Progress on the 750

[Laverdaroo]

Thats a stunner Johnny, well done mate.
You've got to be 'beaming  from ear to ear' with that? Huge pat on the back from me.

[haynes66]

i'm not happy with this post at all. it's progressing way to fast for my liking and showing me up!  i think i've had my projects since 2016 and i still have loads to do    nice work though

[Laverda Dave]

Very cool looking bike, well done👍

[Oddjob]

Turned out nice that Johnny, wonder why Honda didn’t put the calliper bleed nipple right at the top like the 500, can’t make it easy to bleed and may explain why so many complain of spongey brakes. GL1000 suffered with the same design fault iirc.

What colour is that, doesn’t look like the gold.

[Johnny4428]

Thanks guys for kind words, to be fair I didn’t expect it to be done so quick either. It’s flake sunrise orange Ken fluorescent light is making it look a lot lighter.

[Johnny4428]

Help! Guys I was very concerned about this. Ran bike up yesterday to run through the gears and could only select first gear with difficulty getting Bach in neutral. Couldn’t get any other gears. Took gear selector cover off this afternoon and all gears no problem. Downgraded from major incident to major irritation. Here’s photos see if anybody can see anything wrong before I put cover back on.

[haynes66]

having looked through my pics, the only thing that looks different to mine is the spring that sits on the lever that rolls on the selector drum. your spring doesnt look like its sitting on the notch on the top surface. dont know if that makes sense

[philward]

Johnny, I'd check the order of the parts on the shaft of the arm that rolls on the drum using the parts book schematics - I seem to remember having similar problems on one of the 750's I have built

https://images.cmsnl.com/img/partslists/honda-cb750k2-four-england-gear-shift-drum-stopper_bigma000039e13_f4f1.gif

[Johnny4428]

Thanks guys! I see what you mean spring could be wrong way round? Yes I will check order of selector parts.
Annoyed now with myself for not paying more attention when I put it back together.

[Johnny4428]

Had a go at the gears this morning and sorted the spring that appeared to be wrong way round but didn’t make any difference. It appears that the neutral rotating wheel is fouling on the inside of casing??? That’s easy sorted but it goes against the grain to get into it with the dremel. These are all original parts that were on the bike before. If you zoom in about photo centre you will see small nick.
Ahh different crankcases though!! (Should be the same)

[Nurse Julie]

Don't hack anything yet Johnny, I think I can see what the problem is by your photo, I'm just trying to find something to show you how it should be assembled.

[Nurse Julie]

The 1st mistake is that you have assembled the gearbox and put the neutral switch in last. The way you assemble the 750/4 gearbox is put the drum selector in first, then fit the neutral switch then the rest of the gearbox. The way you have it set up at the moment, the selector drum is being pulled out by the little jockey wheel thingy. I will post a couple of pics in a minute.

[Nurse Julie]

You have the little wheel sitting BEHIND the selector drum like so, which is incorrect, this pulls the drum forward and OUT causing impingement on case. In effect, you are pulling the selector drum out too far.

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The little wheel needs to be sitting ON the selector drum, so as not put any pressure on the selector drum so it sits in the correct place.

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[K2-K6]

Additional to Julie's information,  does the outer disc of the drum have distortion at about 1:30 on a clock face ?

I know a photo can give distortion but that's usually at the extreme edge of image, this looks as if the disc face is bowing outward at that point relative to the remaining part of that disc.

[Johnny4428]

Thanks very much guys. Julie I have checked this and here is my pic taken just now.