Topic: CB750 K0 vs K7

[freggy]

Hey
I'm thinking of buying a CB750 K7 but actually i like the tank and seat of the earlier 750's more than the ones on the K7 version.
Is it possible to change this without modifications?
Are there other major differences between those bikes?

Thanks

[moham]

check out this thread...

http://forums.sohc4.net/index.php?topic=32248.0

[pddpimp]

Ive done this myself on my K7. The early tanks mount in the same location. I used a 75-76 K tank so the petcock was on the correct side of the carb rack. I painted  it to look like a 71. The early tanks are an inch shorter in body length, but the mounting is the same.  So there is going to be a seat gap if the pan is not modified. I used the stock 77 pan and relocated the hinges. I then "cafed" the seat. It works slick. The early seat pans are too narrow for the hinge\lock locations on the later frames.

Looks like an older one to me, other than the side covers of coarse.

[eurban]

IMHO the cafe look is getting stale and cliched.  It is also difficult to achieve and yet keep the possibility of riding riding two up.  For my 78K project I wanted to clean up the stock bike, give it a more muscular look, but still keep good level of comfort and long distance rideability.  For me, these bikes are defined by their four pipes,  and with the cannons on the back, the large stock seat and tank balance it out.   The early tanks and the F tanks look a bit narrow with my stock seat (which I am happy with) so the late tank suits me fine.  I am going to seal up the flap and install a flush mount pop up cap on the tank before the professional paint job happens.  I am also going to fill in the badge area and create an round indent for an old school small round Honda wing emblem (superhawk I think)  Here's an older pic of the bike before I went to smaller grips and bar end mirrors . . .

[moham]

IMHO the cafe look is getting stale and cliched.   The early tanks and the F tanks look a bit narrow with my stock seat (which I am happy with) so the late tank suits me fine.   I am also going to fill in the badge area and create an round indent for an old school small round Honda wing emblem (superhawk I think)  Here's an older pic of the bike before I went to smaller grips and bar end mirrors . . .

You make a good point about originality. It seems like there are a lot of different ways to get a new/different look with the original pieces. Paint/No paint, trim, decals, striping, etc if done well and thought-out can, it seems to me, achieve a lot...

[TwoTired]

IMHO the cafe look is getting stale and cliched. 

+1

....

IMHO


Besides Carpy, has anyone actually increased the sales value of these old bikes with a cafe conversion?  Compared to a stock restoration, that is.

Speaking, of tanks.  I need one for my 750 F2 restore!  Why waste it on a K model?

Cheers,

[pddpimp]

IMHO the cafe look is getting stale and cliched. 

+1

....

IMHO


Besides Carpy, has anyone actually increased the sales value of these old bikes with a cafe conversion?  Compared to a stock restoration, that is.

Speaking, of tanks.  I need one for my 750 F2 restore!  Why waste it on a K model?

Cheers,

Most of these guys on this board aren't concerned about resale. It seems that what looks good to them is what counts. If using some "cafe" style is what they like, then cool. Some like bobbers, choppers, stock, ect. And thats cool too. I myself like stock, mild cafe, some bobbers, not too into the choppers, but thats me.

If I remember Freggy was just asking to see if the older stuff will fit on the newer frames. Nothing mentioned about cafes. I hope I could help him with that.

Going out to enjoy the snow.

[jevfro]

IMHO the cafe look is getting stale and cliched.  It is also difficult to achieve and yet keep the possibility of riding riding two up.  For my 78K project I wanted to clean up the stock bike, give it a more muscular look, but still keep good level of comfort and long distance rideability.  For me, these bikes are defined by their four pipes,  and with the cannons on the back, the large stock seat and tank balance it out.   The early tanks and the F tanks look a bit narrow with my stock seat (which I am happy with) so the late tank suits me fine.  I am going to seal up the flap and install a flush mount pop up cap on the tank before the professional paint job happens.  I am also going to fill in the badge area and create an round indent for an old school small round Honda wing emblem (superhawk I think)  Here's an older pic of the bike before I went to smaller grips and bar end mirrors . . .

I like that look alot!  Kinda what I'm after w/ my 2up dunstall seat and longer f tank on a 75 cb750 K.


sorry for the hijack but I am curious are those cannons emgo dunstall replicas, some other repo, or custom?  How hard was it to fit? 

