Topic: 1975 CB750F Cinder Cone

[wannabridin]

white is the easiest color to keep clean, that's why it and silver are the top two colors on cars.  if it were black it'd show EVERYTHING!

[CBcafeJunkie]

white is the easiest color to keep clean, that's why it and silver are the top two colors on cars.  if it were black it'd show EVERYTHING!

Hummm.... that's cool guess I thought the engine grease would show up easily.

[CBcafeJunkie]

So its been a while since my last post. I got the bracket but found it was not right for a supersport so i will be using a stock bracket but will also be sending "The Architect" measurements for a 750f gauge bracket.

ANYBODY got a tip for getting the stupid allen bolt out of the bottom of the fork lowers???!!!!! Ive soaked them in pb but no luck thinking dill em out but really dont want to.

[traveler]

white huh?  Well, you're gonna get real good at wiping chain lube off of it!

As far as the fork bolt....now that the sliders are painted....you will have to drill them out.  if unpainted, you could use heat.  Now....you're option is drill, tap, replace.

~joe

[tweakin]

That gold looks even better in person.  I will look through my extra parts this weekend and see what I can put together for your build.

[lofton05]

To get the allen bolt out you need to have pressure on the inside or else the bolt will just spin.   Find a small broom stick handle or buy a wooden dowel rod and slide it down in the lower forks while you turn the allen bolt.  You need to put alot of pressure on the wood so the bolt wont spin freely.  It aint easy to do but it works.  

[geniusanthony]

I like what you have goin on with your scoot. I used to live and work at lewis, now I am by DC. best of luck and how'd that 72 motor turn out?

[tweakin]

Sent you a PM regarding the parts I have for you.  If you want them I will be around today most of the day.

[CBcafeJunkie]

I like what you have goin on with your scoot. I used to live and work at lewis, now I am by DC. best of luck and how'd that 72 motor turn out?

Haven't gotten to start it up yet. Just rotate it frequently till I can get it shined and painted

[CBcafeJunkie]

So im a little pissed tried to get the discs holding the rear wheel bearings out and did successfully but then accidentally marred the threads..... then on the otherside  my drill bit broke off in the bearing cover!!!!!!! So if any suggestions im open. I really like the rear disc setup and i am still looking for a rear hub with that configuration if anyone has or knows someone with an extra.

[Jerry Rxman Griffin aka MuthaF'er]

Are you referring to the wheel bearing retainers that thread in once you have the bearings installed? How bad are the threads? If you can clean up the threads enough to screw the new ones in you should be fine. I made a removal tool with a piece of flat aluminum bar from Home Depot, drilled 2 holes into it the distance of the holes in the retainer, and installed 2 small bolts and nutted them down to the aluminum bar with the ends of the nut sticking out, inserted into the retainer (after drilling out the spiking Honda did), and unscrewed them. Sure will make reinstall of the new retainers much nicer.

What do you mean by the bearing cover on the other side? I'm looking at the diagram on motogrid.com

I'll keep an eye out for the hub. Do you need any of the other parts too? I've been EBaying nightly for 4 years!   

[CBcafeJunkie]

Are you referring to the wheel bearing retainers that thread in once you have the bearings installed? How bad are the threads? If you can clean up the threads enough to screw the new ones in you should be fine. I made a removal tool with a piece of flat aluminum bar from Home Depot, drilled 2 holes into it the distance of the holes in the retainer, and installed 2 small bolts and nutted them down to the aluminum bar with the ends of the nut sticking out, inserted into the retainer (after drilling out the spiking Honda did), and unscrewed them. Sure will make reinstall of the new retainers much nicer.

What do you mean by the bearing cover on the other side? I'm looking at the diagram on motogrid.com

I'll keep an eye out for the hub. Do you need any of the other parts too? I've been EBaying nightly for 4 years!   

So we got the retainer out. I actually made the same tool about a week ago. Think im taking the hub to a machine shop for tapping and should be all good!!! Not a good feeling these are kinda rare with discs.

[CBcafeJunkie]

So did a little work today, tied to put my forks back together but had a problem. I think i marred the metal trying to get the old seals out and when i put the lowers on they didnt compress right, they kinda stuck and one wouldnt even go on all the way  any suggestions. Am i screwed? Do i need to replace them, or is honing gonna do it?

Also was able to install my swing arm and tapered steering bearings. Now i just gotta grease pack em and throw the triple trees back on.

My rear hub is kind of a mess. I marred some of the threads where the bearing retainer fits so hoping i don't have to wait to find a new one and can just have it machined. The marred threads are all at the top so dont think it will be a problem.

[articblue]

Keeping my eye on this, looking good so far.

