Blue spot calipers

[bendy3]

Might stick with std calipers, I've got a brembo 19x20 master cylinder fitted. I was just wondering about differant caliper options to stop the blade engined beast.
http://pbmagforum.co.uk/index.php?showtopic=40253&hl=

[Kayla850]

The caliper mounts on the inside of the mounting lugs,
IT looks like the caliper and plate are attached to the lower lug with one bolt,
So basically if you mounted a 8 or 10mm plate to the fork leg with holes drilled with the correct spacing,
And a spacer to account for the offset of the caliper top mount.

Yes, but as I've said in a few previous posts, the blue spot caliper or the fork leg needs to be machined by 2-3mm to allow for the fact that the 83mm calipers/forks have a slightly different offset to the 100mm ones, ie 83mm calipers would sit slightly too far 'out' if they were fitted to 100mm forks, and 100mm calipers sit slightly too far 'in' if fitted to 83mm forks.

Those adapter plates work but they do require that either the caliper or fork mount are machined to suit. The 100mm caliper needs to sit slightly 'out' from the disc, relative to an 83mm caliper, and no amount of hanging off a breaker bar trying to torque things straight or swearing at the bike can change that (I point any readers towards the 'How to fit the 600 into the 400' thread for evidence of people suggesting that things would be 'ok' if you wring the mounting bolts up tight enough )

Easy fix then.

Yes, it's easy to fix but I suppose I'm looking at it from a re-selling point of view. It's much more difficult to sell something that can only be used with another thing (ie once the caliper or fork leg is machined it's only good for use with the thing it has been machined to fit, to a point and welding notwithstanding).

[Kayla850]

Like this ?

Yes, I think so. I can't remember the exact amount but it's around 2mm. Enough to make fitting them not really worth it unless you're planning on keeping the bike set up like that, in which case I'd choose to machine the caliper down and use the 'cheater' brackets to keep the extra weight down.

[Evilchicken0]

Yes, I think so. I can't remember the exact amount but it's around 2mm. Enough to make fitting them not really worth it unless you're planning on keeping the bike set up like that, in which case I'd choose to machine the caliper down and use the 'cheater' brackets to keep the extra weight down.

Yes you'd need somebody with a milling machine.
Then, as you say, use a cheater bracket for the top mount only - the force pushes the caliper into the fork leg so the top of braket with need to be in contact with the fork ... or the bottom against the caliper body.

[marti]

I've got a set of blue spots already machined with adaptor plates to a fit 3tj
I may sell but if not I know a machinist that can make them

[Kayla850]

I've got a set of blue spots already machined with adaptor plates to a fit 3tj
I may sell but if not I know a machinist that can make them

So do I...

[Wraith]

http://i.ebayimg.com/t/YAMAHA-FZR-400-R ... ~60_57.JPG

[Evilchicken0]

I'll just rip into it with an angle grinder

[dobbslc]

The standard calipers are actually very good even today 20 years down the line. But getting spares for them can be hard and expensive, one of mine has the pad pin thread stripped.so I've modified it a bit maybe now I have my lathe I can do a better job with a larger diameter pin.
I have a set of blue spots but really do like to keep the bike as they use to race them.

[Evilchicken0]

The standard calipers are actually very good even today 20 years down the line. But getting spares for them can be hard and expensive, one of mine has the pad pin thread stripped.so I've modified it a bit maybe now I have my lathe I can do a better job with a larger diameter pin.
I have a set of blue spots but really do like to keep the bike as they use to race them.

Probably better off with an insert ... but really I'd change the caliper.