Topic: Just another 71 CB750 K1 (After over a year, I finally got some 4 into 4 pipes!)

[iron_worker]

Those rims for the KZ1000 are the same for the 750?

IW

[mwvachon]

Yeah, Kz1000 and Z900 have the same rim. I did some research and contacted them. You need to make sure both size AND spoke count are correct if you cross match to anything other than the Honda OEM part. If you are in doubt, contact them - I found they were excellent to work with and suggested they create a part listing for the CB750 as well. They are looking into it.

[edhaeuser]

DO NOT !!!I repeat DO NOT !! make a list. The main reason is if the wife finds it and the related receipts is grounds for divorce in most States...........Gary

Yeah Gary,  I have to be careful with that!!!!


Dream750 and M.W. Vachon.....

Thanks for the supplier tips!!

Ed

[edhaeuser]

I have another question.  Should I powder the front brake calipers and front master cylinder semi-gloss or satin?  when I was looking at them before I cleaned them up I would have thought satin would be closest to original.  But, after cleaning the grime off I am not so sure.  Personally, I think I would like satin over semi-gloss, but I also want to stay close to original.

[edhaeuser]

I did manage to get a few more things dismantled.

I removed the swingarm bushings with my blind bearing remover after all.  Instead of using the slide hammer part of the tool, I ran a pipe through the swingarm and hammered it out from the other side.  It worked great!



Crusty front brake master cylinder



My front caliper was stuck.  I went to three different places today trying to find a 10 1.25 thread grease zirk and nobody had one.......So, I drilled a hole through a 10-1.25 bolt and then tapped it to accept a 1/4 by 28 grease zirk.  then I cut the bolt off and came up with this.



I screwed it into the caliper, and pumped the piston right out



Caliper parts bead blasted and waiting for powder coating

[Stev-o]

I vote for satin powder on the caliper. Nice job blasting.

[Garystratos201]

My vote is for satin powder also.....Gary

[Dream750]

Personally, I would refinish the brake caliper and master cylinder with the same powder coating that you used on the tool tray and battery box. (photo below)  The master cylinder was originally anodized, but should look nearly original with the powder coating.

For side covers, I would suggest these high quality reproductions:

http://forums.sohc4.net/index.php?topic=74022.msg822417#msg822417 

Side cover painting tip:  http://forums.sohc4.net/index.php?topic=78158.0

[edhaeuser]

Personally, I would refinish the brake caliper and master cylinder with the same powder coating that you used on the tool tray and battery box. (photo below)  The master cylinder was originally anodized, but should look nearly original with the powder coating.

For side covers, I would suggest these high quality reproductions:

http://forums.sohc4.net/index.php?topic=74022.msg822417#msg822417 

Side cover painting tip:  http://forums.sohc4.net/index.php?topic=78158.0

Those covers look nice.  And, thanks for the painting tip.  I did not know they did it that way from the factory.

 Ed

[edhaeuser]

Small steps forward.  The caliper and master cylinder are powder coated.  I ended up using semi-gloss for everything......basically because I'm lazy and did not feel like changing powders between parts.  I think that it looks about right for the master cylinder but maybe a bit shiny for the caliper.

[iron_worker]

I think they both look great!

IW

[cheftuskey121]

Very nice looking Ed! I have the day off so I'm about to be out in the garage all day tearing apart the rear wheel and maybe start cleaning the engine

[Dream750]

Nice job on the master cylinder and brake caliper, looks factory fresh. 

[edhaeuser]

Very nice looking Ed! I have the day off so I'm about to be out in the garage all day tearing apart the rear wheel and maybe start cleaning the engine

Good!  Document well so I have good tips!!!

[cheftuskey121]

Very nice looking Ed! I have the day off so I'm about to be out in the garage all day tearing apart the rear wheel and maybe start cleaning the engine

Good!  Document well so I have good tips!!!

working on an update now, I am terrible with updates :-p

[edhaeuser]

I finally got a very stubborn fork seal retainer clip out last night after days of soaking with penetrating oil.  This morning I disassembled and cleaned the forks.  I soda blasted the lowers and then started sanding the corrosion out of the aluminum.  I used 400 grit first and then 800 grit.  A lot of people then use 1000 to 1500 grit paper.  For some reason, I find that when I go super fine with the paper, the first buffing compound is actually coarser than the paper.  After the sanding I used Red Tripoli, Black Emery, and finally White Rouge.  I still have to hit it with 3M finesse it finishing compound.  They actually look better in person than in the photo.