[CBcafeJunkie]

I took my hub to the machine shop but they said they didnt have a tap big enough......So i go on ebay and found just the sprocket assembly and got that for $40 shipped. This is a huge reminder to be more carefull. Thanks all for the support too.

Also Im finishing up polishing my valve cover then should be able to paint motor and install. im thinking about the same color the architect used but toying with a red fading to black.

[articblue]

Actually a neat trick to those big threaded things such as the hub.

Depending on how badly marred up it is, and what metal we're talking about, you can take a smaller diameter tap, with the same thread pitch and run it on the circumference of the threading.
I did this on the front hub on my 76' 750F after the honda shop screwed it up.

There's a post on here I got the cool little trick from but I don't remember where.

[CBcafeJunkie]

I like what you have goin on with your scoot. I used to live and work at lewis, now I am by DC. best of luck and how'd that 72 motor turn out?

Don't think I ever answered you regarding the motor. I have been poloishing the valve cover gasket and will reinstall as soon as I'm done with that. Hope it all meshes together

[CBcafeJunkie]

We put the Temporary engine in!!!!!! Its a 72 engine that will stay in until the F engine is rebuilt. Now im waiting for the rear hub and then ill powder the hubs and rims brass and get it all back together. Right now i'm going to sand out the fork lowers and install the rest of the front end I need to find the rest of my engine mounting bolts

[tweakin]

We put the Temporary engine in!!!!!! Its a 72 engine that will stay in until the F engine is rebuilt. Now im waiting for the rear hub and then ill powder the hubs and rims brass and get it all back together. Right now i'm going to sand out the fork lowers and install the rest of the front end I need to find the rest of my engine mounting bolts

Man that looks great with the white frame and red tank and swing arm.  I got your voicemail but no pic came across my phone.  I got my 750 up and running, just need to work out the seat and license plate location.

Tige

[KB02]

Yeah, it's looking good, Junkie.

[CBcafeJunkie]

Yeah, it's looking good, Junkie.

Thanks man. Trying to really take it easy and think this through but there are so many things id like to do i just cant afford it all. You wouldnt happen to know how to tell F0 pistons from k pistons would ya?

[CBcafeJunkie]

So i just renamed the subject in hopes of getting some interesting feedback for a name for this red beast....humm that might be a good name but lets hear what you all come up with

Came home from work and honed out my fork lowers so that they will slide smoothly on the forks again. Then passed out in the chair in the garage.

[CBcafeJunkie]

I have decided that i dont post enough pics and will be trying to do this with more detail. However this morning before i came to this resalution i was able to FiX my rear hub threads!!!!! i also orderd another one but ill use that on the next bike.

[Jerry Rxman Griffin aka MuthaF'er]

Yeah, it's looking good, Junkie.

Thanks man. Trying to really take it easy and think this through but there are so many things id like to do i just cant afford it all. You wouldnt happen to know how to tell F0 pistons from k pistons would ya?

Not the easiest thing to do if you don't know the little details. First look near the pins for either 300 or 392. Now it gets a little more difficult. 392 pistons are 75/76 F AND/or 77/78 K. 300 are earlier K. Late in 75 the 392 F pistons changed from -300 rings to -392 rings. What is your engine serial number? I'll check that for you. Also there are 2 different domes on 392 pistons. My early 75 has full domes but my 78 K engine with 392 pistons had domes like earlier 300 pistons. The earlier 392 piston has 1.4mm oil rings and 2.8mm compression rings. This is one of the differences. Later 392 pistons had thinner rings.

Both of these are 392 pistons. The full dome came from my early 750F

[CBcafeJunkie]

Yeah, it's looking good, Junkie.

Thanks man. Trying to really take it easy and think this through but there are so many things id like to do i just cant afford it all. You wouldnt happen to know how to tell F0 pistons from k pistons would ya?

Not the easiest thing to do if you don't know the little details. First look near the pins for either 300 or 392. Now it gets a little more difficult. 392 pistons are 75/76 F AND/or 77/78 K. 300 are earlier K. Late in 75 the 392 F pistons changed from -300 rings to -392 rings. What is your engine serial number? I'll check that for you. Also there are 2 different domes on 392 pistons. My early 75 has full domes but my 78 K engine with 392 pistons had domes like earlier 300 pistons. The earlier 392 piston has 1.4mm oil rings and 2.8mm compression rings. This is one of the differences. Later 392 pistons had thinner rings.

Both of these are 392 pistons. The full dome came from my early 750F

the full dome does not look familiar so i dont think i have any of those. Also my dumb a** thought i could remember everything on the front end, any one know what goes on the underside of the gauge mounting bracket for the 750F i need to take more pics next time.

Here's some pics of the forks installed!!