RZ/RD 350 & Misc. 2-Stroke Tech BBS

A friend of mine in Albany, Western Australia very recently commissioned me to make up a set of caliper mounting brackets.

The modification has been to fit early R1 disc rotors (298mm dia) to early RZ350 wheel and forks, using Yamaha R1 'Blue Spot' or 'Gold' calipers.

The early RZ350 forks have a nominal distance of 42mm between the mounting lug holes on the back of the leg. (...I have just measured them and it is actually 42.5mm on the forks that I have!)

This pair of caliper mounting brackets will bolt directly on to the early RZ350 forks, the 'Blue Spot' or 'Gold' calipers will bolt directly onto the mounting brackets and they will correctly align with the early (larger) R1 disc rotors. There is no machining to be done, no spacers to be fitted and it is a ten minute job.

The following photos show the completed set up and views of the caliper mounting brackets. (.....please excuse the scruffy looking wheel and fork legs!)




















If there is any interest or demand for these caliper mounting brackets, I am willing to make up small batches (left and right pairs) to be available for sale. I am a qualified precision machinist and work on my own from a small workshop. I am not able to mass produce these items and there might well be some delays in meeting orders depending upon other commitments at time of order.

Prices for a pair of caliper mounting brackets would be AUD$240 (free postage in Australia) or AUD$230 (plus postage for overseas buyers).

I have not placed this post under the 'Vendors' section seeing as I am not a vendor as such.
I have placed the post in this section so that readers can see what simple modifications are possible to vastly improve the RZ350 brakes and to see what is available.

See my other post http://www.rzrd500.com/phpBB3/viewtopic ... 20&t=13047" onclick="window.open(this.href);return false; and you will get some idea of what else I do and what else floats my boat!

Best regards from Perth, Western Australia.

Great to see you have posted these up Neseng

Gents, I can vouch for Neseng he works very closely with the best restorer iv seen.
To add I was completely unaware that the old R1 rotors fitted the RZ wheels until I saw the aforeposted wheels in the flesh.
The restorer I might add has built some of the nicest bikes ive seen, including but not limited to a couple of LC's, and an RZ.

If your thinking of upgrading, Yamaha for Yamaha makes sense, and the blue spot are an improvement on the some times temprimental rgv twin pot conversions.

If I build another RZ I will definitely go the bluespot, R1 rotor upgrade. Again, well done Neseng.

PS Neseng, Food for thought would be to post a duplicate in the for sale section, I hate to think someone looking to buy brakes in the for sale section, misses the post and your option.

Kind regards Seahorse.

Early R6 rotors are the same rotor. For some reason they're cheaper used.

I'm 99% sure FZ6 rotors will fit too. They are typically cheaper than R6 rotors.

I believe you're right.

Bought these exactly one year ago from another member (KR-RZ350) for $180 usd shipped.



Not sure if he's still making them or not.

I think your adapters look a little better, and I always prefer to buy parts with no company logos.

$230 AUS = $180 US give or take a few bucks.

What is the size difference between the OEM RZ rotor and the R1 rotor?

I got a set of virtually identical caliper conversion plates out of the UK. The name escapes me for the moment.

The original early RZ350 rotors are 267mm diameter. Early R6 and R1 rotors are 298mm diameter.
Therefore the size difference is 31mm in diameter.

It seems a few people do the Blue Spot caliper adapters to fit std size rz rotors but nobody we knew of
made adapters to fit the r6/r1 rotor.
A really nice feature of the r6/r1 rotor is that it's floating and not rigidly mounted.

Looks very cool but I'm not so sure adding two 31 mm larger disks and two adapter brackets to unsprung weight is a good way to go.

roger

I reckon most people would take the extra unsprung weight over the standard setup...

dinamos wrote:Looks very cool but I'm not so sure adding two 31 mm larger disks and two adapter brackets to unsprung weight is a good way to go.

roger

Compared to the weight of the wheels, the extra weight of bigger calipers is minor.

I just completed this conversion on an rz I have.
It is truely a very simple conversion.
I used the existing rz venhill lines I had and the original rz master.

The difference is night and day. It's one of the simplest, and most effective improvements I have made to an rz.
Two finger braking all day long.

Norm just made another batch of calliper adapters of which I've grabbed a set for my bike.
He has one set left.
$240Aust posted to anywhere in Australia.
$230Aust plus postage Worldwide.
You won't be disappointed!