Author Topic: CB 750 Project 1 - Rides Well but a few tweaks needed (Read 114198 times)

Terry in Australia · « **Reply #275 on:** July 13, 2015, 04:27:23 AM »

Geez, that's some amazing damage Tim, unreal! Let me know if you want to sell that K0 hub, I'll need one eventually. Cheers, Terry.

timbo750 · « **Reply #276 on:** July 13, 2015, 01:18:10 PM »

Terry, I will hold onto it for you just let me know when you need it.

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timbo750 · « **Reply #277 on:** July 17, 2015, 06:55:05 PM »

Parts arrived this week from several places, as though the planets were aligned. I got the gauge faces from Marcel, spokes from DCC, a new spoke wrench from a local ebay seller and engine seals from yamiya.

All I need now is some time for myself and some warmer weather. It has been so cold here in the evenings that I would not even go out to shed to contemplate what needs doing. My son has his last footy game tomorrow for the season so Sunday mornings will be mine again for a while and hopefully progress will start again.

I have made three attempts at repaying the gauge bezel's and the paint is going on nice and evenly but its so cold the paint is being affected.

Retro Rocket · « **Reply #278 on:** July 17, 2015, 08:07:44 PM »

I've used a fan forced heater and a hair dryer to heat up parts to be sprayed in winter with great success, even painted a whole 900 Boldor engine that way...

Terry in Australia · « **Reply #279 on:** July 17, 2015, 11:58:44 PM »

What paint are you using Timbo? It's way too cold for acrylic laquer (although it was nice out in the patio today with the sun shining for a change) but enamel is usually pretty usable regardless of temps.

I've got an old vertical clothes dryer (remember them? It cost me a slab 20 years ago, and it was probably 20 years old then) and a large fan forced industrial oven in my garage that I pulled out of a skip, so I can warm things up, spray them, then put the painted items somewhere with even warmth all around the part. (or heat in the case of engine enamel that needs to be baked on)

You can try some "Rustoleum" paint from Bunnings too Timbo, I painted the S&W shocks on a cold day but didn't need to fire up the dryers, it went on well and there was no humidity blushing. Cheers, Terry.

timbo750 · « **Reply #280 on:** July 23, 2015, 10:30:00 PM »

Had a small win this week, haven't had too many on this build so I will take what I can get. I was looking through some stuff at the back of a shelf at work and found an old headlight insert still new in the box for an old truck that we longer have and the measurement on the box was 178mm so I was hoping it would fit.

Took it home and had some luck and it was a perfect fit, the globe that came with it most likely is not suitable as its a 100/70 which I think is too much current draw for these machines.

knottedknickers · « **Reply #281 on:** July 24, 2015, 07:15:07 AM »

Quote from: timbo750 on July 23, 2015, 10:30:00 PM

Had a small win this week, haven't had too many on this build so I will take what I can get. I was looking through some stuff at the back of a shelf at work and found an old headlight insert still new in the box for an old truck that we longer have and the measurement on the box was 178mm so I was hoping it would fit.

Took it home and had some luck and it was a perfect fit, the globe that came with it most likely is not suitable as its a 100/70 which I think is too much current draw for these machines.

Nice find! Those kinds of things are important from time to time--you start to get discouraged without them... As for the globe, it looks of the removable type, so you should be able to find a LED (low draw) or an H4 (with lower draw) to fit.

My 'luck' on the headlight front has been a bit different... I was looking for a headlight basket at a wrecker in a different city (mine has a crack or two). I was pawing through a box at the back of the shop and all I came up with was one for a CM400. It looked like it might work, but I didn't have measurements or anything else to go on (by the way, thanks for the 178 mm--that will help!) I bought it, but my headlight doesn't fit (stock headlight too large / basket too small)... So either I need to find a headlight that will fit the CM400 basket or, well, the options are endless; but one thing is for sure--I'll be spending more money!

timbo750 · « **Reply #282 on:** July 24, 2015, 02:48:29 PM »

I had issues with the first basket I had. I did one of those stupid things that later on you say to yourself what the hell were you thinking.

I was attempting my first colour on the fenders and thought the bucket should be the same colour, I put it in the oven to cure and put it out of shape. Ended up getting another repo unit and left it in the black plastic.

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knottedknickers · « **Reply #283 on:** July 24, 2015, 03:27:08 PM »

Quote from: timbo750 on July 24, 2015, 02:48:29 PM

I had issues with the first basket I had. I did one of those stupid things that later on you say to yourself what the hell were you thinking.

I was attempting my first colour on the fenders and thought the bucket should be the same colour, I put it in the oven to cure and put it out of shape. Ended up getting another repo unit and left it in the black plastic.

You deserve to find two headlights for that!

timbo750 · « **Reply #284 on:** July 25, 2015, 12:48:22 AM »

Actually there is another lenses. Might grab that for the next build.

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timbo750 · « **Reply #285 on:** July 28, 2015, 10:22:45 PM »

Quick update. Have nearly got all the repair work on the case, just have to get a thread chaser.

