Ross’ 1975 CB750

[Galactica]

Oh man. Don’t ask me to repeat the effort.  Not happy with it anyway. 

[Twisted_Twin]

Looking great Ross! Well done!

[Galactica]

So, yesterday I took the CB750 out for its first real shakedown ride.  Roy and I rode out to Agassiz.  There was a fellow out there who was selling a Dyna electronic ignition for $35.  I reckoned if it’s in working order, that’s a pretty good deal.  In any case it was a good reason to get my ass out for a ride. 

We headed out on the freeway.  I wanted to run it at speed and temperature to burn off the moisture that has been in the crankcase since I started it.  The bike ran well, as I expected.  An issue that’s become very apparent is the amount of effort it takes to turn the throttle.  It was an inordinate amount.  I’d only run it about 100 miles around town at this point.  I put it down to an overly strong carb return spring.  But as our ride progressed, the wrist twisting effort became greater, and the throttle seemed to catch and bind upon input.  Hmmm.

So this evening I pulled the tank and disconnected the throttle cables.  The return spring seemed absolutely fine when actuated be hand.  Hmmm.  The pull cable seemed a bit catchy though.  I opened up the right hand switch block to access the throttle grip tube.  Disconnected and inspected the cables there.  Really odd.  On the pull cable, the inner sheath had been pulled up and was wrapping along with the cable around the throttle tube.  Apparently, somehow the sheath has been pulled from inside the cable housing.  I pushed the inner sheath back down out of the way and applied some 3in1 oil.  Reconnected the cables to the carbs.  Feels great.  Now, if the issue reoccurs, I’ll have to replace the cable.  Cheap Chinese sh*t. 

Another small issue I noticed was a catch when I applied the rear foot brake.  I found that I had the upper bolt of the brake torque arm installed the wrong way.  The threaded end was catching on the actuator rod.  I removed the bolt, flipped it around so the threaded end was the other way.  Clearance achieved. 

These operations were performed under the influence of wine with dinner and bourbon afterwards.  So I’ll not be testing my repairs this evening.  That’ll wait until the ride to coffee at the Fort tomorrow.

[Hawkeye]

Ross, when I put a Dyna on my '77 CB750 some years ago, it was $180. I'd say you did well.

[Steve G.]

  50 year old cables tend to act like 50 year old cables.

[Galactica]

  50 year old cables tend to act like 50 year old cables.

These are new aftermarket cables.