Welcome to the TRX250R Community

Your comprehensive resource for Honda TRX250R information, parts, maintenance, and community knowledge.

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Suppliers Directory

Trusted suppliers for TRX250R parts, accessories, and services

Engine & Performance

Pro Circuit

Exhaust systems, silencers, and performance parts

Website: procircuit.com Speciality: Exhaust & Performance

Wiseco Pistons

High-performance pistons and engine components

Website: wiseco.com Speciality: Engine Internals

Suspension & Chassis

Fox Racing Shox

Premium suspension components and rebuilds

Website: foxracingshox.com Speciality: Suspension

Alba Racing

A-arms, swingarms, and chassis components

Website: albaracing.com Speciality: Chassis & Suspension

OEM & Restoration

Rocky Mountain ATV/MC

OEM and aftermarket parts, large inventory

Website: rockymountainatv.com Speciality: General Parts

Knowledge Base

Engine Rebuilding Guide

Complete step-by-step guide to rebuilding your TRX250R engine, including torque specs and common issues.

Engine

Suspension Setup & Tuning

How to properly set up your suspension for different riding styles and track conditions.

Suspension

Carburetor Tuning Tips

Master the art of carburetor tuning for optimal performance and reliability.

Fuel System

Common Problems & Solutions

Troubleshooting guide for the most common TRX250R issues and their fixes.

Troubleshooting

Performance Modifications

Popular performance upgrades and their impact on power and reliability.

Performance

Restoration Projects

Tips and techniques for restoring vintage TRX250Rs to their former glory.

Restoration

Specifications by Year

Engine

  • Type: Single cylinder, 2-stroke
  • Displacement: 246cc
  • Bore x Stroke: 66.4 x 72mm
  • Compression Ratio: 6.6:1
  • Power Valve: ATAC (Automatic Torque Amplification Chamber)

Transmission

  • Type: 6-speed manual
  • Clutch: Wet multi-plate
  • Final Drive: Chain

Dimensions

  • Length: 70.5 in (1791mm)
  • Width: 42.7 in (1085mm)
  • Height: 42.1 in (1069mm)
  • Wheelbase: 47.6 in (1209mm)
  • Dry Weight: 348 lbs (158kg)

Maintenance Schedule

Every Ride

  • Check tire pressure
  • Inspect chain tension
  • Check throttle operation
  • Verify brake function

Every 5 Hours

  • Clean and oil air filter
  • Check spark plug condition
  • Lubricate chain
  • Check engine oil level

Every 10 Hours

  • Replace engine oil
  • Check suspension linkage
  • Inspect brake pads
  • Clean carburetor

Every 20 Hours

  • Replace spark plug
  • Service air filter thoroughly
  • Check valve clearances
  • Inspect clutch plates

TRX250R Parts Directory

Comprehensive parts reference with OEM numbers and recommended aftermarket alternatives

Engine & Transmission

Engine Internals

Part OEM Part Number Aftermarket Options Recommended Links
Piston Kit (Standard) 13101-KK7-000 Wiseco, Pro-X, Vertex Rocky Mountain ATV
Cylinder Kit 12100-KK7-000 Cylinder Works, Athena MotoSport
Top End Gasket Kit 06111-KK7-000 Cometic, Athena, Vertex PowerSportsID
Crankshaft 13000-KK7-000 Hot Rods, Wiseco Rocky Mountain ATV
Connecting Rod 13200-KK7-000 Hot Rods, Wiseco Rocky Mountain ATV

Transmission & Clutch

Part OEM Part Number Aftermarket Options Recommended Links
Clutch Plates (Set) 22201-KK7-000 EBC, Barnett, Hinson MotoSport
Clutch Springs 22401-KK7-000 Barnett, EBC Rocky Mountain ATV
Drive Chain 40530-KK7-000 DID, RK, Regina PowerSportsID
Front Sprocket 23801-KK7-000 Renthal, JT, Supersprox MotoSport
Rear Sprocket 41201-KK7-000 Renthal, JT, Supersprox Rocky Mountain ATV

Suspension & Chassis

Front Suspension

Part OEM Part Number Aftermarket Options Recommended Links
Front A-Arms (Upper) 51400-KK7-000 Alba Racing, Precision Racing Alba Racing
Front A-Arms (Lower) 51350-KK7-000 Alba Racing, Precision Racing Alba Racing
Front Shocks 51400-KK7-020 Fox Racing, Elka, Works Fox Racing Shox
Ball Joints 51220-KK7-003 All Balls Racing Rocky Mountain ATV

Rear Suspension

Part OEM Part Number Aftermarket Options Recommended Links
Swingarm 52100-KK7-000 Alba Racing, Precision Racing Alba Racing
Rear Shock 52400-KK7-020 Fox Racing, Elka, Works Fox Racing Shox
Swing Arm Bearings 91051-KK7-003 All Balls Racing MotoSport
Linkage Bearings 91052-KK7-003 All Balls Racing Rocky Mountain ATV

