D3 COMPONENTS

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BONNIE PAGE 1

This project started l;ife with a trip to the NEC a few years back, when my friend DJ came across the Spirit of The Seventies kawasaki cafe style bike, and he said, i want to do that to a Triumph...
after that we just waited till the right parts came along, all the while he was planning what bits he wanted on, and a general idea of the look, Eventually a 1976 bonnie' oil in frame' got donated via a friend and Triumph and classic nut Roy
then DJ searched for an engine, and eventually found a decent 750cc bonnie engine from the states...and so begins the build ; )

DJ wanted a simple clean look and preferably upside down forks and alloy wheels, with decent brakes front and back.
now being 1976 bikes weren't built like today and the equivalent wheels with a reasonable tyres came from the modern 125's and after a trip to Fowlers in Bristol, we opted for the YZF125r wheels and brakes.
We opted for Ducati M600 forks which are non adjustable, but simple and decent forks compared to the old skool bonnie items and 50/54 outers same as most modern GSXRs. but the Ducati items have small brake mounts and ideally suited to this build.
The next step was to design some yokes to mate the forks to the frame, the Bonnie's were odd in that unlike most modern bikes that use 30/35mm head bearings they used 19mm, so rthat meant fitting std GSXR yokes etc became more complicated as we wanted the bearing seated over the bearing face of the yoke and not the shaft.
A suitable design was made and machined by myself with internal clamp slots as per most old skool designs, we had to run a slim 175mm centres with a fairly conservative 34mm offset, we will measure fork rake on the bike and work the rear from there.

the plan for the rear is to keep the std twin shock for that old skool look, the swingarm we are using is also original, with the YZF125 rear wheel installed, we are looking to mod the swingarm and extend it to fit the rear wheel assy, by means of some custom milled chain blocks welded in to the swingam and use the std 15mm rear spindle, also we need to mount the disc brake carrier via a torque arm or carrier stop, once on the bench we can set the swingarm angle and get some frame geometry measurements.

We are aiming for a rolling bike for the NEC in Nov '14

take a look at the bits we started with on the next page..