Also still cleaning up the front hub, I hate polishing and those grooves in the middle are a pain in the arse.

oldhatt45 · « **Reply #286 on:** July 29, 2015, 05:31:20 AM »

timbo750,

Check this thread out. Wish I had seen it when I was doing my hub.

http://forums.sohc4.net/index.php/topic,58276.msg631146.html#msg631146

Hope this helps,

Charlie

timbo750 · « **Reply #287 on:** July 30, 2015, 02:03:14 AM »

I like that idea and have a plan to try it out tomorrow. Will post pics if successful.

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timbo750 · « **Reply #288 on:** July 30, 2015, 05:46:32 PM »

Managed to get the hub axle in the pedestal drill and made life a lot easier. probable spent no more than 2 hours which included going to the hardware to get some cutting compound. The photos show the state it was in early and how it was held in place, but the polish is better than it looks in the photos although its not a mirror finish.

oldhatt45 · « **Reply #289 on:** July 30, 2015, 05:58:30 PM »

timbo750

Looks really Good!

Maybe you could try some 800 then 1200 grit wet/dry paper. (Definitely wet it)
When I did my hub, it didn't come up real shiny and mirror like until I hit the 1200 grit stage.
And 2 hours is almost instantaneous as far as I'm concerned. LOL

Charlie

timbo750 · « **Reply #290 on:** July 30, 2015, 06:01:55 PM »

I actually went all the way to 2000, then ran some cutting compound on a rag but I did not wet any of the sand paper. 2 hours is quick and there is no way I could do this for a job, I think I had spent about 6-8 hours before trying this with no where near the same result.,

oldhatt45 · « **Reply #291 on:** July 30, 2015, 06:06:13 PM »

timbo750

If you have gone all the way to 2000 grit, then it's probably time to put the polishing wheels on the grinder and hit the hub with at least Green and then White.

Charlie

mystic_1 · « **Reply #292 on:** July 30, 2015, 06:27:33 PM »

Looking good.

What grit did you start with? If you don't go coarse enough then you don't get down through all of the low spots. If it were me, I'd go over it with one more pass, using water to keep your paper lubed and unclogged. Don't move on to the next grit until all the marks from the previous grit have been removed, stepping up too fast through the grits or skipping too far ahead will result is a common mis-step and I think i see some sanding marks still in your pictures.

Another thing you can do is make a "sanding block" by folding your wet paper around a piece of rubber hose, that just fits into the grooves in the hub. That'll help you achieve the super-flat surface you need for a bright polish. On the flat surfaces, use a thin neoprene sanding block, your hands aren't stiff enough to do the job.

As far as polishing, I agree with Oldhatt45, since you're already going the redneck route, chuck a polishing wheel onto an angle grinder, and then use THAT to polish the hub while it spins. A drill press doesn't generate sufficient RPM for actual polishing.

Anyway, stay safe and keep up the good work.

mystic_1

Terry in Australia · « **Reply #293 on:** July 31, 2015, 06:23:39 PM »

Good work Timbo, how do you keep them shiny once you're riding it? Do you give it a coat of clear laquer to protect them from the elements? Unprotected alloy gets a crusty coating of corrosion very quickly in Melbourne winters. I sprayed a pair of K2 fork lowers that I polished, and although the 2K clear took a little of the gloss off them, they were still nice and shiney after a couple of years when I sold that bike. Cheers, Terry.

timbo750 · « **Reply #294 on:** August 03, 2015, 02:10:03 PM »

I made an executive decision yesterday and decided I would be better off paying someone to polish the hub. I went to a guy used before and he said it should within the week and only $40, wish I had of done it at first as I have spent close to forty bucks on polishing wheels and stuff.

Terry in Australia · « **Reply #295 on:** August 04, 2015, 03:44:38 AM »

Yep, I need to get someone to polish my Borrani rear rim before I lace a hub into it Timbo, and I couldn't be bothered doing it, it's filthy work, and not my cup of tea...........

timbo750 · « **Reply #296 on:** August 04, 2015, 03:50:32 AM »

Terry, I am one of those guys that's has to try everything for himself but at least I know when it's not my cup of tea. I also hate doing things with inadequate equipment, so it was always going to take forever for me to it.

The polishing guy did ring me late today and said it was done and was cheaper than he quoted, I would recommend this guy to anyone, good old fashioned honesty and top quality.

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Terry in Australia · « **Reply #297 on:** August 04, 2015, 04:28:28 AM »

Yeah mate, same/same, I've polished more alloy than I care to remember, but all I do remember is being covered in polishing rouge and tiny little bits of polishing mop fibre and thinking to myself, "why don't I just pay someone to do this?". Cheers, Terry.

timbo750 · « **Reply #298 on:** August 05, 2015, 10:27:42 PM »

Got the hub back, great job for $30. All I have to do now is lace the rim and true it, should be a walk in the park.

$:-\$

SOHC4 Cafe Racer Fan · « **Reply #299 on:** August 05, 2015, 10:52:04 PM »

$30 well-spent. I paid about the same to have my fork lowers polished and never looked back!

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Author Topic: CB 750 Project 1 - Rides Well but a few tweaks needed (Read 114198 times)