MOTORCYCLE

Ive put the race bike back together with a new bottom *yoke* [1] and
everything now appears straight. Unfortunately no amount of
tightening the head bearings will eliminate all of the play :o(

The new bearings Ive fitted are stock Suzuki from Crescent but it
used to have tapers in there. Would I have any more joy getting a set
of tapers from BSL or whoever? Id have thought they were exactly the
same size so wouldnt solve anything but Id appreciate the thoughts
of those that have a clue, unlike me.

The outer races fitted into the headstock quite easily but a mate
reckons they should have been an *extremely* tight fit. Is he right?

[1] For the benefit of Eddie :o)=

--
Daz

Daz wrote:


He might well be - if they fitted that easily, thats probably where the
play is.

I know you said the new ones are stock Suzuki, but are they the same
size as the old bearings?

On Wed, 18 Aug 2004 08:20:42 +0100, Daz
wrote:


Hmmm. Strange. Your mate is right, the races should be an
interference fit. Have you got a set of vernier calipers? [1] Can
you measure the old and new races accurately?

Ive just had a very troubling thought - when I crashed my original
ZXR750 in 1989 at Pembrey, the headstock went out of round, and the
head races wouldnt fit properly anymore...

[1] One of the best purchases Ive made in the last year - 35 quid for
a digital set from MachineMart.
--
Champ
I dont know, but Ive been told, never slow down, you never grow old
GSX-R 1000, GPz 750 turbo, ZX7RR Endurance Racer x 2
GYASB#0 BotToS#2 BOTAFO(T|F)#35 WG*#1 DFV#8
Team UKRM Racing : www.team-ukrm.com

On Wed, 18 Aug 2004 09:10:39 +0100, Champ wrote:

>Ive just had a very troubling thought - when I crashed my original
>ZXR750 in 1989 at Pembrey, the headstock went out of round, and the
>head races wouldnt fit properly anymore...

A very worrying but accurate thought as the guy at Crescent said
exactly the same thing :o(

Assuming that is the case, any idea where I can get it checked/fixed?

--
Daz

On Wed, 18 Aug 2004 09:41:57 +0100, Daz
wrote:


Get some verniers[1], and measure the inside diameter of the headstock
in lots of different directions. The variation should be less than a
10th of a mm (and that will only be measuring variation, iyswim).
Much more than that and its time for a new frame :-(
Also, the measurement should be the nominal measurement of the outside
of the headrace bearing/insert - the whole headstock could have been
enlarged by the impact.

[1] really, you should. 35 quid from MachineMart, as I said before.
--
Champ
I dont know, but Ive been told, never slow down, you never grow old
GSX-R 1000, GPz 750 turbo, ZX7RR Endurance Racer x 2
GYASB#0 BotToS#2 BOTAFO(T|F)#35 WG*#1 DFV#8
Team UKRM Racing : www.team-ukrm.com

Champ wrote:

Digital Verniers? How does that work then?

--
ogden, b12, speaking only for himself and certainly not for his
jumped up gestapo of an employer.

Champ wrote:

As cool as digital Vernier calipers are, whats wrong with the good
old-fashioned calipers where you had to know what a Vernier scale was to
use them?

ogden wrote:


Heh.

As Im sure you probably know, theyre Vernier calipers, but they also
have a digital readout for the numpties that dont know what a Vernier
scale is.