Electrical & Ignition

Ignition System

Part OEM Part Number Aftermarket Options Recommended Links
Spark Plug 98079-56846 NGK BR9ES, Denso Rocky Mountain ATV
CDI Box 30410-KK7-000 Rick's Motorsport, Hot Shot MotoSport
Ignition Coil 30500-KK7-000 Rick's Motorsport, Hot Shot PowerSportsID
Stator 31120-KK7-000 Rick's Motorsport, Hot Shot PowerSportsID

Lighting & Electrical

Part OEM Part Number Aftermarket Options Recommended Links
Headlight 33120-KK7-003 Acerbis, Polisport, Trail Tech MotoSport
Tail Light 33700-KK7-003 Acerbis, Polisport Rocky Mountain ATV
Kill Switch 35130-KK7-000 Motion Pro, OEM PowerSportsID

Fuel & Intake System

Carburetor & Fuel System

Part OEM Part Number Aftermarket Options Recommended Links
Carburetor (34mm) 16100-KK7-000 Keihin PWK, Mikuni TMX MotoSport
Carburetor Rebuild Kit 16010-KK7-000 All Balls Racing, K&L Rocky Mountain ATV
Air Filter 17210-KK7-000 K&N, Twin Air, No Toil PowerSportsID
Fuel Tank 17500-KK7-000 Clarke Racing, IMS MotoSport
Fuel Petcock 16950-KK7-000 Pingel, Motion Pro MotoSport

Exhaust System

Part OEM Part Number Aftermarket Options Recommended Links
Exhaust Pipe 18310-KK7-000 Pro Circuit, FMF, DG Pro Circuit
Silencer 18300-KK7-000 Pro Circuit, FMF, DG Pro Circuit
Exhaust Gasket 18291-KK7-000 Cometic, Athena Rocky Mountain ATV

Brake & Steering

Brake System

Part OEM Part Number Aftermarket Options Recommended Links
Front Brake Pads 45105-KK7-006 EBC, Galfer, SBS MotoSport
Rear Brake Pads 43120-KK7-006 EBC, Galfer, SBS Rocky Mountain ATV
Front Brake Rotor 45251-KK7-006 EBC, Galfer, Braking PowerSportsID
Rear Brake Rotor 43251-KK7-006 EBC, Galfer, Braking Rocky Mountain ATV

Steering & Controls

Part OEM Part Number Aftermarket Options Recommended Links
Handlebars 53100-KK7-000 Renthal, Pro Taper, TAG MotoSport
Tie Rod Ends 53540-KK7-003 All Balls Racing Rocky Mountain ATV
Steering Stem Bearings 91054-KK7-003 All Balls Racing PowerSportsID

Body & Frame

Plastic & Body Parts

Part OEM Part Number Aftermarket Options Recommended Links
Front Fender 61100-KK7-000 Acerbis, Polisport, Maier MotoSport
Rear Fender 80100-KK7-000 Acerbis, Polisport, Maier Rocky Mountain ATV
Side Panels 83600-KK7-000 Acerbis, Polisport, Maier PowerSportsID
Seat Cover 77200-KK7-000 Gripper, Guts Racing MotoSport

Frame & Hardware

Part OEM Part Number Aftermarket Options Recommended Links
Foot Pegs 50630-KK7-000 IMS, Pro Peg, Fastway MotoSport
Grab Bar 77510-KK7-000 Pro Armor, Tusk Rocky Mountain ATV
Nerf Bars 81100-KK7-000 DG, Pro Armor, Tusk PowerSportsID

Maintenance Items

Regular Service Parts

Part OEM Part Number Aftermarket Options Service Interval Recommended Links
Engine Oil - Maxima, Motul, Amsoil Every 10 hours MotoSport
Transmission Oil - Honda GN4, Maxima Every 20 hours Rocky Mountain ATV
Air Filter Oil - No Toil, Maxima, K&N Every 5 hours PowerSportsID
Chain Lube - Maxima, Motul, DID Every ride Rocky Mountain ATV
Coolant - Engine Ice, Maxima Every 50 hours MotoSport

Wear Items

Part OEM Part Number Aftermarket Options Typical Lifespan Recommended Links
Tires (Front) Various Dunlop, Maxxis, Holeshot 1 season Rocky Mountain ATV
Tires (Rear) Various Dunlop, Maxxis, Holeshot 1 season PowerSportsID
Wheel Bearings 91051-KK7-003 All Balls Racing 100 hours PowerSportsID
Throttle Cable 17910-KK7-000 Motion Pro, Venhill 200 hours MotoSport