RD350 front and rear disc hubs

[pdxjim]

Are those 350 forks swapped sides so that the caliper is on the left and behind the fork?

Yes.  Standard RD350B forks.  Swapped sides like you describe.

Sorry the pic is so big!  Will try to fix it.

I hate the way my caliper looks in front of the fork
Think I will have to try this

Yeah, caliper went behind the fork leg on the rd400 and pretty much every modern bike after that

[m in sc]

downside is you should flip the wheel, and the speedo drive, which then wont work. But, if you are running a digital speedometer good to go. (im pretty sure you cant use the wheel right way around on flippd forks but i could be wrong)

[pdxjim]

Yes, right fork leg goes to the left, moving the disc to the left side, meaning the wheel must be flipped.

You can keep the speedo drive as a spacer and either take the guts out or remove the tab washer thingy from the wheel hub.  It'll be spinning the wrong way to properly drive the speedometer.

[rodneya]

I specifically bought a speedo drive adapter for my Acewell gauge that goes into the factory speedo drive at the wheel because I did not want to use a magnet. So much for that plan

[oxford]

I specifically bought a speedo drive adapter for my Acewell gauge that goes into the factory speedo drive at the wheel because I did not want to use a magnet. So much for that plan

What does that look like?  You may be ok with the wheel flip and that setup.  The acewell should be looking for a pulse, I don't think it cares which way it is rotating to get it.

[m in sc]

the acewell should work as direction of rotation wont matter on an electric pickip

[rodneya]

This is what the acewell speedo adapter looks like.
Hope you guys are correct about the direction
My garage is a bit too cold to hang out in at the moment to check

[m in sc]

i know, it shouldn't matter its just looking for rotation, not direction specific.  try it in your drill. spin the cable one way, then the other with the gauge wired up on a test bench. should work both ways.   

[Dvsrd]

If I was fitting an electronic speedo to a non-stock RD, I would have skipped that adapter, and used a normal pickup +magnets, or an inductive pickup that senses normal steel bolts, like the 6 pcs M8 holding the brake disc. The stock speedo drive is pretty heavy, requires a bit of oil or grease from time to time, and can be replaced with an aluminum spacer with a thin aluminum washer pressed on. That is what I did on my XS650, when mounting Daytona Velona electronic speedo and tach.

[oxford]

If I was fitting an electronic speedo to a non-stock RD, I would have skipped that adapter, and used a normal pickup +magnets, or an inductive pickup that senses normal steel bolts, like the 6 pcs M8 holding the brake disc. The stock speedo drive is pretty heavy, requires a bit of oil or grease from time to time, and can be replaced with an aluminum spacer with a thin aluminum washer pressed on. That is what I did on my XS650, when mounting Daytona Velona electronic speedo and tach.

I bit the bullet and just went with a gps speedo.  I didn't even want to deal with the pickup and wires running up.

[pdxjim]

I have been running a Sigma bicycle speedo on my TDR for 10+ years since i swapped to supermoto wheels.

It cost like $20 and has been faultless.

[Jspooner]

On my TZ replica street bike I run a single disc in front. The disc is a replica of a TZ750 disc made out of an XS650 disc mounted on a magnesium TZ 750 hub. I'm using a grimeca caliper and a 13mm master from a ninja 250. It has plenty of stopping power. I also run a disc in the rear but it is not needed, way overkill. It is a modified RD disc, on a euro RD hub, diameter cut down to 220mm (IIRC) and thickness cut down to 4.5mm. Caliper is a brembo off of a Duc monster.

Finally found some pics of my brakes.