I've tried everywhere, can't find it.

What is the normal and the minimum thickness of a brake disk ?
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Poul
"If Life Gets Boring, Risk It!"
MC21SE, KISS box
MC21SP, HRC box, racing loom

Didn't they stop making the RZ350 in like 1986, and the RD was like in '79?
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james
Its not how fast you go...Its how you go fast.
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on modern bikes normal disc thickness is 4.5 new and the limit in the UK is 3.5mm before you have to replace them!!! hoppe that helps, Some of teh older bikes from late 80's had very thick discs so lasted longer!

Generally the min thickness is stamped into the disk. have a good look on the ones fitted...
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There's nothing on the old disks.

We bought new pattern ones that says normal 5mm min. 3.5mm

MOT says normal 5, min. 4.5 for the 1988 model, but don't have the 1994

Ministry of traffic says normal 4 min. 3.5

The old disks are front 4.3 with a marked groove on the out and inside.

The back disk doen't look worn, has no grooves on in- or outside, nice and flat but 4.0mm

Soo, I'm confused, but we might just have to get it MOT'ed and complain if they don't accept the 4.3mm and refer to the ministry of traffic data.

It used to be normal 5 min 4.5 on almost any bike, but it has changed I found f.ex. a Honda 600RR and it has normal 4.5 min 3.5

FYI:
The RD(europe)/RZ(US) 350YPVS, watercooled was made by Yamaha from 1983 to around 1991.

Then in 1992-95 there was a RD350R made in Brazil, using all the moulds etc. bought from Yamaha.

http://home24.inet.tele.dk/pbekkerh/RDBuyersGuide.htm

Poul
_________________
Poul
"If Life Gets Boring, Risk It!"
MC21SE, KISS box
MC21SP, HRC box, racing loom

pbekkerh wrote:FYI:
The RD(europe)/RZ(US) 350YPVS, watercooled was made by Yamaha from 1983 to around 1991.

Then in 1992-95 there was a RD350R made in Brazil, using all the moulds etc. bought from Yamaha.

http://home24.inet.tele.dk/pbekkerh/RDBuyersGuide.htm

Poul

Thanks, I didn't know that. We only got the RZ350 for a couple years in the US. I think '85-'86. They were the last of the big 2-strokes. There was a yellow/black Kenny Roberts edition. I raced one for a while I was in college for a couple years. I hated it. The last US RDs were about 1979 I think with the RD400 Daytona. My friend had one. Fast but dangerious.

What was the rated HP on the RZ350?
_________________
james
Its not how fast you go...Its how you go fast.
MC21 Rothmans
RS250
RC31
CRF250X
748R
Porsche (many)
http://members.rennlist.com/j911brick/rennlist3_002.htm