[754]

That red bike looks really good .. JMO..

[eurban]

Those cannons are stock 750 k8 4-4 pipes, heavy and currently made of unobtanium (although I think DSS has reproductions now available.). . . . I would guess that most of those here modding their bikes (whether it is as a cafe, chopper or otherwise) are not doing it to increase the value of their machine. Performance, aesthetics and the joys of building / working on your own creation would be much more likely reasons IMHO. . . .

[cafe750]

IMHO the cafe look is getting stale and cliched.  It is also difficult to achieve and yet keep the possibility of riding riding two up.  For my 78K project I wanted to clean up the stock bike, give it a more muscular look, but still keep good level of comfort and long distance rideability.  For me, these bikes are defined by their four pipes,  and with the cannons on the back, the large stock seat and tank balance it out.   

That was the idea behind my '73K. After I fell off of a corner and bashed my stock orange tank...(I cried a river over that), I decided that I wanted to mildly cafe' it and use stock Honda parts to tidy up the appearance of the bike. The biggest PITA was finding the early rear turn signal mounts....

[Bodain]

IMHO the cafe look is getting stale and cliched.  It is also difficult to achieve and yet keep the possibility of riding riding two up. 

Why would anyone want to ride a bike "TWO UP" ? <GRIN> That's what cars are for.

[troppo]

IMHO the cafe look is getting stale and cliched.  It is also difficult to achieve and yet keep the possibility of riding riding two up.

Why would anyone want to ride a bike "TWO UP" ? <GRIN> That's what cars are for.

depends on who the second person is 

[Joel]

IMHO the cafe look is getting stale and cliched.  It is also difficult to achieve and yet keep the possibility of riding riding two up.  For my 78K project I wanted to clean up the stock bike, give it a more muscular look, but still keep good level of comfort and long distance rideability.  For me, these bikes are defined by their four pipes,  and with the cannons on the back, the large stock seat and tank balance it out.   

That was the idea behind my '73K. After I fell off of a corner and bashed my stock orange tank...(I cried a river over that), I decided that I wanted to mildly cafe' it and use stock Honda parts to tidy up the appearance of the bike. The biggest PITA was finding the early rear turn signal mounts....

That's a nice looking bike.  I like the headlight visor.  What makes the early turn signal mounts different?  Both your front and rear signals look closer to the bike centerline than others I've seen.

[pddpimp]

IMHO the cafe look is getting stale and cliched.  It is also difficult to achieve and yet keep the possibility of riding riding two up.  For my 78K project I wanted to clean up the stock bike, give it a more muscular look, but still keep good level of comfort and long distance rideability.  For me, these bikes are defined by their four pipes,  and with the cannons on the back, the large stock seat and tank balance it out.   

That was the idea behind my '73K. After I fell off of a corner and bashed my stock orange tank...(I cried a river over that), I decided that I wanted to mildly cafe' it and use stock Honda parts to tidy up the appearance of the bike. The biggest PITA was finding the early rear turn signal mounts....

That's a nice looking bike.  I like the headlight visor.  What makes the early turn signal mounts different?  Both your front and rear signals look closer to the bike centerline than others I've seen.

The stem lengths on the turn signals are shorter on the earlier 70s bikes.

I also like the bike, I've been wanting an early exhaust system, but haven't been able to afford one.

[754]

Hey, how come no one asks about putting a 77/78 tank on an earlier CB model??   

[cafe750]

Thanks! Up through 72, the rear turn signals were mounted to short rubber mounted stalks bolted to the holes at the very end of the frame, with a small grab bar on the left side. My 73 had them mounted to the grab bar that went completely around the back of the seat. So, I basically found all of the stuff off of an earlier 750, and cleaned up the tail. The fronts are mounted to some short stalks that are just a splined stud on the signal end, with the mounting bolt on the other.

[pddpimp]

Hey, how come no one asks about putting a 77/78 tank on an earlier CB model??   

Well now...Hmm...

Kidding.

