Using some 19mm box to make myself one,

What gauge is generally used?

I've got access to some 16 guage, but will that be too flimsy? 10 guage is a bit tougher to get a hold of atm.

Cheers guys :)

For those metric heads amongst you, 16 gauge is roughly 1.6mm wall, and 10 guage is around 3.2mm wall.

So 10 guage will be almost double the weight of the 16 guage, but i'm curious of what people have managed to get away with in the past?

I'm Currently 12 stone but looking to be 11 stone at the most by the time the subframe is to be used in anger

I reckon that you'll manage with something lightweight and braced in a fairly skinny gauge. It might fatigue and break one day..but depends on how long you will be using it for?

You can get a lightweight one from Rick Oliver for £100 ish. Or, apparently, ZX7r ones fit too...and are alloy compared to the steely ones of the NC..

I can't really justify spending any serious cash on the bike on anything other than the rear shock/tyres.

Im a sheetie/fabbie by trade and im a confident ally welder. making one up will cost me feck all apart from a length of box,

I think i'll make a thin guage one and brace all the stress points with some 3mm plate gussets and see how it goes.
I'll let you know how i get on.

Oh and i'll probably see you on the 26th at oulton CMSMJ1, as i'll be with the other PB lads, not riding but chilling :)

If you pull this off and it fits all standard items, you looking at making any to sell?

16's willbe plenty thick enough,10's would be super over kill.
If you find it flexes then just add a couple of extra braces.

Aye, braced and gusseted would be spot on.

I reckon you'll get it right enough.

See you at Oulton..a few others from here going too

Thanks for the confirmation guys, Happy to hear it.
I'll grab a length tomorrow and start knocking the prototype up within the next week

Oh, And i'll be turning up on a ZXR750 at Oulton, The black/purple/pink one with the huge smashed in tank dent

Start of project log here: http://pbmagforum.co.uk/index.php?showtopic=25511
:)

Oh, and to avoid anyone getting upset about it not being on this forum,

Making up an alloy subframe is on my to-do list for a rainy day, just for want of a little project and the satisfaction gained from making my own (and being a tight ar$e ).

As mentioned 16 gauge will be plenty strong.

When I started drawing one up I came to the conclusion that the bracing (triangular sections) and the method of attachment to the bike's frame is more important for load bearing than the actual thickness of the box section.

Will be watching with interest!