Spacers/sumo conversion.

P.addy · Red Rocket Joined: 14 Feb 2008 Karma :

Basically converting my KTM 200 to an SM type setup.

I have the bearings suitable. I now need spacers.

To work out exactly how big I need them to be, is it fine/safe to use washers (2mm thick, 17mm inner, 30mm outer diameter) to space out the front wheel to get it central, that should then give me an exact size to get milled out correct?

Would figure doing the same to the rear, just bigger washers as spindle is mucho thick.

I'd say I won't ride it with them, but I'd likely do it to test anyway... <1 mile. Obviously its likely gonna cause death/kitten slaying etc but is this the best way to go about getting it sized up?

I then have to look at moving the caliper up and out... Laughing

for all

Major Doss · Traffic Copper Joined: 09 Jan 2014 Karma :

If the wheel is solidly mounted ie, MOT standard and your brakes function, I don't see what harm you could come to. Measure all the spacer and wheel stuff you have taken off, with some rudimentary mathematics you should come up with the answers which keep the wheels centrally mounted.
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P.addy · Red Rocket Joined: 14 Feb 2008 Karma :

Wheels that are going in are wider, running bigger bearings and shit, plus a D in Maths and my failure as a human mean I cannot calculate shit Laughing

The idea for the washers is so I can sit there, count the washers, add them up (I can do 2 times table, nice and easy) and then send specs to magician with milling machine Mr. Green

Major Doss · Traffic Copper Joined: 09 Jan 2014 Karma :

That sounds cock on, then! Thumbs Up

As long as everything else is divisable by 2mm!
'Bodging it up/suck it and see' is 25% of what made this country great.
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P.addy · Red Rocket Joined: 14 Feb 2008 Karma :

I have some 2mm ones also, so I'm sure I can work something out.

I do need the rear wheel milling 3mm or so to clear the disk/caliper so it slots in properly... Sure I can find someone to do so at some point. Until then I'll run it sans disk to line it up.

Major Doss · Traffic Copper Joined: 09 Jan 2014 Karma :

G · The Voice of Reason Joined: 02 Feb 2002 Karma :

As I think I've mentioned - my Husaberg came with a cut-off spanner head instead of a spacer. Also no spindle nut, so you had to use a ratchet strap to hold it together while you did the pinch bolts up Shocked

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It let me with the appropriate correct (ish) parts, but still worked fine as I got it.

smegballs · World Chat Champion Joined: 28 Oct 2007 Karma :

I had the idea in bed last night that shaft collars (as in link) would be make pretty good wheel spacers. They could also be sleeved down if needed with other collars or seamless tube.

https://www.bearingboys.co.uk/Solid___Unsplit-2549-c

Do it with washers, measure teh stack and then get the right spacers to fit?

Major Doss · Traffic Copper Joined: 09 Jan 2014 Karma :

Original L spacer/speedo drive=x
Original Wheel bearing distance L-R=y
Original R spacer=z
x+y+z= td

x+z=d

Thus measuring new wheel (y1)

y1+\- = new d

I am potato, but you get the drift?
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