My Nighthawk: 750SC

[seestheday]

Looking good.  

[seestheday]

I haven't seen anyone answer your question about the dynojet kits.

I have heard some people have had success getting pods to work with them, but most don't bother.  If you want to run pods the general feeling is that you should get some direct lift carbs as opposed to CV carbs.
Pods are possible with these carbs, but are a performance loss unless you tune/jet them just right, and then you can get back stock performance.

What are your plans for the bike?  Are you planning on doing a lot of performance mods?

[mk3brent]

Thanks for the replies.

Firstly, yes! The soda blaster does work very well.
I did my blasting outside, and was a big mess. No worries though.

I would definitely recommend NOT using water first to try and rinse everything off, as it will become a thick paste. Even with ample taping and covering, I still got a ton of soda in the cams. I flushed out the system very well with oil/marvel mystery oil to make sure it's all out of there. Don't want to go about scratching stuff up or destroying seals.

As for the jet kit...
I bought a mint air-box with filter and clamps and am going to still end up jetting the carbs.
Nothing fancy for performance, just new coils, wires, and open exhaust. (4-into-1.)

I just want a strong, reliable running bike. (Not trying to push it to the limits at all, just fun and peppy.)

[mk3brent]

Doing a couple things I can update here with:

Stripped the frame some, and am stripping it further today and possibly into the weekend to get it down to the steel to repaint.



I have a bunch of small parts I'll be sand blasting today to get ready for paint.

Parts like the swing arm, shifter/sprocket cover, clutch cover, stator cover, pulse generator cover.. etc

Will post pics maybe tonight.

[mk3brent]

Nice clean parts!

[shinyribs]

How did I miss this thread??? Awesome progress bud. I love those wheels!

[mk3brent]

Thanks, man.

Little steps at a time, trying to make everything as perfect as I can.
This is my first CB, but hope it's not my last.


After I get my brass wire brush dremel attachments, I'm going to finish up the engine to put back in the frame. (Scary thing is, I have no idea what condition the 900cc is in.)

Could be wasting my time, but I'd rather clean it now... :-\

[mk3brent]

Some more cleaning to do.

[mk3brent]

Stripped the frame, and primed:




Cleaning and rebuilding the calipers.
Going to get new custom length hoses/lines for these:

[mk3brent]

Not my best paint job, but will get the job done.
Will probably look a little better after I wax and buff them.

[sgtslag]

That black is amazing.  Really looking forward to seeing it all come together.  It will definitely turn heads -- hope it doesn't cause any accidents with distracted drivers...    Cheers!

[seestheday]

Damn, you are really moving fast on this project.  Great work.

[mk3brent]

Thanks for all the kind words, friends.

Came home from work today, and started on the 2nd brake caliper.
This one is a tad nastier than its brother.

The pad slider rods were stuck in there pretty good, but it came out after I realized they come out the other way... haha.

Couple pics of the caliper, pistons, and seals:












I think I deserve these. :-)




I got the first coat of paint going on the swing arm.
I didn't take a picture of it primed, but it's the same as the frame.
Kind of an Army green self etching kind.

Will post more pictures later.

[mk3brent]

I think I'm going to check the valve clearances before I button up the valve cover.

All I have is the 750 shop manual.

Are the clearances the same for a 900?

I'm assuming they probably are.

After hearing cam chain slap videos it makes me worried this one will do that. haha

[seestheday]

You can download the 900 manual from cb750c.com.

Sent from my BlackBerry device

From: mk3brent [via Honda CB750'S]

Sent: Wednesday, June 19, 2013 10:47 PM

To: seestheday

Subject: Re: My Nighthawk: 750SC

I think I'm going to check the valve clearances before I button up the valve cover.

All I have is the 750 shop manual.

Are the clearances the same for a 900?

I'm assuming they probably are.

After hearing cam chain slap videos it makes me worried this one will do that. haha

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NAML

[mk3brent]

Yeah, that's what I did.

Found a scanned copy of the haynes





Looks like the same. 2 to 5 mil.

I'll check those tomorrow.

[mk3brent]

Glad I checked the valve clearance.
They're all pretty bad out of tolerance.

Here's the worst one!



My strategy here is to label these cams, then purchase the valve shim tool to depress the springs and remove the shims. Next, remove the cams and spec them to see if the lobes are in tolerance.

I'm guessing I can steal some shims from the locked up 750 I have.
I'll have to cut the timing chain off of it to rotate the cams.

[seestheday]

You might get lucky if you can swap some of your shims around.  That is assuming that some are tight and some are loose.

You don't absolutely need the shim depressor tool, but it does make it easier.  The OEM Honda tool is effectively just a big screwdriver.

Also, you should really be measuring that at TDC on the compression stroke.   That is when you really want to make sure that the valves are fully closed.  The lobes should be pointing away from eachother.  This is detailed in the FSM.  Maybe you did this and the lobes are pointing up for the pic.

Get those between 0.04" and 0.06" and you'll be golden!

[mk3brent]

Ja, I take measurements with the valves fully seated.

I just bought the depression tool like this:

[mk3brent]

Started cleaning the 2nd caliper.
It's coming along alright.

I decided to re-paint the valve cover. The small pits and junk just didn't look very good, so I sanded it down and resprayed it to see if it comes out any better.

The frame is coming along alright as well. (Rattle can is very time consuming. haha)

More pictures tomorrow! Going to do some more work.

Might clean up the exhaust manifold and mask it for paint.