- Motorcycle gear
- *Apex Sports (Colorado Springs)
- Cycle Gear (Colo Spgs & Lakewood)
- Erico Motorsports (Denver)
- *Foothills Motorcycles (Lakewood)
- J&P Cycles
- Performance Motorcycle of Colorado (Englewood)
- Bags
- Chase Harper
- Eclipse
- Moto-Sport Panniers (Evergreen)
- RKA
- Wolfman (Longmont)
- Batteries
- Battery Stuff
- Odyssey (dry cell batteries)
- Yuasa
- Bodywork
- Classic Motorcycle Fiberglass
- Corbin (Bike seats)
- Evan Wilcox Hand Formed Metal
- Glass From The Past
- Ross Thompson Metal Finishing (repairs and fabrication)
- Camping
- Carburetors, Air filters
- Alternative Motorcycle Repair (Amal Re-sleeving)
- K&N
- Sudco (Mikuni)
- Uni Filter
- Catalog Sales
- Clothing, Riding Gear
- Aerostich
- British Motorcycle Gear (Belstaff)
- Big Black Boots
- Hein Gericke
- Johnson Leathers
- J&P Cycles
- Kevco-Stubbs kidney support belt (these are great!)
- Metro Racing (motorcycle logos on t-shirts, hats, etc)
- MotoGear Outlet (Arvada)
- MotorcycleCloseouts (great prices!)
- Motorcycle Leather Exchange
- New Enough Motorcycle Leathers (all kinds of clothing)
- Vanson Leathers
- Chassis, Wheels, Brakes
- American Industrial Brake & Supply (303) 412-1377 (Drum brakes – Westminster)
- Buchanan Spoke & Rim
- Forking by Frank
- Hagon shock absorbers
- Maxton (Koni-esque shock absorbers)
- NJB shock absorbers
- Progressive Suspension
- Sprocket Specialists
- Vintage Brake
- The Wheel FAQ
- *Woody’s Wheel Works (Denver)
- Works Performance
- YSS USA Racing Suspension
- Electrical
- Basic Wiring
- British Wiring
- Catmando Services
- Eastern Beaver (wiring components and kits)
- K&S Technologies, switch clusters (PeakMoto carries many of them)
- Lucas Horns
- PIAA (lighting systems)
- Polly Heaters (heated grips)
- Scitsu Racing Tachs (A subsidiary of AJS Motorcycles!)
- Sparx charging systems for classic motorcycles
- Tympanium
- Wire Plus
- Wiringproducts.com
- Engine
- Carrillo Industries (connecting rods)
- Crane Cams
- JP Engineering (Pistons)
- Megacycle Cams
- Web Cams
- Wiseco Piston
- Exhaust Systems
- Gearbox, Clutch
- Barnett Clutches (also cables)
- Nova Racing Transmissions
- Quaife America
- Ignition Systems
- Boyer-Bransden
- BT-H Magnetos
- Joe Hunt Magnetos
- Powerdynamo GMBH (Dynamo and ignition systems for classic motorcycles)
- NGK Spark Plugs
- Pazon
- Sparx
- Lubricants, Chemicals
- Maintenance
- Moto Works (Denver)
- Steve’s Motorcycle Emporium (Denver)
- Miscellaneous
- Alaska Leather (real sheepskin buttpads)
- American Bike Tailor (custom accessories)
- American Custom Sign Shop
- CRG (High-quality bar-end mirrors, levers)
- Flanders cable-making supplies
- Geller Service Co. (Residential Heating, A/C, Water Heaters) (Kris Geller)
- Loobman chain oiler
- *Pro Promotions (Events, Advertising)
- RideSafer (lights, horns, reflective, first aid, etc)
- RiderStation (US)
- Scottoiler (UK)
- Shady Products, LLC (Motorcycle covers)
- TGA (Vintage racing supplies)
- Venhill Cables
- Plating, Powder Coating, Paint, Buffing
- ACE Automotive Cleaning Equipment (sandblasting equipment)
- Ajax Plating (303) 777-8930 (Denver)
- *Blast-Tech (303) 806-9992 (Sand and other media blasting – Englewood)
- Caswell Plating
- Dun-Rite Deburring, Kevin, (303) 287-3345 (Denver)
- Front Range Polishing (719) 633-6778 (Colorado Springs)
- J&S Polishing (719) 477-9484 (Colorado Springs)
- Mile High Polishing (303) 722-8112 (Denver)
- Plating Specialties
- POR15 Rust Preventative Paint
- Powder Coating Specialties (Golden)
- R Goods (Arvada)
- Quality Plating (Yuma)
- *Taint Paint (800) 733-8374 (Colorado Springs)
- Seats
- Bitchn Stitchn Inc. (Lakewood)
- Green Mountain Upholstery (Littleton)
- Tires
- Tools and Supplies
- General
- AAA Metric Supply (Denver)
- Bolt Depot
- British Tool Company
- British Tools and Fasteners and a great section on all the weirdo thread sizes
- Earl’s Performance Products (stainless braided lines and fittings, the best)
- Eastwood (automotive restoration products)
- Frost Restorer’s Equipment (UK)
- Griot’s Garage (pretty yuppified)
- Harbor Freight Tools
- History of Whitworth
- Micro-Mark (small tool specialist)
- Penn Tool Company
- Samstag Sales (Importer of fine German-made tools, even Whitworth sizes)
- Snap-on
- Tracy Tools (Whitworth, British Cycle, etc)
- Motorcycle Specific
- CruzTOOLS
- K&L Supply (Wholesale only, you’ll have to find a dealer)
- Motion Pro
- Park Tool
- Tools & Tool Replacement FAQ (Oriented towards BMW, but still useful)
- General
- Used Parts
- Imperial Sportbikes (Denver)
- Steele’s Cycle (Englewood)
- TD Motorcycle (Denver)