I should have taken a before picture.

[Garystratos201]

Nice work polishing the forks. I always go to 1000 grit wet sandpaper it seems easier to buff out the 800 grit scratches.........Gary

[edhaeuser]

Nice work polishing the forks. I always go to 1000 grit wet sandpaper it seems easier to buff out the 800 grit scratches.........Gary

Gary, you are quite right, I did have to go over it twice with the Tripoli.  I think that I was tired of sanding by the time I finished the 800 :-)

[iron_worker]

Wow. I'm diggin the forks.

IW

[cheftuskey121]

nice forks! see I want mine to look like that but I do enough sanding from guitar building. I hate it. I'm leaning towards my 'nu cast' paint for ease and touchups. sigh.

[mwvachon]

I have a better suggestion for reproduction side covers:
http://www.z1parts.net/product/honda-cb750-1972-76-side-covers-set

I've bought from both and the z1parts units are much better than those others. The other mfg has poor casting in the emblem area (need to dremel out all the uneven surfaces in the emblem recess). Those parts also came with some kind of release film all over them and would require a finish sanding prior to paint. My two Lincolns...

[edhaeuser]

I have a better suggestion for reproduction side covers:
http://www.z1parts.net/product/honda-cb750-1972-76-side-covers-set

I've bought from both and the z1parts units are much better than those others. The other mfg has poor casting in the emblem area (need to dremel out all the uneven surfaces in the emblem recess). Those parts also came with some kind of release film all over them and would require a finish sanding prior to paint. My two Lincolns...

Good to know.  Thanks!!!!!

nice forks! see I want mine to look like that but I do enough sanding from guitar building. I hate it. I'm leaning towards my 'nu cast' paint for ease and touchups. sigh.

Ha!  I was sick of sanding with just the forks!

[stuartni]

very nice build and some nice bikes there wish there was bigger classic bike here its so hard to find any parts i really want a carpy type exhaust for my 550 just cant get anything like it over here

[Dream750]

I have a better suggestion for reproduction side covers:
http://www.z1parts.net/product/honda-cb750-1972-76-side-covers-set

I've bought from both and the z1parts units are much better than those others. The other mfg has poor casting in the emblem area (need to dremel out all the uneven surfaces in the emblem recess). Those parts also came with some kind of release film all over them and would require a finish sanding prior to paint. My two Lincolns...

I never knew about the Z1 Parts side covers as it’s always good to have options in the aftermarket. My first set of: http://www.fb-stuff.com/ 1971-76 750K side covers was purchased in 2010 and I didn’t have any problems with them, then or now. Here’s some more aftermarket covers, but I don’t have any first hand experience using these: 

Maier:  http://maier-mfg.com/catalog/honda-cb750k-side-panels

LPM: http://lpmreplicaparts.com/honda/CB750K1/sidep.html

David Silver: 

http://www.davidsilverspares.co.uk/CB750K1-FOUR-1971/pattern-parts/part_104760/

http://www.davidsilverspares.co.uk/CB750K1-FOUR-1971/pattern-parts/part_104761/

[edhaeuser]

A long tedious day of degreasing and cataloging all the nuts, bolts, washers, and misc. pieces for zinc plating.  everything is broken down by sub system, such as engine mounts, center and side stand,  brake master cylinder, etc. etc.  I measured all lengths and diameters of every bolt, washer (inside and outside for washers), and nut. I have 12 pages so far.  Hopefully this will make it easy to separate and organize everything when I get it back.



I also discovered I need to add a new swing arm spindle to my wish list.  It is really worn and scored.



Oh,  a couple more shiny bits.  This was my experiment with Duplicolor 1615 and clear coat.....baked afterwards.  It seems pretty tough.