Topic: 76 750k project "back to life"

[Benny]

Allright, so i purchased a 76 cb750, it was in fairly good shape but i decided i wanted to turn it into a project bike, first thought was cafe but now i am thinking of bobbin it. It seems that i have come to the right place to get some of my questions asked so here i go, any answers or feedback would be greatly appreciated.


1. I have a Clymer manual for my bike but i need a more specific assembly manual for the engine

2. Does anyone know if there are aftermarket softail rear ends availiable for a 76 ( something that i can get a wider wheel and tire in)?

3. what do i need if i want to turn convert my engine to a 2 carb setup, i know i need a manifold (are they availiable and where if so) and what size carbs should i use?

4. what steps should i take to prep the engine for paint?

[Benny]

Well, i posted the above questions about a week ago but still have not recieved any answers, so i am going to start my project thread, I bought this 76 750 for $600 bucks, it was in pretty good shape as you can see from the first picture. The only problem with the bike when i got it was that it wanted to jump into gear when idling so since i had to get to the tranny i figured why not rebuild the engine since i am going to have it apart so i decided i will do an 836cc kit cam and some other performance goodies. I found an inspiration picture and dont kill me for it i know it is an evo twin but i really like the look of the bike. Also i posted some pictures of the problem in the tranny below, as you can see the cogs on 1st gear are rounded, i am not sure how that happens but i found a replacement tranny so that is fixed and also i had a local small engine guy who in his prime used to race 750 hondas do a valve job on my head which i believe looks pretty good.

[Johnny5]

That red CB750 is yours? Please tell me you're not going to cafe that bike!! Man, it's in great shape.

[DollarBill]

Ooh...I hate to see that one torn up too...there are plenty of old crappers to be cafed.  However, it is yours so do what you want with it.

I can't think of ever seeing any soft tail fenders made for a sohc but you could probably make one fit.  How wide of a tire do you want to go?  You can't get too wide without some modifications to either the frame, swingarm, or using offset sprockets.  I think a 140 might be the widest you can go without a lot of mods. 

There is a member here that uses a two carb setup and I think you can get the kits from cyclex
This link will help you a lot: http://forums.sohc4.net/index.php?topic=743.0
This link will help you with your engine: http://forums.sohc4.net/index.php?topic=369.0
This link will help you with manuals: http://forums.sohc4.net/index.php?topic=426.0

Good luck and welcome aboard!

[Benny]

Thanks, for the reply those links are going to be very usefull, as far as which size rear tire i am lookin to go 180 to 200 i just need to find a newer sportbike swingarm that will fit inbetween the frame.

[Alan F.]

as far as which size rear tire i am lookin to go 180 to 200 i just need to find a newer sportbike swingarm that will fit inbetween the frame.

Lots of members can give technical explanations of why handling will suffer with a wider rear tire. That's pretty wide for one of these bikes, I've heard of a 150 fitting though.  But if you're going to a hardtail, add a jackshaft and go as wide as you please.   Be sure to post pics when you have it built.

[Benny]

so here is a picture of the frame, yes it is just a plain jane stock frame



Has anyone tried to fit a Harley Davidson softail swingarm to one of these frames? i know with that i would be able to fit a 180  tire into the swingarm, i was just wondering if maybe ther are any other swingarms as well that people have fit in the stock frame that will take a 180 tire.

Thanks

[rachet]

Can't really help you with the swing arm questions, but I'm looking forward to your build.  You may need to machine up a new Swing arm (or have a shop do it) to meet your needs.

Good Luck!

Rach-

[Benny]

Well after losing interest and then getting back on the band wagon i decided that i was going to have a frame built. So i confided in Kate at Cycle One Manufacturing in OK and i am glad that i did, they were all a pleasure to work with always making sure i was going to get what i wanted. I would highly reccomend them to anyone thinking of building a frame.

So back to speed. I just recieved my frame via UPS today so like a kid on Christmas morning i had to put it all together for the first mock up.

http://picasaweb.google.com/lh/photo/egGFUYy1YzljA1FEyePYVRgszMYzXmse5lQIkeRKocQ?feat=directlink

http://picasaweb.google.com/lh/photo/cMcYMWiu3EAiswMFt2HpARgszMYzXmse5lQIkeRKocQ?feat=directlink

As you can see the frame turned out very well. I have just sent out the triple tree to have a 1 inch stem put in it and will be posting more pics soon.

[traveler]

PM sent

[KB02]

Well after losing interest and then getting back on the band wagon i decided that i was going to have a frame built. So i confided in Kate at Cycle One Manufacturing in OK and i am glad that i did, they were all a pleasure to work with always making sure i was going to get what i wanted. I would highly reccomend them to anyone thinking of building a frame.

So back to speed. I just recieved my frame via UPS today so like a kid on Christmas morning i had to put it all together for the first mock up.


http://picasaweb.google.com/lh/photo/egGFUYy1YzljA1FEyePYVRgszMYzXmse5lQIkeRKocQ?feat=directlink

http://picasaweb.google.com/lh/photo/cMcYMWiu3EAiswMFt2HpARgszMYzXmse5lQIkeRKocQ?feat=directlink

As you can see the frame turned out very well. I have just sent out the triple tree to have a 1 inch stem put in it and will be posting more pics soon.

Sweet.

I am of two camps -
1 - Don't cut up a really nice classic.
2 - It's your bike, do what you want with it.

I think you have pleased both camps as far as I am concerned.

That frame is sweet. I'll be watching to see this ride come together.

[traveler]

PM sent

[Benny]

This thing is low and lean. Here is a picture so you can see just how low and aggressive the stance is on this thing.


http://picasaweb.google.com/lh/photo/qydqIF9UVfrYnYN1QiqbOhgszMYzXmse5lQIkeRKocQ?feat=directlink