Honda CB900F 1981 Cafe Racer Complete Rebuild
- June 29, 2017
- Category: Honda
- Views: 525
I wondered what I liked about the original concept of this bike. The shape of the rear seat is made up of very contemporary lines. I wanted to keep these lines Eurostyle of the time that characterizes the cb900F or the cb900 Bol d’or in Europe. So I used my resources as a designer and manufacturer of racing catamaran (www.designcatamaran.com) to design and manufacture a fully carbon back shell and using 3D printing and solidwork as a design tool for the mold.
Construction of the sub-frame:
During a transformation project it is a classic to review the lines of the Honda Dohc of these years … The sub-frame lines are rather disappointing, low and non-conforming for conversion to the style of caferacer or street fighter. So the first design work was to completely take over the rear sub-frame and correct its lines and to integrate a very minimalist electric box that hosts basic electrical equipment such as m-unit motogadget module, regulator, start-up relay and battery.
The most interesting project is to integrate a carbon shell in the rear sub-frame that reflects the European style of the cb900 Bol D’Or of the time. So we used 3D printing to make the matrix of the back shell. We used SolidWork to study the shapes of the shell and produce the final files. The conventional manufacture with female mold was used. The parts is molded under carbon-epoxy vacuum.
Particularly and for reasons of ergonomics, the back shell integrates the shape of the fuel tank. The lines are continuous and fluid from the tank to the end of the hull. Unusual feature of transformed bikes using the DOHC cb.
Another challenge was the realization of the two 18 ” wheels. The front hub was machined and we consulted Buchanan for the purchase of aluminum rims and stainless steel spokes. The front hub machining is a rather simple job, however the rear hub is slightly more complex to create and we have decided to use a 1977 cb750F rear hub. This hub is virtually bolt-on on The cb900F, some adapters and here is a piece of complex that we did not have to machine. The 18 “rims and spokes come from Buchanan. The 3.5 “and 4.5” rims allow the bike to be fitted with Pirelli Angel 120/18 for the front and 160/18 for the rear.
GSX-R forks replace the original forks of the cb. Particular attention has been paid to the triple tree machined house: there are built-in ‘risers’ which improve the driving position and a receptacle for the motorcycle cluster pro motogadget.
Particular attention was paid to the design of the spot ring and brackets of the 7 “jeep spot which are also machined house.
Engine and carburation
The engines were completely disassembled … cleaned … glass blasted and repainted with high temperature paint baked.
New chains: primary chain and timing chain as well as all seals and gaskets. A wiseco kit 985cc with a complet deep work on the head completes the engine. This beautiful cylinder can count on a system of ignition high voltage with processor and optical signal … 3 ignitions per stroke … offered by cycleX. Enough firepower to light the mixture propelled by the 34mm mikunis … but when you GUNS … you better know what you do …. I was told … upset by my first ride … The SS and Blue Angel presents itself as a beast to tame …
This is a list of part :
new rim and spoke
new discs, new pads
rebuild rear caliper
fork swap GSX-R
new brake hose SS
all new cable clutch and throttle cables
8 cell battery
powder coat : frame and motor cover
new chain high perfermance
new motor seal and gasket
high temp paint motor
new timing chain-primary chain
new wiseco 985cc piston
new carb ( mikuni 34mm)
new ignition system Power acr ignition from cycle X
new ignition cable
Custom exhaust system
motoscope pro motogadget
All new wiring system
machining triple tree
machining front hub
machining head light bracket
7 inch jeep spot
new paint with high quality varnish.
carbon rear seat.
all new SS bolt
Clean title in my hand, not a rebuilt status
I can handle the paperwork for the US buyer, I will work with my broker Livingston. I can assist for the transport.
Buyer pay for shipping and broker.
will need full payment with either Bank transfer or COD in person and payment must be cleared before it loads on shipping truck. Rest assure I have good rating on eBay and your protected in the buyers protection under eBay rules.
Paypall user : you must add 3% on selling price.
The bike has been used several times, there may be have little marks …
The RPM entry of the Pro motogadget cluster is incompatible with the output of the Power Arc ignition system. As a result, the RPM indicator works at 95% of the time. You can disable the RPM display.