Author Topic: Just picked up a 1978 CB750K  (Read 629 times)

0 Members and 1 Guest are viewing this topic.

Offline craig516

  • Full Member
  • *
  • Posts: 4
Just picked up a 1978 CB750K
« on: August 06, 2015, 08:43:14 PM »
Hello, I am new to this forum. Well, I have had at least one motorcycle every year since May, 1968, when I bought a brand new Honda CL350 Scrambler ( I think that is right, CL for the Scrambler)(yes, I am really that old). Never buy first year. Now I have last year SOHC CB750K that looks like new. My best Bud gave it to me. He has always been a Honda SOHC guy, I have always been a Kawasaki guy. He likes high pressure oil and babbits, I like low pressure oil and ball bearings. He and I have been all over the U.S. and Canada. Iron Butt.
For the bike: I just rebuilt the front brake master cylinder (real pain) and caliper as the bike was in storage for sixteen years. Fuel tank looks like new inside and carbs were fully drained, float bowl drain plugs and inside look great, no brown or green. Might have to rebuild the accelerator pump.
Have not started the engine yet, but it turns over smooth and the cylinders were fogged before storage. It has Progressive Suspension front end parts and Koni rear shocks, needle swing arm and balls in the neck.. Rats nest in the headlight shell just like my '68 350. Removed the Vetter Fairing and Sissy Bar...Hooeee!
I plan to make it look like it did on the showroom floor.
Thirty Seven years old, should be an interesting build.

Online calj737

  • Really Old Timer ...
  • *******
  • Posts: 21,070
  • I refuse...
Re: Just picked up a 1978 CB750K
« Reply #1 on: August 07, 2015, 04:44:44 AM »
Welcome! We like pictures. Even of bikes!
'74 550 Build http://forums.sohc4.net/index.php?topic=126401.0
'73 500 Build http://forums.sohc4.net/index.php?topic=132935.0

"Of all tyrannies, a tyranny sincerely exercised for the good of it's victim may be the most oppressive. It may be better to live under robber barons than under omnipotent moral busybodies. The robber baron's cruelty may sometimes sleep, his cupidity may at some point be satiated, but those who torment us for our own good will torment us without end for they do so with the approval of their own conscience." - C.S. Lewis

Offline Stev-o

  • Ain't no
  • Really Old Timer ...
  • *******
  • Posts: 34,400
  • Central Texas
Re: Just picked up a 1978 CB750K
« Reply #2 on: August 07, 2015, 05:45:18 AM »
Welcome from Texas.  What model Kaws? I have a couple...
'74 "Big Bang" Honda 750K [836].....'76 Honda 550F.....K3 Park Racer!......and a Bomber!............plus plus plus.........

Offline TomsK8resto

  • Enthusiast
  • **
  • Posts: 134
Re: Just picked up a 1978 CB750K
« Reply #3 on: August 07, 2015, 06:39:13 AM »
craig516,

Welcome from Tucson!  I recently picked up a '78 K bike and it too had a Vetter fairing on it. Currently working at getting it close to stock and street worthy.  I  know what you mean about the rats nest in the headlight bucket.  Good Luck.

Tom
'69 CB750 long gone
'76 CB750F gone
'78 CB750K in progress.....
'09 H-D Roadglide

