Bill,
The clutch basket primary gears of course conflict with the primary
gears when you try to slide it off. To remove the primary gears you
have to remove the oil filter rotor cover first....remove the
phillipes head screw you saw inside the cover....then take an 8mm
bolt and thread it into the cover through the same hole as the
philipes came out of (that hole is thread to accept an 8mm "puller"
bolt). So now the cover is off....clean out that filter....find the
large nut at the bottom....bend down the locking tab.....use a penny
or piece of aluminum to lock the pimary/clutch gears and remove that
special nut....requires a tricky looking socket available at Honda or
several other locations for a few bucks.
Once that nut is off, tap the rotor a few times...it should loosen up
and come off...then slide the top primary gear off..and the clutch
basket will come off also (remember you have to remove the clutch
basket and oil pump housing at the same time).

More on the other topics a bit later...errands to run.
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
>