Shiny's 1980 CB750 F...happy with pods.

[Hoko]

Nice job Shiny, that front fender looks much better

[shinyribs]

Thanks Hoko!

Too bad it won't run now. Not a clue. Of course,I haven't checked anything either.

[shinyribs]

Sometimes it's the little things that bug you the most. Like a seat cowl that just refuses to lay flat.



I've talked to a few other guys that have these F models and their seat does the same thing. I've had this thing on and off countless times and I just can't figure out what the deal is. But you can take your finger and just barely touch the rear cowl and it lays down. Almost zero pressure.

So I just added a little strap to help hold it down. It's not much. Fastens to existing holes( turn signal mount & seat pan-to-cowl screw). A little black paint and it will hide nicely.



Ahh,that is SO much nicer.

[shinyribs]

Got tired of looking at these fat footpeg thingy's. They have a bunch of webbing on the back side that I used as a guide. I'm pretty happy with how it turned out.

Yes,my shop is always a mess...

[rich]

Really a dramatic change, they look a lot better now.

[hondacb750f]

that's tuff.

[750mors]

Hey Shiny,

Great read you have going here. Loving the ingenuity! Curious to know if you bought the tacho drive plug off the shelf or turned it yourself? I've been searching for one for some time now without success.

Thanks in advance,

Matt

[shinyribs]

750mors wrote

Hey Shiny,

Great read you have going here. Loving the ingenuity! Curious to know if you bought the tacho drive plug off the shelf or turned it yourself? I've been searching for one for some time now without success.

Thanks in advance,

Matt

Hey, thanks man. I did make that tach plug myself. There was another fella here that was wanting one, so I have another one made up already. Finding where I put may be an issue though.

[750mors]

Wow, great job on turning that up. Yet another example of why I want a lathe.
If you happen to come across that spare plug, or the inspiration to turn another one just let me know and the money is on it's way.
It would tick one more problem area off of my build!
Matt

[shinyribs]

Hey bud, I just made up a batch of plugs yesterday. Holler at me if you're still interested. Thanks for the compliment!



So, I laid this bike down and today is the first chance I've had to really take a look at it. I have spark on all four cylinders,so apparently my ignition spinny thingy was just fine. When you go to start the bike it snorts,pops and backfires... perhaps it's off time mechanically? I just can't imagine what could have happened that would have caused that? The thought crossed my mind that when the bike smacked the pavement that it could have caused a cam chain tensioner to break allowing this. I dunno. I'm gonna study up on the FSM,but I'm open to any suggestions as well.

Oh,and my cold start issue is a non-working accel. pump. It pumps fuel like Grant took Richmond when I bench test it, but as soon as it's on the bike it won't squirt.  One thing at a time...

[750mors]

That sucks that you put the bike down shiny, it does sound like the timing could have been knocked out. Luckily for you, on these bikes it's an easy check and adjustment. Likewise with the crank to cam timing, it's just a matter of getting the top cover off and the FSM will show you where the reference marks should be relative to both cams and the crank. Like you say, one thing at a time.

As for the plug, I'm absolutely still interested. I'll PM regarding it.

Matt

[shinyribs]

Well, any vehicle that is capable of triple digits speeds that you park by leaning it on a stick is bound to fall over at some point.

I got your email and replied. Thanks!

Oh, there are two different types of plugs. Check out which one you'd rather have here.

[750mors]

Better that it falls while on the stick than at said speeds though.
I've done both and will take a driveway drop any day. :D

Matt

[shinyribs]

lol. I know what you mean. I preferred the driveway drop too.


So I figured out the issue. I set the motor up to check static timing and my pointer was way off.

It was supposed to look like this:


But with everything correctly installed my rotor pointer was well over 180* out of phase:


Turns out, the rotor is simply pressed on to the main stem of the ignition advancer. So when the gravel got in there it apparently caused it to just get all jammed up and the rotor got spun out of phase on the shaft. A careful twist with a large pair of channel locks and she roared to life.

[750mors]

Good to hear she's alive again! Strange that the rotor is just pressed on though, I thought they had a key way for alignment. 

On 18 May 2014, at 6:33 pm, "shinyribs [via Honda CB750'S]" <[hidden email]> wrote:

lol. I know what you mean. I preferred the driveway drop too.


So I figured out the issue. I set the motor up to check static timing and my pointer was way off.

It was supposed to look like this:


But with everything correctly installed my rotor pointer was well over 180* out of phase:


Turns out, the rotor is simply pressed on to the main stem of the ignition advancer. So when the gravel got in there it apparently caused it to just get all jammed up and the rotor got spun out of phase on the shaft. A careful twist with a large pair of channel locks and she roared to life.

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[free2ride]

shinyribs wrote

apparently my ignition spinny thingy was just fine.

I love it when you get all technical on us.

[shinyribs]

Hey, I did call it an ignition advancer later on.

And the non=working accel pump is working now. No clue why. I broke the rack down and double checked all passages and o-rings again. Still found no leaks or blockages like before. I did it all over a white towel just to make sure I would see anything that would happen to fall out. I dunno,maybe my diaphragm is failing,but it seems solid. Time will tell! Now on to Toolbabes parts...

[Hellbilly429]

#dohc problems

Glad you're safe and hope the bike is good to go for ya now shiny

[shinyribs]

Thanks buddy. Gear saved my butt. I've taken a few short trips without it before,but I won't ever again.

Here's the minimal amount of damage from the slide.


I can't believe it didn't even crack the glass in the mirror.


And the slightly scuffed and bent kick stand.


I did get her all buttoned up tonight (this morning??). Hope it doesn't leak! I was gonna buy a replacement,but thought this might look kinda racy...turns out...it's just looks patched.  Oh well...

[TOOLS1]

I kind of like the welded up/patched cover. You could always turn it down on that fancy lathe you have.
TOOLS