A question for the Engineers on the site

[jellywrestler]

I don't have them Spyda.

AHHH welcome to the world of rarity, I'm looking for some handlebars for my 1924 ACE and a number plate for my 1913 King Dick. that also takes a spare tube and a drive belt, the difference is they weren't as complex as the modern stuff and can be knocked up with a bit of talent and a few night schools...
Good luck, it's 100 times easier doing that shit than ten year ago.

[HenryDorsetCase]

I don't have them Spyda. My SR has a 250 SR engine in it, and I have a spare SR250 engine with it too. I'm swapping one of the 250 engines with an SR500 engine from a geezer in Aust, but his spare SR500 engine is missing the clutch cover and water pimp cover. There was only ever 4 83 SR500's built...so parts are rarer than rocking horse shit. I'm hoping he'll be good enough to let me use his covers off the complete SR500 he has to get 'em made. He seems pretty keen to get his hands on one of my SR250 engines...so I don't see it as a problem. The budget? Well...guess I'll have to pay whatever it costs...provided that ain't REAL silly money. The bike is no good without them, as they're totally different to the productionitems.

My (sort of) brother in law is a hot rod guy and had some parts cast for one of his cars. I will find out who did it. They were door sill plates for a Model A ford: so quite thin with a logo cast into them. He had one and needed some others. Ive asked him who he used because it sounds very similar size and thickness wise to what you need.

[Crasherfromwayback]

AHHH welcome to the world of rarity, I'm looking for some handlebars for my 1924 ACE and a number plate for my 1913 King Dick. that also takes a spare tube and a drive belt, the difference is they weren't as complex as the modern stuff and can be knocked up with a bit of talent and a few night schools...
Good luck, it's 100 times easier doing that shit than ten year ago.

Hahahaha..yeah cheers! It's funny...I got hold of a guy that has a vintage works bike site, and asked him who I could talk 'bout these things. He wouldn't give me any email addys without first seeing pics of the SR. I guess they're making sure you really own one, and not just showing them pics of someone elses. Once shown the pics...that door opens. You email the contacts...same thing. Pics are swapped...that door opens! Like a Free Masons secret handshake or something! But a funny wee club. They're all really helpful guys once you get introduced to them!

And you're 100% correct. Ten years ago I'd be fucked. Now...only slightly!

[Crasherfromwayback]

My (sort of) brother in law is a hot rod guy and had some parts cast for one of his cars. I will find out who did it. They were door sill plates for a Model A ford: so quite thin with a logo cast into them. He had one and needed some others. Ive asked him who he used because it sounds very similar size and thickness wise to what you need.

Cheers. Really appreciate that.

[schrodingers cat]

It may seem an extravagance but don't discount Rapid Prototyping Tools (Scanners and 3d printing) as a way of generating a CNC program or to produce an accurate pattern.
If getting it CNC's bear in mind that it would cost too much more to get two done at the same time

[Crasherfromwayback]

It may seem an extravagance but don't discount Rapid Prototyping Tools (Scanners and 3d printing) as a way of generating a CNC program or to produce an accurate pattern.
If getting it CNC's bear in mind that it would cost too much more to get two done at the same time

Yeah I'll look at anything I can mate! Do you mean not cost too much more to do two?

[schrodingers cat]

Yeah I'll look at anything I can mate! Do you mean not cost too much more to do two?

Yes. The material cost will be the least of the job.
The cost of programming time and machine time will determine the price.
If the cover is 3D scanned it will make producing the program easier.
Since it isn't a large item getting two covers machined at the same time won't cost twice as much. (Due to half as much set up and tooling change time as getting one made and then another)

[Ocean1]

Maybe you were using shit lasers? Had a go with a lidar unit that looked pretty cool, mind you they could have used some smoothing or whatever before displaying the results...

Seen the one Weltech have? Most are like that, most usefull in a sort of painbrush mode, you just sweep the head over the surface and it'll scan the surface to whatever density you specify. Problem is the point cloud isn't rational wrt any model you might want to use. What you usually want is to set up the laser (or digitiser) to ping the surface at, say 10mm horozontal incriments. That way you only get the data you want to build workable surfaces / solids from.

[Gremlin]

Don't forget we'll need pictures of the shiny finished product. Hell, I got excited by machined up cylinders that were to act as spacers...

Guys are simple folk

[Brian d marge]

3d scan it , and rapid prototype it in aluminium. thats the route I would take

While I havent the reverse engineering software , it isnt that expensive so I assume someone will be using it then print it in aluminium and then make it look like Magn.

Stephen

Steve bagshaw , for the scanning in NZ ( I know he just got some quotes)

http://www.finelineprototyping.com/ for the printing in Al

http://www.nextengine.com/ not the scanner but the software to clean up the scans

[Crasherfromwayback]

3d scan it , and rapid prototype it in aluminium. thats the route I would take

While I havent the reverse engineering software , it isnt that expensive so I assume someone will be using it then print it in aluminium and then make it look like Magn.

Stephen

Steve bagshaw , for the scanning in NZ ( I know he just got some quotes)

http://www.finelineprototyping.com/ for the printing in Al

http://www.nextengine.com/ not the scanner but the software to clean up the scans

Awesome...cheers! Here's a pic of the beast...just collected it. Magnesium everywhere. Mmmmm.

[Brian d marge]

got lucky there , I found a download rapidform, which will give you a parametric drawing of a scanned image , its just completed downloading so Ill have a look

this was going to be my retirement job , reverse engineering unobtainium

I would be interested in your experience of the whole thing

Stephen

[Grumph]

What makes you think the clutch cover and waterpump are magnesium ?

The rear hub and brakeplate, yes, chromate plus probably paint visible...but the covers, no chromate coating visible which makes me think they're sandcast alloy. I've never heard of or seen a clear chromate...and dirt bikes in particular need corrosion protection.

[Crasherfromwayback]

What makes you think the clutch cover and waterpump are magnesium ?

The rear hub and brakeplate, yes, chromate plus probably paint visible...but the covers, no chromate coating visible which makes me think they're sandcast alloy. I've never heard of or seen a clear chromate...and dirt bikes in particular need corrosion protection.

Yeah I think the 250's are alloy...but the 5 hundy definately uses Magnesium.

[Grumph]

Yeah I think the 250's are alloy...but the 5 hundy definately uses Magnesium.

Well sandcast them in alloy and paint them chromate crappy brown....