Topic: CB 750 Project 1 - Rides Well but a few tweaks needed

[timbo750]

All I have to do now is keep it clean.

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[Retro Rocket]

All I have to do now is keep it clean.

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Clear powdercoat it...

[Terry in Australia]

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.

That looks great Timbo, 30 bucks well spent, well done!

[knottedknickers]

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.

This might make it a bit easier: https://www.diymotofix.com/blog/how-to-true-a-dirt-bike-wheel-yourself. And this: http://forums.sohc4.net/index.php/topic,19575.msg204639.html#msg204639.

[SOHC4 Cafe Racer Fan]

All I have to do now is keep it clean.

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Clear powdercoat it...

That's what I did.

[timbo750]

Dropped it off for clear coat.  Hope he does a good job, the guy was a bit rough and place a bit of a mess but he does a few bikes and rides dirt bikes as well. So I figure his quality is better ghan his appearance.

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[calj737]

Just double check the threads upon return of the part. With clear powder coat, it's essential to test the fitment as its harder to see than a color when they overspray/under tape.

[timbo750]

I did get an assurance that threads would be clean

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[timbo750]

Finally got the hub back and as said by cal the clear is very hard to see and provides a great finish over the polished aluminium. However there are few spots where the powder doesn't look quite right, it was only $20 and I now just want to get this done and it will only be noticeable by me once its all done, so if I can live with it then so must every body else. All I have to do now this weekend is lace and true, fun, fun ,fun

[oldhatt45]

timbo750,

How about a picture of the finished product?? 

The lacing and truing is the EASY part.   

I know once I figured out the secret, it only took 20 minutes to do the lacing.
If you need the secret, just let me know.

Charlie

[timbo750]

timbo750,

How about a picture of the finished product?? 

The lacing and truing is the EASY part.   

I know once I figured out the secret, it only took 20 minutes to do the lacing.
If you need the secret, just let me know.

Charlie

I will get a picture up tonight hopefully. I have read heaps on the lacing but anymore help is always appreciated.

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[oldhatt45]

timbo750,

OK, here is the secret.  Look at the Picture attached.  (Click on it to make it bigger and Print it out.    )
Doesn't matter if it's a front or rear as long as it's a 40 spoke wheel.
Valve stem at the bottom.
Spoke to the Right of the Valve Stem goes to the BOTTOM of the Hub and is what everyone calls an "INNER".  Green Outline Arrow points to it.
Blue Outlined White Arrow points to the Spoke hole in the TOP of the Hub, just to the left of the Bottom spoke with the Green Arrow.
Purple lines show the approximate space.
Starting with the Spoke hole with the Blue Outlined arrow as HOLE NUMBER 1, count to the LEFT to the Spoke hole pointed to by the RED Arrow.  It's number 5.  That is where the SPOKE to the LEFT of the VALVE STEM goes on the TOP of the Hub (also an "INNER").

So, Start your Lacing with Bottom of the hub, using the spoke hole to the right of the valve stem. When done with the Bottom then locate the TOP spoke hole per what I just said and you are done correctly.  Every post on lacing shows a good procedure but doesn't give you what I show in the picture.  If you don't understand, just ask.

Hope this helps.

Charlie

Hope this makes sense.

[timbo750]

Got all the spokes installed,  starts out awkward as they flop around everywhere buts gets easier as they stay in place.

Started truing the rim now and luck is on my side as its within 0.5mm. However I dont think it's torqued enough yet.

Can anyone tell me how to know if the torque is enough without a spoke torque wrench.

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[timbo750]

Ok, found some info that said to tap all the spokes and make sure they all have the same high pitched 'ting' when tapped with a long screwdriver. So I tried it and made some more adjustments and I think I got it right. 

All the spokes seem tight and is true within 0.4mm.

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[Terry in Australia]

Well done Timbo, how close are you to finishing your build? Cheers, Terry.

[timbo750]

Terry, unfortunately not much closer than a couple of months ago. The cold weather has dwindled the motivation and having to redo this wheel took mund away from the engine.

But now that the weather is warming up I am hoping to getthings moving again.

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[Terry in Australia]

No worries mate, you'll have it done by the time the weather's nice enough to ride it.

[timbo750]

Here are some photos of the finished rim and some close ups of the clear powder coated hub.

[SOHC4 Cafe Racer Fan]

Purty.

[timbo750]

The clear powder coat actually improved the polished look, it gives it some depth. The stainless spokes are also a great finish.

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[Terry in Australia]

If the rest of your bike looks as good as that Tim, it'll be a show stopper!

[timbo750]

After looking at the front wheel, I now think that the rear needs doing. But I will wait till its on the road and do it over a winter.

For the moment though no progress till we get back from 2 weeks camping. Then I will focus on getting the engine assembled.

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[timbo750]

Finally got back in the shed. I got the wheel back on and started reassembling the brakes when somehow I stuffed the PC on one of the calipers. So I stripped it back and I am trying to refinish with caliper paint, should be close enough to a match.

Also started on getting the engine cases ready for assembly, the JB weld I was using to patch around a broken thread just wouldn't go hard. It set a stuck well but was like firm rubber and I can guarantee that there was a minimum of 50% hardner. So I found another product that is far better called Sun Fix. It's 2 parts that are like plasticine, cut of equal parts a mix in your hand. You get 20min to work it and goes hard in approx 3 hrs, it can be drilled, machined and tapped.

I  am also making the most of the fact that the wife and kids are out for a few hours and I am cleaning the cases in the dishwasher.

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[Terry in Australia]

Well done mate, I haven't had a problem with JB Weld before, so maybe you got a bad batch? I used to use Devcon, which was horribly expensive, but space shuttle quality, I knew a guy in Brisbane who put a rod thru the block of a V8 Torana and just patched the hole with Devcon, and it was still running when I again made contact with him a few years later.

The Sun Fix sounds a bit like the radiator and fuel tank repair stuff I used many years ago on a hole in my XA Fairmont's fuel tank, it leaked all the way to Dubbo, I patched it with this stuff hoping it'd make it to Brisbane, and it was still blocking the hole when I replaced the tank 2 years later. Good stuff.

Let us know how well the dishwasher cleaned your cases, there was a journo for a British bike mag who swore by it. Cheers, Terry.  

[calj737]

... but space shuttle quality...

That aircraft with over 1,000,000 parts built by the lowest bidder?  In case you hadn't noticed, they've had a "few" mishaps during launches in the past. If you factor in the number of flights versus the number of catastrophic failures, you'd probably rather have a Yugo...

(Tongue and cheek, of course)