleman mini bike can be very rewarding if done properly. We want every bike and rider to stay safe, so take your time and use good judgment with any upgrades.
Common Coleman Mini Bike Performance Modifications
Here are some of the most common mods that boost power and speed on a Coleman mini bike:
Stage 1 Performance Kit
A stage 1 bolt-on kit is the easiest way to gain noticeable power. A kit will include compatible performance parts like:
- High-flow air filter
- De-restricted air box
- Free-flowing exhaust
- Rejetted performance carburetor
- Crankshaft bearing spacer
Expect up to a 20% power gain along with better throttle response and top end speed. Just bolt on the parts following included directions. Jetting the carb correctly is critical.
Big Bore Kit
For even more substantial power gains, a big bore kit increases engine displacement by installing a larger piston and cylinder. Big bore kits are available in sizes up to 212cc for most Coleman mini bikes. This mod requires splitting the engine cases to install the new cylinder and piston, so experience is needed. With a big bore kit you can achieve over 30% more power compared to stock.
Camshaft Upgrade
Installing more radical camshaft significantly alters the engine’s powerband for more top end pull. You’ll need to install matched valve springs, adjust valve lash, and tune the carburetor accordingly. The engine may also require more frequent rebuilds with an aggressive cam. But the power trade-off can be worth it for high performance applications.
Cylinder Head Porting
Carefully reshaping and smoothing the intake and exhaust ports in the cylinder head removes restrictions. When combined with a cam upgrade and performance carb, porting optimizes airflow for max power. Best left to experienced engine builders.
Forced Induction
Turbochargers and superchargers increase engine output by packing more air into each combustion cycle. Effective but very complex requiring extensive engine modifications. Generally not recommended for basic mini bike engines.
Octane Booster
An easy 5-10% power bump comes from using a fuel additive like octane booster. Increases the fuel’s knock resistance so ignition timing can be advanced. Allows tuning the engine more aggressively.
With the right mechanical skills, these engine modifications can increase the performance potential of a Coleman mini bike tremendously. But also consider upgrades to other areas that will be stressed by added power.
Strengthening the Drivetrain
The factory drivetrain components may not hold up to big power increases without upgrades:
Clutch Kit
A high-performance clutch kit uses stiffer clutch springs and heavier duty friction plates to withstand added torque. Reduces clutch slippage on modified engines.
Chain & Sprockets
Install a heavy duty #428 or #530 chain along with hardened steel sprockets to handle more power. Stock components may fail. Getting the gearing right for the new powerband is also key.
Gearing Changes
Alter the sprocket sizes or transmission gear ratios to optimize for acceleration or higher speed. Lower numeric gearing gives better off-the-line punch. Taller gears reduce rpm at speed.
Locking Differential
A locking differential replaces the stock diff sending equal power to both rear wheels. Improves traction during hard launches and acceleration. Critical for drag racing.
When upgrading engine power output, don’t neglect the clutch, driveline, chain, sprockets, and related components.
Improving Handling and Ride Quality
Chassis, suspension, and tire upgrades transform how a Coleman mini bike handles:
Longer Suspension Travel
Install longer travel shocks front and rear along with stiffer suspension springs. Allows hitting bigger bumps and jumps at higher speeds. Great for motocross style riding.
Fork Cartridge Emulators
Threading cartridge emulators into the stock fork tubes adds compression and rebound damping adjustability. Tune the front suspension for your weight and riding style.
Steering Damper
A steering damper attached to the frame and triple tree stabilizes the front end at speed and prevents potential tank slappers caused by chassis flex.
Stabilizer Bar
Mounting a stabilizer bar between the frame downtubes limits chassis flex during hard cornering. Reduces body roll in turns.
Wide Rims & Tires
Fit wider alloy rims and low pressure knobby tires for increased traction and bump absorption when riding off-road.
Braided Brake Lines
Replacing the stock rubber brake lines with braided stainless steel lines improves pedal feel and braking power. Eliminates line expansion under hard braking.
Once engine power is increased, handling upgrades are needed to control all that newfound speed and acceleration. Focus on safety and predictability above all.
Improving Mini Bike Ergonomics and Comfort
You likely want to enjoy your faster, better handling Coleman mini bike for longer rides. Some ergo upgrades to consider:
Aftermarket Seat
Add a nicely padded and contoured performance seat for greater comfort during long rides. Look for quality materials and tuck-and-roll stitching.
Backrest
Install a removable passenger backrest for lower back support either as the only rider or with a passenger on the rear fender.
Hand Grips
Replace the basic rubber grips with heated grips for comfort on cold days or patterned grips for improved feel and control.
Handlebars
Mount wider, taller, or adjustable handlebars to tune position and leverage to your physique and riding style. Reduce fatigue.
Relocated Foot Pegs
Move the foot pegs rearward on the frame or upward for greater leg room and more comfortable ergonomics on larger bikes.
Kill Switch
Wire in a handlebar mounted ignition kill switch for easier emergency shutoff while riding. Great safety addition.
Factor in ergonomic upgrades like these for full days of riding comfort to go along with the increased performance.
Styling Your Coleman Mini Bike
Half the fun of modifying a mini bike is making it look as cool as it performs. Some easy styling mods include:
Custom Paint
A custom paint job with wild colors and designs is the ultimate personal touch. Consider painted fenders, gas tank, side covers, and number plates to match your vision.
