Bill,
Try David Silver Spares in the UK...they usually have some in stock.
But bear in mind, that is an obsolete part of course...so what's out
there is what's there...they aren't making them any more.
If you have a burnt valve then the valve seat is probably trashed too
and needs to be recut. Should probably take it to a good shop that
can do a valve job on it. I've seen valves and springs on ebay
numerous times. Decent used sets are ok (is this a race bike?).

Both of these places show CB160 Valves:
http://www.cmsnl.com/
http://www.davidsilverspares.co.uk/cgi-bin/dss2-cgi/Catalogue.pl

As for jets....I'd guess you'll have to go up perhaps two sizes on
the main jets, not sure what comes in the 160 stock.
JohnnyB



--- In CB175RaceTech@yahoogroups.com, "Bill Elliott"
<williamtelliott@...> wrote:
>
> Gentle Readers, I have been doing a little project of motor
> deconstruction in hopes of learning something of the workings of
this
> engine. All has been going well until recently, when I found that
> despite a service manual and a parts book, I am unable to remove the
> clutch and oil filter cover, etc. I see only the one screw holding
the
> cover and rotor. I have removed the clutch springs, disks and set
ring
> and the basket is ready to slide off - but hits the rotor. I am
> afraid to try to force it off, pry it off or smack it without being
> certain of the proper method. I cannot get the cover off the rotor,
> and I cannot pull the entire rotor off. Any suggestions? I'm about
to
> throw it in the car and haul it to Honda.
>
> As promised, the second question is one of supply. Does anyone have
a
> set of valves for the 160? and an inner spring or 2? (I found one
> broken spring, and a burnt valve.) Or can you point me to someone
who
> actually stocks them? I placed a $600 order Friday with a company
who
> on Monday told me they only had $15 worth of the parts in stock....
>
> The third question is about jetting. If I boost the 160 to 182cc
with
> the available kits, will I have to re-jet? and what size jet will I
need?
>
> Thanks in advance.
> Bill
>