Offline craig516

  • Full Member
  • *
  • Posts: 4
Re: Just picked up a 1978 CB750K
« Reply #4 on: August 07, 2015, 06:00:42 PM »
Yes, I still have to get my pictures up. As for Kaws, I TRULY miss my '75 H1, went to Prince Rupert, BC on a '78 Z1R. Loved my '84 Eddie Lawson Replica, and my 1977 KZ750 twin was everything a Triumph wanted to be but was not. THAT bike would have made a cool Cafe bike. The '82 J2 was like driving a John Deer, but narrow tires, still, I rode it all over most of the U.S.. The '82 GPZ 750 was a POS. Standing behind it the swingarm rails were different heights with an axel parallel to the ground. It would pogo around a corner and AGAIN, narrow tires. I traded it in on the J2,and found the cam chain BESIDE the cam chain tensioner. OH, YEAH, that was because they were made by rednecks in Lincoln, Nebraska (gloppy welds, mis-aligned parts). 1982 through 1984 were bad years for Kawasaki, due to the stupid rednecks assembling and welding up the units. That was also during the time, Harley-Davidson was whining they could not sell any bikes, never mind they wanted $8000 for a unit sitting in a puddle of its own oil (you could buy a Kawasaki 650 for about $1200). Congress put import tariffs on assembled Japanese bikes, so they made them here in 'Merica. With the resulting problems. Harley-Davidson hired some engineers (fired their blacksmiths) and the Evolution engine was born, along with Japanese suspension and carbs. My HOG magazine has reports of "Harleys" getting 300,000 miles.
Yes, I know, too much info, sorry. I love scoots, spent seven years on the AMA/WERA Superbike circuit so I am VERY aware of what is going on. Thanks for letting me blab on.

Offline Stev-o

  • Ain't no
  • Really Old Timer ...
  • *******
  • Posts: 34,400
  • Central Texas
Re: Just picked up a 1978 CB750K
« Reply #5 on: August 07, 2015, 09:18:34 PM »
No, not too much info.  Sounds like you've been deep into bikes, a good thing.

Here's my current project, an H1E.   Motor fully rebuilt and runs fantastic.  Working on the cosmetics now.....





Can't believe you sold yours.
'74 "Big Bang" Honda 750K [836].....'76 Honda 550F.....K3 Park Racer!......and a Bomber!............plus plus plus.........

Offline craig516

  • Full Member
  • *
  • Posts: 4
Re: Just picked up a 1978 CB750K
« Reply #6 on: August 08, 2015, 10:00:33 PM »
Mine was orange and white, a '72, screw down side-covers that would vibrate loose and fall off. It takes a sick person to invent such a thing...must be why I liked it so much. It was kick start only, bouncy and surged as you hauled down the freeway, stone-age by todays bikes, but you either loved or hated one. For people who don't know, for every ONE turn of the crank you had THREE power strokes...what's not to love? Remember, ALL of those machines could be induced into tank-slappers. Moved, needed to sell it. Yours looks great, BTW. If you enjoy yours half as much as I enjoyed mine, you will be just fine. Thank you for the pic.

Offline Stev-o

  • Ain't no
  • Really Old Timer ...
  • *******
  • Posts: 34,400
  • Central Texas
Re: Just picked up a 1978 CB750K
« Reply #7 on: August 09, 2015, 05:10:58 AM »
Mine was orange and white, a '72, screw down side-covers that would vibrate loose and fall off. It takes a sick person to invent such a thing...must be why I liked it so much. It was kick start only, bouncy and surged as you hauled down the freeway...

I've learned to keep a bottle of Loctite on hand!   Mine doesn't surge, motor has been completely rebuilt, typically starts on first or second kick. 
'74 "Big Bang" Honda 750K [836].....'76 Honda 550F.....K3 Park Racer!......and a Bomber!............plus plus plus.........

Offline craig516

  • Full Member
  • *
  • Posts: 4
Re: Just picked up a 1978 CB750K
« Reply #8 on: September 27, 2015, 11:00:08 PM »
Yeah, the early 500's were piston port and surged at freeway speed, not a lot, but noticeable. Kaw made some changes with the sophisticated machine you show, to eliminate the surging and some other small problems. People who have never ridden a hot 2-stroke are missing the ride of a lifetime. I raced an RZ350 for a year to add the "D" Superbike and RZ Cup to my list. Port, head and carb work, expansion chambers with little cans on the stingers, new reeds, etc. Could not keep the thing on the ground in the first two gears and it would stand up anytime it was in the band. Great showoff bike  :D The H1 started on the first kick but I ran conventional oil so it smoked a little. The RZ ran Bel-Ray Si-7 and only smoked at start up and the plugs were never oily, just a nice gold color. Again, sorry I talk so much. Thanks.