Author Topic: 1975 CB750 Build! "Kona" - Sold and gone. (Read 71450 times)

Ravie · « **Reply #225 on:** March 05, 2015, 05:36:55 AM »

I actually already did that. haha. Looks like in the pic above I've just got the starter wire there, but I did later get the stator and oil pressure sensor hooked up.

Ravie · « **Reply #226 on:** March 06, 2015, 05:31:04 PM »

Gringo S!

Ravie · « **Reply #227 on:** March 06, 2015, 05:38:51 PM »

Is this the tool I need for shocks and steering nut?

http://www.ebay.com/itm/HONDA-CM400-CB400-CM450-GL500-CX500-CB550-CB650-CB750-CB900F-SPANNER-PIN-WRENCH-/171554967590?pt=Motorcycles_Parts_Accessories&hash=item27f1791026&vxp=mtr

scunny · « **Reply #228 on:** March 06, 2015, 10:36:25 PM »

yep, that's the wee beastie, a C spanner

Ravie · « **Reply #229 on:** March 09, 2015, 08:06:29 AM »

So, this happened... only took 5 bloody tries.

Also got the forks on. Had to make my own D washers for the top of the triple tree. They look horrible in the picture. It is just the lighting.

Ravie · « **Reply #230 on:** March 09, 2015, 01:08:19 PM »

So, what's the deal with there being no seal at the stator side of the crankshaft?

martin99 · « **Reply #231 on:** March 09, 2015, 01:44:25 PM »

Not sure of the 'why', but it's normal for a 750 to have oil behind the stator cover, there are usually a few drips when the cover is removed.

Ravie · « **Reply #232 on:** March 09, 2015, 02:06:41 PM »

It creeped me out..I was like, i know I didnt take one out, and there isnt one in the kit, so im pretty sure there isnt one.

Just seems strange. But it is what it is! Haha

edwardmorris · « **Reply #233 on:** March 09, 2015, 02:26:54 PM »

There is a seal on the stator side, listed under the starter motor of the parts fiche

OIL SEAL (25X33X4)
91215-300-003

Ravie · « **Reply #234 on:** March 09, 2015, 02:32:47 PM »

Where would it go?

Ravie · « **Reply #235 on:** March 11, 2015, 01:29:28 PM »

Been getting more done. Got the rear wheel apart today. Soaked and scrubbed the hub pieces at home, then brought them to the car wash, then back home and put them in the sink with boiling soapy water. Some of that junk is stubborn. Ill press in the bearings and lace it up tonight.

I got the flanged bushings into the swingarm, got the longbolt clean and cleared of old junky grease. Collar is cleaned and greased and installed in the bushings.

Got my new female spade connectors grom vintage electronics today so I can finish installing the new fuse box connectors.

Im bummed, the seat i bought on ebay requires the rear hoop to be cut and one of those u shaped hoops to be welded in its place. I may resell it on ebay unless someone on the forum is interested.

I have seen several times guys on the forum with these nice looking slope back seats that retain the stock fender hoop. Can anyone tell me where to find one?

In the meantime i have a pan and foam that I could recover with something cheap I buy at the fabric store to get me by. Ergh.

I've been told my head is on the bench next, so I'm pumped for that.

I picked up some GN4 Pro Honda 10w40 to break in with. I toyed with weight for a long time. I'll switch to 20w50 later after I break it in.

So much yet to do!

I still have to get some good drill bits and drill my frame kit pieces. Wish my drill press wasn't out of commission!

edwardmorris · « **Reply #236 on:** March 11, 2015, 01:49:15 PM »

Quote from: Ravie on March 09, 2015, 02:32:47 PM

Where would it go?

Sorry I missed this, item 17 here

http://www.cmsnl.com/honda-cb750-four-k4-usa_model482/partslist/E++11.html#results

Ravie · « **Reply #237 on:** March 11, 2015, 02:41:49 PM »

Ah. Cool.

Ravie · « **Reply #238 on:** March 11, 2015, 07:31:42 PM »

I guess my next question is, I HAVE this seal. Is it relatively easy to remove the stator rotor and flywheel to replace this with everything together? Or do I need a puller for that? If not i may leave the original in there...

Ravie · « **Reply #239 on:** March 11, 2015, 08:28:50 PM »

Found the seat I was talking about earlier. http://www.ebay.com/itm/301343977911?_trksid=p2060778.m1438.l2649&ssPageName=STRK%3AMEBIDX%3AIT Hope I can find one again when I've got the dough to spend. Saving all of my scruples to pay HondaMan when he's done with my head. lol This is the style I REALLY want though.

Here's a sort of similar one that says it can be adapted to CB750. Not sure what it involves though. I'd have to ask them.
http://www.ebay.com/itm/191449635853?_trksid=p2060778.m1438.l2649&ssPageName=STRK%3AMEBIDX%3AIT

Now I have the dilemma of trying to figure out what to do with the seat I already bought from Hong Kong, since they don't accept returns and I don't want to try shipping that thing back anyway. Ergh. Sucks. Sucks. Sucks. Sucks.

Ravie · « **Reply #240 on:** March 11, 2015, 08:36:58 PM »

Hmm, found another option. http://www.dimecitycycles.com/review/product/list/id/3071/category/19/

edwardmorris · « **Reply #241 on:** March 11, 2015, 08:56:51 PM »

Quote from: Ravie on March 11, 2015, 07:31:42 PM

I guess my next question is, I HAVE this seal. Is it relatively easy to remove the stator rotor and flywheel to replace this with everything together? Or do I need a puller for that? If not i may leave the original in there...

