Hello and welcome!
I've been meaning to post a build thread for my 1979 Honda CB 750 Limited. Picked her up two years ago for $200. She was abandoned outside of a building downtown and sat for 4 years.
A bit of history. The Honda CB750 was introduced to the North American market in 1969. Known as the first Superbike, it was the first mass-manufactured air cooled inline-four production bike and the first to offer hydraulic dual-disc front brakes. With its incredible reliability and a 120mph(190km/h) top speed, the CB750 was hailed as Honda's masterpiece. At its release, Cycle World called it "The most sophisticated production bike ever". By no means a rare bike, in fact, one of the best selling of all time. Over 500,000 were built. A testament to Honda's build quality, quite a few still run to this day.
In 1979 Honda released the new DOHC model. To celebrate the 1969 launch of Honda's best-seller, 5000 "10th Anniversary Edition" bikes were produced for the US market. Although not as popular as the SOHC bikes built from '69 to '78, the DOHC bikes have a smoother power delivery and a power bump up to 77bhp @9000rpm and 48ft-lb tq. A 5Sp Wet Clutch transfers power through the 120 Comstar rear wheel. Stock weight is a colossal 566lbs wet.
My original intention was to convert her into a very clean Cafe Racer but during the course of the build it has progressed into more of a cafe-inspired muscle bike. Much of the build is designed to focus its visuality around the very prominent air-cooled Inline 4. In the handling department, she'll receive a ton of weight reduction, a bit of frame strengthening, modern forks, swingarm, brakes, wheels and a custom rear direct-link monoshock suspension. Eventually I'd like to do race carbs, a front-mount oil cooler setup and custom 2x 2-1 GP exhaust system.
A full build write-up will be posted here as she gets nearer to completion. Don't want to spoil the suspense
I'll include a list of parts/modifications for reference (and for my own inventory). This will be updated as the thread goes along. The list includes both installed and acquired parts. Performance
-Freshly Rebuilt Motor
-K&N RC-0790 Air Filters
-K&N Vent Filters
-Honda RSC (Racing Service Center) Carb Modification (Coming next)
-1992 Honda CBR 600 F2 Coils
-Moto Guzzi V11 Sport 9-Row Oil Cooler
-Custom 16T Offset Front Sprocket/ Driven 42T 530 Sprocket Conversion
-RK XSO 530 Chain
-4-1 2.5" Mac Exhaust System (Temporary Setup)
-2" DEI Exhaust Wrap, Graphite-Black
-Shorai LFX14L5-BS12 Suspension/Handling
-2001 GSXR 600 Front Forks, Racetech Springs and Emulators
-2001 GSXR 600 Triples with 1979 CB750 Stem
-2004 GSXR 750 Front Wheel/ Rotors
-2001 GSXR 750 Stabilizer, Pro-Tek Fork Mount, Custom Frame Mount, Fork Oil Mod
-2001 GSXR 750 Front Calipers/ Master Cylinder
-2001 GSXR 750 Swingarm -[REMOVED]: 2006 Ducati SuperSport 800 Rear Shock, Heavy-duty Spring, Custom Mounting
-2004 GSXR 750 Rear Shock. OEM Mounting.
-2004 GSXR 750 180 Rear Wheel, Rotor, Custom Races and Axle
-2001 GSXR 750 Rear Caliper/ Master Cylinder/ Reservoir/ Brackets
-All Balls Racing Steering Bearings
-EBC HH Brake Pads
-K&L 90° Valve Stems
-Michelin Pilot Power 3 Tires Controls
-Trailtech Vapor Stealth Gauge/ Indicator Dashboard, Custom Housing
-Tarozzi Rearsets, Custom Mount and Brackets
-2001 GSXR 600 Brake and Clutch Perches
-CRG RC2 Levers
-Renthal Ultra-low 7/8" Superbike Bar
-7/8 Tag Metal Bar Risers, 1" Rise
-Domino Racing Push/Pull Throttle
-Biltwell Recoil Grips
-POSH Factory 7/8" Dual "Cap" Switch
-Marine Turn-Key Ignition Switch Misc
-1980 Honda CB 750F Tank
-LSL Clubman Ř6.5" Headlight
-LSL Headlight Brackets
-H4 LED Headlight Bulb
-Radiantz 8.2" LED Turn/Brake Z-Flex Array
-LED Front Signals
-Motogadget M-Unit V.2 Electric Control Unit w/ Custom Wiring Harness
-Stainless Engine Bolt Conversion
-Adjustable Anti-Vibration Longstem 4" Mirrors
-7/8" Universal Mirror Mounts
-Shinyribs DOHC Tach-Plug "Flat-Top"
-Custom Lightened Subframe Missing/ To-do
-Stainless Brake Lines, Front
-Seat Pan & Alcantara Upholstery
-Rear Brake Pads
I've never actually built anything before so it's a learn as I go process. For now I'll be outsourcing anything that's too difficult.
This is a picture from the day I picked her up. (Yes, I now know that's not the way to tow a bike)
Full engine rebuild performed by Cypress Motorbike in Delta. After four years of sitting we pretty much had to replace everything. Clubman bars installed (and now removed). It's at this point I realize a cafe-racer is not for me. Way too uncomfortable -- especially for a 500lb monster of a bike! Rode around the parking lot and realize I'm unhappy with the suspension and braking system. Also she desperately needs rear-sets.
Bike sitting in my garage (excuse the mess!). Seat, fender and hugger removed. Temporary bracket and Tarozzi rearsets installed. Time to detab and cut the rear frame.
Mostly de-tabbed bike and rear frame has been cut off. Test fitting of the new rear loop and taillight. The shin destroyer engine guards will be removed a little later but for now they are great in case the bike falls over.
The frame is feeling a bit long. To achieve the look I'm going for I think it should end exactly above the rear axle. More cutting to do!
Applied first layer of paint remover to the tank. Test fit back on the bike. Metal tank on black motor, frame and wheels?
Obligatory ass shot.
A couple more applications of paint remover and about an hour of sanding with an orbital. The frame has been cut shorter and the battery box and wiring harness are now removed. Test fit of a new Shorai LI battery.
Another shot. I'm liking the stance but still unsure about that tank. Too fat?
Front end, carbs, airbox mostly removed. Curious how the new tri-spoke wheels will look on the bike. 2001 GSXR 750 rear wheel on Michelin 2CT tires.
New front end installed. New tank from a 1981 CB750F. Had the original steering stem pressed into the modern lower triple. The entire front end comes off a 2001 GSXR 600 for ease of installation. The forks are off a totaled race bike and have Racetech springs and emulators installed. Originally I had wanted to do a USD fork setup but I think these forks match the style of the frame a bit better. Sanded a bit of the old paint off the motor. Currently deciding whether to go with a Rental Super-bike bar or clip-ons. The bike sits about 1.5-2 inches lower with the new front end so it looks like I'll need a custom exhaust setup sooner than later. In the background is a buddy's 197- KZ200 build.
New LSL headlight and mounting ears. Trail Tech Vapor Stealth gauge and indicator dashboard.
Tested my luck purchasing a set of Ebay Pazzo-style levers. They fit. Unfortunately they also pre-load my brakes. $40 in the garbage. Oh well, lesson learned. Purchased a set of CRG RC2 levers instead.
The bike is off at a machine shop getting a modern swingarm (2001 GSXR-750) and rear monoshock (2006 Ducati 800SS) installed.
That's it for now!