Thanks for the info Dennis. I'll be putting my "new" top end on next week.
I bought it minus the chain so I needed to know this. I agree on using a torque
wrench too. I've made that mistake, I.E. breaking a bolt and it SUCKS. I love
my bike but these Japanese bolts just aren't as strong as good ol' American
steel. Paul...don't fret too much, just pay close attention, do what Dennis
says and get 'er done! If you have any doubts take photos as you go. If you
want to see what I've done on my Nighthawks or Harley go to the Photobucket
site and type in "HotrodMamma". I'm going to cut some gaskets for my Nighthawk
soon and will post a how-to. The cam cover gaskets are hard to get and
expensive. I can make one for $4.00 plus my time. I'm going to keep a pattern
for later too. HotrodMamma.
----- Original Message -----
From: Dennis Hammerl
To: [email protected]
Sent: Thursday, August 27, 2009 11:09 PM
Subject: [Nighthawk Lovers] Re: 83 cb650sc cam chain tensioner parts -
difficulty finding
Get a grip. Not all parts are updated at the same time. Without my
asking a counter person to check, I recall that there is only one update spring
and a couple of updates to the tensioner assy. You do or do not have the OEM
manual ? Not Clymers book of the dead or some such. Please take the time to
read the common service manual. All specific manuals are based on the viewer
having done this. Cam sprockets are marked with lines that are to be in line
with the head surface. Study the manual before disassembly and take pix if
needed. Do not play switch with any parts. Replace each part (tappet adjusters,
cam followers, cam journal caps, etc) in the EXACT place it came from. Lay
parts out in an orderly fashion in a place that will not be disturbed by kids
or pets. Do not introduce any new variables by a careless assembly. A light dab
of grease on the cam lobes willl do,a drop or two of oil on each journal. Fill
anti-foam chambers with oil. Before replacing the head cover, remove the plugs
(should be out already) and spin the engine over with the starter. Repeat in
short bursts untill oil is seen flowing.
You want tips ? Here's one. Some tech's have called me over because the
cam chain isn't long enough... duh. It did fit. What happens is that it "drops"
a link under the crankshaft. You will need to rotate the crank a bit while
holding the chain up and it will straighten out.
The possibility exists that you are a he-man. Use a torque wrench on
ALL fasteners. It's way too easy to strip the 6mm bolts that used throughout.
Start each one with fingers to make sure you don't strip any. Specs are in the
front section on the manual.
Service bulletins from that time are all on paper. Where ours got to
after all these years may be a chore to locate. Rob may have taken them when he
left. Just stop fretting about all this and be glad you can get parts. The
original (questionable) parts have disappeared. ONLY updated parts are
available. Honda bought back those many years ago.
I lied. I've only got 37 years with Honda. 42 total. First with Suzuki
and Yamaha.
Wanna' "degree in" the cams ? Makes 'em fly. Advanced procedure, but
big performance boost.
--- On Thu, 8/27/09, oldschoolgwin <[email protected]> wrote:
From: oldschoolgwin <[email protected]>
Subject: [Nighthawk Lovers] Re: 83 cb650sc cam chain tensioner parts
- difficulty finding
To: "Nighthawk Motorcycle Lovers!" <[email protected]>
Date: Thursday, August 27, 2009, 11:39 PM
Thanks Dennis.
Do you suspect the -010 tensioner bracket had the modifications that
"improved" the tensioner from the original?
Do you now of a technical service bulletin addressing the repair of
the failure. I think this may be valuable to those of us with less
historical experience with the NH tensioner (42 years at Honda - wow
that's more knowledge than i can imagine). I tried to find a TSB on
the web but no luck.
Well i found a NOS spring (14514-ME5-010) at a Honda shop in Ohio - it
should be here in a few days - at that time i'll remove the tensioner
and measure spring force between the two springs (maybe that will
prove hopefull if there is a large difference).
It doesn't sound too difficult when reading the OEM manual but a bet
they leave a lot of the little tricks out. I guess just think
everything well through before you do it. I think I'll take a picture
of the cam sprocket allignment marks (with #1 at TDC compression)
before the removal to ensure it is reset the same after intall (that
part makes me a bit nervous!). The OEM manual was a bit unclear of
what cam mark alligns with what part of the head surface. And I won't
swap positions on any components.
Thanks,
Paul
Aug 26, 2:51 pm, Dennis Hammerl <[email protected]> wrote:
> Part sequence is .000 original, 010 first mod, 020 second mod.
>
> --- On Wed, 8/26/09, oldschoolgwin <[email protected]> wrote:
>
> From: oldschoolgwin <[email protected]>
> Subject: [Nighthawk Lovers] 83 cb650sc cam chain tensioner parts -
difficulty finding
> To: "Nighthawk Motorcycle Lovers!"
<[email protected]>
> Date: Wednesday, August 26, 2009, 3:18 PM
>
> Does anyone know where i can get the spring and tensioner bracket
> from, most places show them on the part finder but they are not in
> stocka and no longer made (at least by Honda).
>
> Spring: 14514-me5-010
> Bracket Tensioner: 14500-ME5-030
>
> I found a NOS bracket tensioner on Ebay but it is a -010. So it
went -.
> 01, -020, and the last is -030. I don't know if the -010 part is
the
> original with the problems that required the upgrade to the next
part
> revision
>
> At minimum I need the tensioner spring or there isn't much reason to
> take the bike apart. Yikes - no way to solve the chain rattle?
>
> Thanks for the help.
>
> Paul
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