Decals / Stickers
Apply custom decals with your number, name, or preferred designs to give your Coleman some visual pop. Pick quality vinyls that hold up.
Colored Wheels
Paint or powdercoat the stock wheels in an eye-catching color like bright red. Or upgrade to billet machined alloys for serious bling.
Billet Accessories
Add shiny billet aluminum upgrades like valve covers, gas caps, triple clamps, handlebars, etc. Dress up ordinary parts.
Lighting Kits
LED underbody glow lighting, colored headlights, and other lighting mods give a modern high-tech look and improved visibility.
Lowering Kit
Dropping ride height via shorter shocks and lowering links provides a slammed, aggressive stance.
The only limit to visually enhancing your mini bike is your creativity. A sweet custom paint job alone can transform the entire personality of your Coleman.
Useful Utility and Convenience Mods
Don’t overlook useful utility and convenience upgrades:
Luggage Rack
Install a rear luggage rack to strap gear on for camping trips or long rides. Opt for a pivoting fold-down design.
Auxiliary Lighting
Upgrade the headlight and add auxiliary LED lights for improved visibility when riding at night or in low light conditions.
Storage Box
Add a weatherproof lockable storage box to securely carry gear and valuables on board. Mount to the rear rack.
Windshield
A mini bike windshield improves comfort at speed and protects rider and passenger from debris and bugs. Opt for shatterproof polycarbonate.
Phone Mount
Install a waterproof phone mount to your handlebars for easy access to GPS navigation apps while riding. Choose one that charges your device.
Camper Top
For a mini bike with passenger seat and backrest, a simple camper top provides shelter from sun or rain.
Don’t overlook mods that expand a Coleman’s usefulness beyond recreational trail riding. Luggage, lighting, and storage upgrades enhance practicality.
Top 5 Must-Have Coleman Mini Bike Modifications
If upgrading a Coleman mini bike, start with these 5 beneficial mods:
1. Stage 1 Bolt-On Performance Kit – Easy 15-20% power gains from intake, exhaust, and carb mods.
2. LED Lighting – Quality LED headlight and signals improve visibility and style.
3. Hydraulic Disc Brakes – Disc brakes greatly enhance stopping power to balance added speed.
4. Long Travel Suspension – Extended shocks enable handling rough terrain and jumps at speed.
5. High-Flow Air Filter – Increased airflow for optimized power. Wash and re-oil filter instead of replacing.
Prioritize upgrades that improve safety like lighting and brakes before maximizing outright speed. And thoroughly research compatible parts designed specifically for your Coleman mini bike engine and chassis.
Professional Mini Bike Shops Can Help
While many mods can be performed in your home garage, consider enlisting professional help for more complex projects:
- A performance shop can handle big bore kits, cam swaps, and other involved engine builds much faster with access to advanced tools and machining equipment.
- Custom paint and graphics are best left to painters experienced with powersports finishing techniques. They can flawlessly match colors and apply decals.
- Suspension tuners can properly set up upgraded shocks matched to your weight and riding style.
- Electrical, lighting, and accessory upgrades are much easier with a full shop’s inventory of connectors, wiring, and relay kits.
Find a shop specializing in mini bikes and dirt bikes. They have the expertise and parts inventory to take the headaches out of modifications. The pros often handle mods start-to-finish in less time than DIY.
Maintaining Your Modified Coleman Mini Bike
Upgraded performance and complexity require extra maintenance diligence:
- Closely monitor engine temperature – add a gauge if overheating is suspected.
- Inspect the valve train more frequently – tighten lash on solid cams.
- Change oil and filter at shorter intervals per tuner recommendations.
- Check belt tension and clutch engagement with added torque loads.
- Clean air filters after every ride – carry spares if in dusty conditions.
- Check spoke tension and trueness more often with alloy wheels.
- Verify all chassis fasteners are tight before each ride.
Don’t let added performance outpace your maintenance regimen. Stay religious about routine service to keep your modified Coleman running safely.
Modified Coleman Mini Bike Safety Tips
Upgraded performance warrants extra riding care:
- Add safety gear – at minimum a helmet, gloves, eye protection.
- Re-learn proper braking distances required with increased power. Start slow.
- Get training if new to performance machines. Develop skills gradually.
- Tune handling and suspension professionally so the chassis is predictable.
- Engine and exhaust mods greatly increase fire risk – carry an extinguisher.
- Inform your insurance carrier of modifications in case of accidents.
- Remain alert for maintenance needs the engine may communicate through sound, feel, etc.
- Limit others test riding your mini bike without your direct supervision.
Enjoy your customized Coleman responsibly with a priority on safety for both bike and rider. Advanced power demands advanced care at all times.
Wrapping Up Coleman Mini Bike Modifications
Modifying any vehicle yourself brings great satisfaction along with expanded capabilities. The simple construction of Coleman mini bikes makes them perfect platforms for upgrades ranging from mild to wild. Bolt-on kits require minimal effort while more extensive mods like big bore kits and engine builds demand advanced skills and tools. Take your time, research thoroughly, use quality components, and don’t cut corners on safety. Your customized Coleman mini bike will deliver huge grins per dollar spent when done properly. Just be sure to match any performance mods with handling, braking, and chassis upgrades too. And most importantly, keep the rubber side down and have fun!