You'll need a puller, Gordon/ilbikes had a small batch made, may still have one left. If you want to leave the old one in, it MIGHT be ok?? The stator can be removed while the engine is in frame, so, if it really comes down to needing that seal replaced it can be done.

Ravie · « **Reply #242 on:** March 12, 2015, 08:09:29 PM »

Piddling around in the garage tonight... got the new kml bearings and seals installed in the rear hub. Found an oring to work on the chain hub side..wasnt big enough really but stretched out ok enough. Still stuck out enough for a solid grab.

Painted the rear sprocket guard thing. Not huge, but its all part of the process!

Ravie · « **Reply #243 on:** March 15, 2015, 06:59:57 PM »

Started out the day by baking some parts and then mounting my Ricks Reg/Rec to the bottom of the battery box. Used some machine screws and then you can sort of see I sandwiched an o-ring between two washers underneath the unit as a standoff. Plenty o' air!

Not sure if I posted a pic of the front wheel all laced up. It was my first time ever lacing a wheel. It took two YT vids, Having an assembled wheel to look at AND 5 tries to get it laced correctly. Ugh.

This evening I laced up the rear wheel. With the help of the old indents it took me one try and about 15 minutes total. Much better.

Got the "frame kit" I did all finished up as well. Took me two 1/4" Cobalt drill bits, a bunch of honing oil, some Rustoleum and my oven...haha. Got it all done though.

On my swingarm... I'm interested to see how everything pans out. I think that the flanges on the bushings I got from Frank in Germany are too wide. They measure just at or just under 2mm which Mark said would likely work...but when I put my collar up in place I can see that the collar does not stick out whatsoever. It's even, if not just a bit undersize as compared with the bushings. I'm thinking what I might to is get out a flat file and take a bit off of each side. Can anybody give me any reason why that wouldn't be successful so long as I'm careful?

I have nearly everything I need to get this bike done at this point except time. I still need to torque and true the spokes, get an invoice from Mark when he's done (I'm scared for that invoice. I won't lie.) and get the head back..

Oh! And I almost forgot...I've done nearly everything I can think of to get the piston out of the caliper. Help. Please.

That's it for now!

Ravie · « **Reply #244 on:** March 15, 2015, 07:57:18 PM »

Brake line input? How do i accomplish the actual connection?

For sure. I'm no hammy hands! haha

Ravie · « **Reply #245 on:** March 17, 2015, 06:25:02 PM »

Interesting issue i ran into witht the cruisin image pistons..the piston pins were not fitting into the bores. I had to make my own bore brushes from some red scotchbrite for my dremel and run them through the wrist pin bores as well as the edges of the pins themselves to remove burrs that wee stopping each and every wrist pin from fitting. I eventually got them all clean but for others...watch out for this!

Restoration Fan · « **Reply #246 on:** March 17, 2015, 07:09:02 PM »

Bill Benton got my brake piston out by just using the brake lever and the master cylinder. Seems like the simplest way to me.

Just be sure to:
a. do it over a towel because the brake fluid's going to come out after the piston comes out
b. keep refilling the brake fluid during the process so that you don't get air in the lines

Ravie · « **Reply #247 on:** March 17, 2015, 08:29:21 PM »

More progress this evening:

1. Cut out Scotchbrite circles and cleaned piston wrist-pin bores. All are fitting now.

2. Used a grease gun to remove the piston from the caliper. Way too easy. Cleaned it all up, including the bleeder screw that has been sitting on my bench unlost since last August.... Used some 2000 wet on the piston and piston bore, installed a new seal wetted with brake fluid and shoved the piston back in. Good as new. The paint on the caliper is ugly...I really don't care. Just one more expense otherwise and it will be perfectly functional.

3. I actually started this yesterday but... I mounted the swingarm to my bench and put the rear wheel on it. I'm trying to true it myself. So far I'm not very good at it BUT I have no indicator mounted to it...so sometime in the next few days I'll work on getting some sort of pointed set up to check it with. The rear rim on this bike has seen better days.

4. Finished installing the new connectors which I purchased from Vintage Connections on my main wiring harness. I put a new set of male/female connectors on the fuse box and had to destroy a few things to get the old crust junk apart. All is well now.

5. My frame "kit" is done. Went through 2 $7.49 Cobalt bits drilling the (

1/4" holes necessary for the collar bolts, but I got it done.

Spoke with Mr. Hondaman about what is going to happen with the head for this. Biggest news is that it's getting new valve guides. I wouldn't have done that but my exhausts were apparently quite enlarged. No bueno. Gotta do it right.

Now to rob a bank! lol!

martin99 · « **Reply #248 on:** March 17, 2015, 11:54:57 PM »

Great stuff Ravie, looks like you're all over it like a rash!

Regarding the seat conundrum, back in the day we used to replace the stock ones with cafe types all the time. Common brands were Giuliari and Two-Four (might even have been the same company, not sure). These often still come up, used and NOS. Might help widen your search.

Ravie · « **Reply #249 on:** March 18, 2015, 12:55:16 PM »

Yeah, I've managed to find some here and there. WAY out of my price range right now but will keep those ones in mind.

I put the seat I bought on eBay. So disappointed it didn't work out. Now I've got head work to pay for that wasn't in my budget. Trying to scramble some $$ to make sure I can cover it!

Got the caliper cleaned up and finished today. Had to sand the SBS pad to fit, and I had to run to the store and get a set screw for the pad that slides in the caliper. Other than that no big issues. With a rebuilt M/C, rebuilt Caliper with ceramic pads, new hoses, and my freshly ground and drilled rotor...I should have some pretty decent brakes!

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Author Topic: 1975 CB750 Build! "Kona" - Sold and gone. (Read 71450 times)