Six Hundred and Sixty
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Please can you post items for sale or wanted in the correct For Sale section. Items / bikes for sale here will be removed without warning. Reasons for this are in the FAQ. Thanks
Please can you post items for sale or wanted in the correct For Sale section. Items / bikes for sale here will be removed without warning. Reasons for this are in the FAQ. Thanks
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Evilchicken0
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Re: Six Hundred and Sixty
Good question .... the Fazer crank end is longer so there's actually more material there than 3HE, I did you a little drawing 
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Alex.
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Re: Six Hundred and Sixty
A good little drawing, as I would expect from a man of your profession... 
Just a little clarification though, is that the taper from the 4JH, or from the Fazer (5DM)?
Alex.
Just a little clarification though, is that the taper from the 4JH, or from the Fazer (5DM)?
Alex.
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Evilchicken0
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Re: Six Hundred and Sixty
Sorry it's taken from the Fazer - I couldn't get the flywheel off the 4JH crank.
As far as I know the 3HE has the same timing as the 4JH so you can use the same electrics - maybe
As far as I know the 3HE has the same timing as the 4JH so you can use the same electrics - maybe
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Alex.
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Re: Six Hundred and Sixty
Uh oh, brain working overtime...
If the 3HE taper will fit within the required taper for the 4JH/5DM, would there be enough gap to make up a 'spacer'? A bit of metal turned up to be a snug fit on the 3HE taper on the inside, with the outside being the correct taper for the 4JH? There could even be a slot for the woodruff key to keep everything in line.
There would not be much metal, but it might work....
If only I knew of someone with a lathe in their garage, hold on!! That would be me!
Alex.
If the 3HE taper will fit within the required taper for the 4JH/5DM, would there be enough gap to make up a 'spacer'? A bit of metal turned up to be a snug fit on the 3HE taper on the inside, with the outside being the correct taper for the 4JH? There could even be a slot for the woodruff key to keep everything in line.
There would not be much metal, but it might work....
If only I knew of someone with a lathe in their garage, hold on!! That would be me!
Alex.
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Alex.
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Re: Six Hundred and Sixty
There are some diagrams over on FZRarchives that show the differences. While the timing my be the same, how the CDI is kept informed of the position of the crank is different.Evilchicken0 wrote:Sorry it's taken from the Fazer - I couldn't get the flywheel off the 4JH crank.
As far as I know the 3HE has the same timing as the 4JH so you can use the same electrics - maybe
Alex.
Edit:- Here's the thread with the trigger pics in post 4:-
http://www.fzrarchives.com/ipb/index.ph ... l=dadrider
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Evilchicken0
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Re: Six Hundred and Sixty
Hmmm - might be an idea to have it welded and machined back then ???
The only other way would be to make a spacer but the chances are it would slip.
The only other way would be to make a spacer but the chances are it would slip.
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Alex.
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Re: Six Hundred and Sixty
Even if there was a slot running the length of the spacer on the taper, with the OD being ever so slightly larger, so that the flywheel pushes the slot closed ensuring that the spacer grips the inner taper?
I know what I mean, just can't say it too well!
Alex.
I know what I mean, just can't say it too well!
Alex.
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Evilchicken0
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Re: Six Hundred and Sixty
Superglue you mean ... nah you'd heat the spacer and rely on an interferance fit, shirley ?
You'd need a deeper woodruff key though.
You'd need a deeper woodruff key though.
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Evilchicken0
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Re: Six Hundred and Sixty
This was a good idea when I drew it but so good now - the turning moment of the stator may shear the end of the crank
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Alex.
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Re: Six Hundred and Sixty
I like the way you are thinking!
But, turning the end of the crank would be a right nightmare! It is definately not something I could do with my little hobby lathe and just think of the out of balance forces on the lathe when spinning the crank (without rods & pistons or a bottom end to hold it steady).
Alex.
But, turning the end of the crank would be a right nightmare! It is definately not something I could do with my little hobby lathe and just think of the out of balance forces on the lathe when spinning the crank (without rods & pistons or a bottom end to hold it steady).
Alex.