Member postings for Robert Butler

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Robert Butler

Yes I have and okay diameter to fit column and securred with nitrile 'O' ring

Robert Butler

Yes I have and okay diameter to fit column and securred with nitrile 'O' ring

Robert Butler

??

Jason

Try and move without dismantling, rebuilding will be more difficult than dismantling.

Robert Butler

Dave - Silly old Duffer +1

Tony

There is of course a world of difference between manufacturing and modifying motorcycles or vehicles.

In the early 1970's i was inspired by an article in Motorcycle Mechanics? to modify a BSA Bantam to produce a trials bike. This entailed fitting C15 forks and steering yolk, the stem required shortening to accommdate the Bantam headstock. Various other "modifications" including the fitment of a George Todd cylinder head, obtaining a barrel ready ported, (why reinvent the wheel) fitting crankcase and flywheel stuffers to my own design, but no doubt from inspiration gleaned elsewhere. I toyed briefly with a Wal Phillips fuel injector and made an expansion chamber modified to accomdate a high level rather than a low level exhaust. As more knowledge was required than I possessed I have no doubt I copied the design.

I fitted alloy mudguards, fitted a home produced single seat and various bracketry to suit it is unlikely other than a rough sketch to note dimensions I would reach for the drawing board.

I am currently nearing completion of a pinfire percussion cap and pin insertion tool for an RFD friend of mine, "copied" from a proprietry Hawksley/Bartram 12 gauge device, Why reinvent the wheel? I drew a sketch and transferred the dimensions, I then on a similar sketch reflected the reduced dimensions for the 16 gauge tool I was actually making. The simple dimensioned sketches I produced facilitated ease of manufacture without the need to constantly measure and reduce scale with the attendant risk of error. I devised a form tool to create the external profile of the cartridge head and set up my tailstock turret with Rotabroach and milling cutters to machine the internal features, all with idiot proof depth stops.

I also I have also made a fixture to drill the hole for the pin in the cartridge head and a second tool to complete the machining for the cavity to accomodate the percussion cap, both produced from my imagination and dimensioned sketches. As the original cartridge heads were pressings and my alternative is machined from solid brass there was nothing to copy for this stage of manufacture.

Also on the stocks is a pedestrian lawnmower service stand, which has progressed through several redesigns sketched on paper, some of which were inspired by internet searches. My early designs have transformed into something almost fit for purpose without any wasted materials or time. Once I am happy I will start manufacture.

In truth you are "modifying or customising" a previously manufactured motorcycle and there is no harm in that, Also what you have made appears to be well executed. However what I and a number of other Forum Members took exception to is the ascertion that if member needs or produces a drawing to make something they lack imagination or skill. Further as has previously been mentioned if your posts are provocative you must expect a response in similar tone.

Robert Butler

Most of Honda's, Suzukis's and Yamaha's GP Bikes of the Classic era were produced in very small numbers and it is difficult to imagine producing a multi-cylinder two or four stroke engine in capacaties ranging from 50cc to 500cc without drawings. Respectfully suggest you check the definition of diatribe, i was merely suggesting drawings resulting from inputs from many sources are the only way to produce a finished motorcycle rather than modifying an existing design.

Robert Butler.

Perhaps Honda, Suzuki, Yamaha, Kawasaki and BMW have a few drawings to work from.The ultimate design resultulting from the input of many departments and outside contractors. Hopefully this is not as the result of using unimagenative employees. Not much will be left to the imagination of one individual, and not much will be left to chance given the vast budgetts required to produce one model of motorcycle.

Your theory makes a nonsence of what is actually required.

Robert Butler

?

Robert Butler

Try WWW.lathes machine tool archive for information and handbooks. can't help with accessories sorry.

Robert Butler

Mount an ER collet chuck directly on the lathe mandrel concentricity without the effort.

Robert Butler

Robin

Use a Gents or Dovetail saw both of which which produce fine kerfs. Most of the waste can be removed with angled cuts and a nice sharp chisel used to finish. The saws and chisel referred to are much more controllable than fretsaw or coping saw.

Robert Butler

Edited By Robert Butler on 02/08/2023 09:18:32

Edited By Robert Butler on 02/08/2023 09:22:00

Bazyl

All genuine Briggs & Stratton ignition/carburation parts come with fitting instructions. The points system has been obsolete for years. The replacement converts the old points system to electronic ignition with minimal fuss. The spare lead is for the sop start or emergency stop start. I note the cost has risen significantly since replacing the ignition for a friend a few years ago. However, much like Myford who else would be supporting 40 - 50 year old machnes or engines.

If you require fitting instructions send me a PM with your email address and I can forward a copy to you.

Robert Butler

Edited By Robert Butler on 18/07/2023 17:54:37

But nitrile gloves do grab and you may be unlucky for them not to tear.

Robert Butler

Margaret you shouldn't need to handle the warf until cleaning up. Switch off and use a brush and scoop.

Robert Butler

Hi Margaret None from a safety perspective - gloves getting caught or grabbing on tooling (chucks).

Robert Butler

None

Robert Butler

Michael can you use one of the small gas soldering torches - connections and taps may be easier to acheive.

Robert Butler

Yes there is an abundance of R8 tooling at reasonable cost.

Robert Butler

John Fletcher !

Still unopened

Robert Butler