Honda-SOHC

I run Continental K112 & RB2 in all weather. Never been an issue and I don't hang around on my 100mile commute I'm soon to change the rear on the 750 as it's now below the wear bar. Three rear to one front

I am sorry to be repeating myself but when my brakes stop squealing, it tells me they need adjusting.  They seem always to squeal and always have for the last 30 years, unless they aren't working properly.  I find it reassuring now and am completely used to it.  I do not believe there is anything that can be done.

I do accept however that having not heard yours, maybe your bike is an excessive offender, but generally speaking, it is a feature one learns to live with.

I have to agree I don't find the squeal a problem.
It now makes me chuckle when I'm giving it the beans and your ears are filled with that lovely 70's noise you just don't get with a modern bike. Then it's rudely interrupted when you have to slam the brakes on hard before the next bend.
I also find people, dogs and cats etc hear you coming and get out of the way. It's turned out to be the best bike I've had for commuting.
The only time it becomes an issue is when you round a corner and are faced with a horse. Trying to slow down without the front brake while dipping the clutch is an interesting experience

Are you running an external fuel filter? As that sounds very similar to what my pegaso was doing years ago.

I often have people telling me its cheap commuting on a motorcycle.
I beg to differ. I started of on the Aprilia the water pump packed up almost instantly. That went on the ramp for pump impeller oil and water seals and a full service,rear caliper rebuild new disk and pads and hoses
Out came the Guzzi got a puncture so on ramp that went. New rear tyre and a full service. Noticed the pads were low. So new pads front and rear. While waiting for parts out came the 750 full service.change of fork oil grease swingarm. Second service today new plugs and noticed the rear tyre is on the wear bar. But on the plus side the bike runs better than it ever has.
I've covered around 2600miles in 4 weeks and enjoyed almost every mile.
It's probably cost me more than £1200 in parts excluding fuel plus £700 to see the chiropractor twice a week to be able to ride.
 
Even after all that I'm dreading having to go back to commuting in the van

I'm crap at welding.
I like the way the welder groans at the end 

Apparently it's got rust inhibitors in it.
The tunnel was speckled and the base of the tank was orange with minor crusty bits in the seams

I can happily report snake oil it ain't.
My tank and carbs are now spotless.
No flat spots and smoother than it's ever been.
I can drop the revs down to just over 1000 rpm in top roll on the throttle and the bike will keep going until it hits the red.