Scooterotica

Anyone had a go at this? Difficult to do? Is the whole sprocket hardened? Is it worth it and does it really have any benefits?

8th picture down, at bottom of page: http://scooterotica.org/forum/viewtopic ... 0&start=50

Providing one is careful and makes accurate measurements, can it be done just with a pedestal drill, or does it have to be done in a machine shop? And what was the weight comparison pre and post drilling?

how much weight are you going to save? Just don`t have any mars bars for breakfast

If you do want to do the drilling business it can be done on a pedestal drill provided you mount the sprocket in a deviding head.

Or can markout and drill acurately.

Use a slow drilling speed and plenty of drilling preasure with a coolent (gear steel can be like stainless and harden once it is over heated)

other options are a vertical milling machine with a deviding head or a cnc/nc vertical milling machine.

personaly I would skip the mars bars

tzr.steve wrote:how much weight are you going to save? Just don`t have any mars bars for breakfast

Its not about gross weight, its about rotating mass....you dont lighten a flywheel by 500g for no reason.

Has anybody tried one of these:
http://scootrs.com/moreinfo.cfm?Product_ID=6
They are only £16.00 form UK stock and also hardened so you can run some bearings in it. At this price they seem almost too good to be true so has anybody tried one?

does any one in the uk supply these as well?

just got one of each,only fitted them wednesday and havent finished building the rest yet.will let you know,hopefully finish sat/sunday.