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

Technical Forums for Two-Stroke Nuts
It is currently Wed Oct 17, 2018 9:32 am

All times are UTC - 4 hours [ DST ]




Post new topic Reply to topic  [ 25 posts ]  Go to page 1, 2  Next
Author Message
PostPosted: Sat Aug 01, 2015 5:07 am 
Offline

Joined: Fri Jul 31, 2015 7:04 am
Posts: 6
Location: Perth, Western Australia
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!)

Image

Image

Image

Image

Image

Image

Image

Image

Image


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 viewtopic.php?f=20&t=13047 and you will get some idea of what else I do and what else floats my boat!

Best regards from Perth, Western Australia.


Top
 Profile  
Reply with quote  
PostPosted: Tue Aug 04, 2015 8:47 am 
Offline
-----
-----

Joined: Sun Sep 11, 2011 7:25 pm
Posts: 1357
Location: 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.

_________________
81 RD 250 LC Hybrid .Widened frame with Aprilia RS250 Back end & Front end, strokd RZ 421, Kennys TSA's, 31KVM26SS Carbs M-360 P-25 ALBA Ndl Pos 3, Air 1.3/4
81Rd350lc resto 2016
81 Rd250lc resto 2017
1999 ZRX 1100


Top
 Profile  
Reply with quote  
PostPosted: Tue Aug 04, 2015 9:25 am 
Offline
User avatar

Joined: Fri Nov 01, 2013 8:34 pm
Posts: 1322
Location: back in the hills
Early R6 rotors are the same rotor. For some reason they're cheaper used.

_________________
There is only one difference between a madman and me. The madman thinks he is sane. I know I am mad.
Salvador Dali


Top
 Profile  
Reply with quote  
PostPosted: Tue Aug 04, 2015 11:32 am 
Online

Joined: Tue Jun 25, 2013 2:37 pm
Posts: 243
Location: OKC & AUSTX
I'm 99% sure FZ6 rotors will fit too. They are typically cheaper than R6 rotors.

_________________
Cheers!

Pete

'12 Tuono V4R APRC, '05 R6, '88 RZ350, '82 XV920R


Top
 Profile  
Reply with quote  
PostPosted: Tue Aug 04, 2015 1:17 pm 
Offline
User avatar

Joined: Fri Nov 01, 2013 8:34 pm
Posts: 1322
Location: back in the hills
I believe you're right.

_________________
There is only one difference between a madman and me. The madman thinks he is sane. I know I am mad.
Salvador Dali


Top
 Profile  
Reply with quote  
PostPosted: Wed Aug 05, 2015 11:48 am 
Offline
User avatar

Joined: Sun Mar 23, 2008 8:08 pm
Posts: 4037
Bought these exactly one year ago from another member (KR-RZ350) for $180 usd shipped.

Image

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. :smt023


Top
 Profile  
Reply with quote  
PostPosted: Thu Aug 06, 2015 10:55 pm 
Offline
-----
-----

Joined: Sun Mar 11, 2012 12:53 am
Posts: 116
Location: Honolulu
$230 AUS = $180 US give or take a few bucks.

_________________
www.oahurealty.net


Top
 Profile  
Reply with quote  
PostPosted: Fri Aug 14, 2015 6:14 pm 
Offline

Joined: Mon Aug 20, 2012 1:37 am
Posts: 1808
Location: Calgary, Alberta
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.

_________________
'81 RD350LC hybrid project bike - in pieces currently
'82 RD350LC in '81 colours - Built by "Solo 2" OEM pipes, UNI filters
'90 RZ350F2 with 31K motor, OEM F2 pipes & airbox


Top
 Profile  
Reply with quote  
PostPosted: Fri Aug 14, 2015 9:15 pm 
Offline

Joined: Fri Jul 31, 2015 7:04 am
Posts: 6
Location: Perth, Western Australia
The original early RZ350 rotors are 267mm diameter. Early R6 and R1 rotors are 298mm diameter.
Therefore the size difference is 31mm in diameter.


Top
 Profile  
Reply with quote  
PostPosted: Sat Aug 15, 2015 5:45 am 
Offline

Joined: Tue Dec 06, 2011 7:13 am
Posts: 105
Location: West Aust
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.


Top
 Profile  
Reply with quote  
PostPosted: Thu Dec 24, 2015 2:43 am 
Offline

Joined: Fri May 20, 2005 12:52 am
Posts: 107
Location: Burlington, ON, CA
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


Top
 Profile  
Reply with quote  
PostPosted: Thu Dec 24, 2015 3:25 am 
Offline
User avatar

Joined: Sat Oct 10, 2009 4:33 am
Posts: 9692
Location: Sydney
I reckon most people would take the extra unsprung weight over the standard setup...

_________________
My Projects:
Yamaha '85 RZ350 F1 & '83 RZ & RD Athena 421 LC & XT500 Supermoto & Honda MT250... See them all on www.2smoked.com

Like Watches? You will love www.PloProf.com & www.DeskDivers.com


Top
 Profile  
Reply with quote  
PostPosted: Thu Dec 24, 2015 3:27 am 
Offline

Joined: Mon Aug 20, 2012 1:37 am
Posts: 1808
Location: Calgary, Alberta
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.

_________________
'81 RD350LC hybrid project bike - in pieces currently
'82 RD350LC in '81 colours - Built by "Solo 2" OEM pipes, UNI filters
'90 RZ350F2 with 31K motor, OEM F2 pipes & airbox


Top
 Profile  
Reply with quote  
PostPosted: Sun Apr 17, 2016 8:06 pm 
Offline
-----
-----

Joined: Sun Sep 11, 2011 7:25 pm
Posts: 1357
Location: Perth Western Australia
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.

_________________
81 RD 250 LC Hybrid .Widened frame with Aprilia RS250 Back end & Front end, strokd RZ 421, Kennys TSA's, 31KVM26SS Carbs M-360 P-25 ALBA Ndl Pos 3, Air 1.3/4
81Rd350lc resto 2016
81 Rd250lc resto 2017
1999 ZRX 1100


Top
 Profile  
Reply with quote  
PostPosted: Fri Jul 01, 2016 10:14 pm 
Offline

Joined: Tue Dec 06, 2011 7:13 am
Posts: 105
Location: West Aust
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!


Top
 Profile  
Reply with quote  
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 25 posts ]  Go to page 1, 2  Next

All times are UTC - 4 hours [ DST ]


Who is online

Users browsing this forum: No registered users and 2 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Search for:
Jump to:  
Powered by phpBB® Forum Software © phpBB Group