Topic: Fuel Pump Question

[Rosinante]

The bike is a 1978 CB750K.  I believe this bike has ran out of gas by a PO.  Knowing as I do that modern electric fuel pumps are gasoline-cooled and become damaged by running empty, I wonder if I should replace the pump before it leaves me stranded.

Second question:  What kind of antifreeze-coolant should I use?

Third question:  While riding down the road, I notice that the bottom of my tires are not moving (obviously, since they are in contact with the road surface, which is stationary), but the tops of the tires are moving at approximately twice the velocity being reported on the speedometer.  Is the speedometer averaging these two speeds?

Fourth question:  After stopping at the bar on the way home for a few happy-hour cocktails    the bike seems to handle more poorly.  I wonder if my swing arm bushings are affected by the darkness, or perhaps the cooler temperatures in the evening.

[BobbyR]

This is a real pisser. 

[Rosinante]

Awww.....you guys are no fun.

[Bob Wessner]

My suggestion is to stop at the bar first. Then most of these problems will disappear. 

[Simon]

First, we would need to know if your bike is FWD or RWD. I don't think Honda had a CB750K in 4WD in 1978, did they?

[lone*X]

The FWD model was a real hoot to ride I hear.  As the story goes it worked better in reverse.

[TwoTired]

The bike is a 1978 CB750K.  I believe this bike has ran out of gas by a PO.  Knowing as I do that modern electric fuel pumps are gasoline-cooled and become damaged by running empty, I wonder if I should replace the pump before it leaves me stranded.

No.  Just put more gas in it;  87 octane, pump rating method.

Second question:  What kind of antifreeze-coolant should I use?

How hot/cold do you get now?  
Anyway warm air if it is cold, cold air if it is hot.  Personally a hot beverage will help keep me warm when it is cold out.   And an iced tea will make me feel cooler when it is hot out.

Third question:  While riding down the road, I notice that the bottom of my tires are not moving (obviously, since they are in contact with the road surface, which is stationary), but the tops of the tires are moving at approximately twice the velocity being reported on the speedometer.  Is the speedometer averaging these two speeds?

Yes, in their own interpretive way.  But, this is not a problem if you keep your eyes on the road, too.  However, the eye doctor bills may become annoying.

Fourth question:  After stopping at the bar on the way home for a few happy-hour cocktails    the bike seems to handle more poorly.  I wonder if my swing arm bushings are affected by the darkness, or perhaps the cooler temperatures in the evening.

You may wish to review your current anti-freeze choice.  And, the symptoms may be coupled with overfilling the reservoir.
Also, not including the bike in recreational behavior, can make it vindictive and ornery enough to buck you off.  This does, however, help in keeping you eyes on the road, as in full contact.

Don't you think this thread belongs in the open forum?

[tramp]

you need to read the owners manual
it's right behind the muffler bearing

[Old75_ratafe]

you need to read the owners manual
it's right behind the muffler bearing

Wait someone found one I have been trying to find one for years.... 

Oh and a question do all these symptoms tend to happen after the bar perhaps? 

[Frankenkit]

here you go.  one muffler bearing for $49.00. Not sure what they want for shipping though.
http://kalecoauto.com/index.php?main_page=product_info&cPath=3&products_id=10 

you might want to order some tire beads with that
http://kalecoauto.com/index.php?main_page=product_info&cPath=3&products_id=36


If you need antifreeze, you're not drinking enough alcohol, which has intrinsic anti-freezing qualities.  Newton developed your fuel pump and if that's giving you problems, then God help you.

[Frostyboy]

......  Knowing as I do that modern electric fuel pumps are gasoline-cooled and become damaged by running empty, I wonder if I should replace the pump before it leaves me stranded.

This same question arose with a mate of mine. He asked me to help him out. What I had to do was firstly take up the hobby of putting ships in bottles. Once I mastered that I had to learn to take 'em back out again.
Eventually I was able to remove the pump from the tank.
The pump was fine, but the problem lay with the 'o' ring between the pump & the filter in the pump module. It had dried out/shrunk & was simply circulating fuel within the tank.
I found the 'o' ring was the same as an '05 Camry pump module. It worked fine once it was back together.

btw, has everyone checked their headlight fluid lately?

[dave500]

head light fluid has been banned in australia and is unavailable due to the daylight saving act,,it appears that it was being used to milk cows early and causing others to wake early,leakages were also found pooling in drain pipes which under all government rules is banned as it gives light at the end of the tunnel!

[Markcb750]

Start with this:

Honda CB fuel pump fundamentals


Additional information here.

Detail Honda CB fuel pump analyisis

[Frostyboy]

.....under all government rules is banned as it gives light at the end of the tunnel!

But the gov't (or Qld motorways at least) has installed lights at the end of the Clem7 tunnel for video matching of registration numbers. Does that mean that the gov't is in contravention of their own rules?
I know this is getting off topic, so just to update:
The f/pump is still running fine on the mates bike. The coolant temp sensor however hasn't been the same since adding pepper to the antifreeze to take up a small leak in the heater core.

[Frostyboy]

lmao @ Newtons law

[dave500]

pepper wont seal a leak!!you have to use chicken salt,,then go really really slow.

[cb650]

This place will have all the answers and proper parts for you.  

http://kalecoauto.com/index.php?main_page=index

[BobbyR]

All of this is fine but unless you change the chip the motor cannot reach it's full potential. You can get them here. www.chipsanddip.com

[Old75_ratafe]

......  Knowing as I do that modern electric fuel pumps are gasoline-cooled and become damaged by running empty, I wonder if I should replace the pump before it leaves me stranded.

This same question arose with a mate of mine. He asked me to help him out. What I had to do was firstly take up the hobby of putting ships in bottles. Once I mastered that I had to learn to take 'em back out again.
Eventually I was able to remove the pump from the tank.
The pump was fine, but the problem lay with the 'o' ring between the pump & the filter in the pump module. It had dried out/shrunk & was simply circulating fuel within the tank.
I found the 'o' ring was the same as an '05 Camry pump module. It worked fine once it was back together.

btw, has everyone checked their headlight fluid lately?

You know back in the old old OLD days their was headlight fluid.... Kerosene lamps were on the first cars a few people on this forum may be old enough to remember that    Then again they also had to start their cars by lever action.

Also, if anyone comes across a left handed smoke shifter for a 32 kaiser let me know.

[Frostyboy]

Also, if anyone comes across a left handed smoke shifter for a 32 kaiser let me know.

Damn!!!  I saw a Electro-Pneumatic Smoke Shifter at a garage sale a couple of weeks ago. I don't know if it was left or right handed or even if would suit the 32 Kaiser though, I didn't pay that much attention.
Sorry.