[Joel]

IMHO the cafe look is getting stale and cliched.  It is also difficult to achieve and yet keep the possibility of riding riding two up.  For my 78K project I wanted to clean up the stock bike, give it a more muscular look, but still keep good level of comfort and long distance rideability.  For me, these bikes are defined by their four pipes,  and with the cannons on the back, the large stock seat and tank balance it out.   The early tanks and the F tanks look a bit narrow with my stock seat (which I am happy with) so the late tank suits me fine.  I am going to seal up the flap and install a flush mount pop up cap on the tank before the professional paint job happens.  I am also going to fill in the badge area and create an round indent for an old school small round Honda wing emblem (superhawk I think)  Here's an older pic of the bike before I went to smaller grips and bar end mirrors . . .

Do you have any photos of the cap you'll be using?  It sounds like a cool idea.

[eurban]

Guess this thread is pretty well hijacked?  I actually took some pics of the gas cap to show prospective welders what they would need to work with.  The bung is steel and pop up cap is aluminum.  Push down and turn and the knurled puck pops up so you can grab it and turn out the cap . . .

[754]

Is that a Hotch cap?

 That will be a lot of work to put in, and I suspect the tank will look bigger with it.JMO

 If you could do a pushbutton for the lock hole & paint same color as the bike, that would look fairly clean..without giving up the never getting gas on the tank feature..

[eurban]

Not sure I know what a Hotch Cap is. Is that Matt? Hotch of Biker Build Off fame?  I purchased the cap from an online Harley Chopper type supplier but I don't remember exactly where. . .  I am not 100 percent sold on my plan to loose the flap system and put in a weld in bung but I will probably go ahead with and see how it turns out.  I certainly won't pay for the professional paint job on the tank unless I like it.  At one point I had imagined a monochromatic (black and two tones of silver) rising sun paint job with the cap as the center of the sun but keeping things simpler with less flash might be more consistent with the bike's direction so far.  Good thing about the late bikes is that parts like tanks don't go for huge $. 

[andy750]

Nice bike ppdpimp! I like the new style - like a 70`s muscle bike.

Cheers
Andy

[PxTx]

BTDT  This is a k8 tank on my 73.  Just dropped the tank on, ran a fuel line, moved the seat back a half position on the hinges, and mounted the seat lock rearward with only 1 stud.  It made the bike look complete and works fine.  It was a temporaty fix about 8 years ago.  Funny how things I do "temporarily" often become permanent.

Hey, how come no one asks about putting a 77/78 tank on an earlier CB model??   

Well now...Hmm...

Kidding.

[Joel]

It was mentioned that the later tanks are longer and/or larger.  Is there a difference in capacity and if so, how much?

[eldar]

Difference is about a gallon. The 77/78 tanks hold more.

[Egil]

Difference is about a gallon. The 77/78 tanks hold more.

F-model 17,5lit(4,8U.S gal)
K7-model 19,5 lit(5.1 U.S gal.4,3 Imp.gal)

[eldar]

The US k7/8 tanks hold about 6gallons US, including reserve.

[S-Dog]

well maybe I should sell my 2 75K tanks and get a big ole 78 for my ride.

[dave400]

The US k7/8 tanks hold about 6gallons US, including reserve.

How much petrol is that, in European litres? 

[Joel]

Difference is about a gallon. The 77/78 tanks hold more.

F-model 17,5lit(4,8U.S gal)
K7-model 19,5 lit(5.1 U.S gal.4,3 Imp.gal)

This is what the website tech spec sections list.

[Egil]

Difference is about a gallon. The 77/78 tanks hold more.

F-model 17,5lit(4,8U.S gal)
K7-model 19,5 lit(5.1 U.S gal.4,3 Imp.gal)

This is what the website tech spec sections list.

This are the specific collected from the Original HONDA CB750 service book for the CB750F2/K7 

[eldar]

well there is a list for fuel capacity and reserve capacity.

If the capacity is overall, then it is 5 but I was under the impression the reserve was listed separate at 1.1 gallons.
I could be wrong

[754]

Well what is the most you ever put in yours?

I should be asking 1080,
we both rolled into Wendover on fumes..LOL..

[Joel]

I was under the impression that the main capacity included the reserve.  For instance, the 4.5 gallon tank would hit reserve after using 3.2 gallons.

[eldar]

Well main could not include reserve as reserve is not available when switched to main. Well thats what logic would dictate!

Anyways, I am pretty sure my bike holds over 5 gallons but I cant check for sure until it warms up here and I can ride. Pretty sure I have filled over 5 in the past and I do not go to reserve until after 4 gallons are used.