CB750f restoration

hondaman · L Plate Warrior Joined: 14 Jun 2007 Karma :

Looking forward to working with interested members in the forum. The bike has been under a tarp on the back lawn for 4 years. Previous to that, the males in the family had ridden it for a couple of years after their father passed on.
So Ive ended up with it. The missus's aunty wanted it off her back lawn. Its a great score I think, but more will be revealed as I delve into the systems, ie, brake calipers, forks, electrics, motor, bearings and rubbers etc. I have stripped it down and sent the frame for garnet blasting and painting. The motor looks ok. Didnt try to start it prior to the breakdown.
Will add some pics as the rebuild progresses. The bike is a cb750f model 1984, I think, probably the last of the F models. It is fitted with a hondaline fairing, and looks similar to the pic on the cover of the manual. engine no: RCO1E-4306492. Frame: RCO4-1042309. Would appreciate any input from our members.
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"I might be over the hill, but thats better than being under it", he said, as he gave the old girl a big handful.

owdamer · World Chat Champion Joined: 06 Oct 2004 Karma :

If its got the same fairing as the cover of the manual isn't is a cb750f2?

My mate used to own a cb900f2 years ago, lovely bike, same colours as yours. I always wanted one at the time, still do really but i'd prefer one without a fairing and done up to resemble the old style superbikes.

https://www.cruisercustomizing.com/graphics/honda_09.jpg

hondaman · L Plate Warrior Joined: 14 Jun 2007 Karma :

You know, Im not really sure myself. I put it out there in the Kiwi rider forum. One thought it was a 84 cb750f, maybe the last of that model. He recognised the fairing as the same one used on the pro link model cbx1000 six cylinder.
Another checked the engine and frame nos. and came up with year 84. something about the "E" in the group of engine numbers.
You could be right though. Needs further investigation. Ive never ridden any long distance with any fairing. I like to see the front wheel
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"I might be over the hill, but thats better than being under it", he said, as he gave the old girl a big handful.

hmmmnz · Super Spammer Joined: 22 Aug 2006 Karma :

classic

my mates old man use to have one when we were kids Very Happy

fairly bullet proof Very Happy

have fun rebuilding her
Thumbs Up

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the humans are dead
I kick arse for the lord
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owdamer · World Chat Champion Joined: 06 Oct 2004 Karma :

You could get over to https://www.cb1100f.net/

Someone there may be abole to give you more info.
Also you could try https://www.davidsilverspares.co.uk/
for spares and theres some good links on there.

hondaman · L Plate Warrior Joined: 14 Jun 2007 Karma :

Ive finally found a pic of the bike. It is a f2 integra 1984.
Thanks for the comments. I hope you guys check in periodically to check the progess and offer your thoughts.
excellent. The pic shown is the same bike without the fairing. Its on trademe (online auction)here in new zealand.
____________________
"I might be over the hill, but thats better than being under it", he said, as he gave the old girl a big handful.

Diggs · World Chat Champion Joined: 03 Apr 2007 Karma :

Its a good bike, once the top end, cam chain and pistons are sorted... assuming they are shagged of course. Given that its been standing its a fair bet that the reason will be one of the above...

My old CB750FII was a cracking bike if I recall. For its day it is fast, comfortable and typically 'Honda' in that everything feels right...

Good luck with the restoration!
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Now - Speed Triple, old ratty GS550, GSXR750M
Gone (in order of ownership) - Raleigh Runabout, AP50, KH125, GP125, KH250, CBX550, Z400, CB750FII, 250LC, GS550, ZXR750H1, Guzzi Targa, GSX750F, KH250 x2, Bimota SB6R and counting...

owdamer · World Chat Champion Joined: 06 Oct 2004 Karma :

I dont know how comfy they were to ride, but from a passengers point of view, never again!. awful....
My mate & I decided to go to the bike show at birmingham nec one year, He turns up at my house in the morning, and when I said I just had to unlock my bike and I would be ready he suggested just going on his bike, that way I could have a few drinks If I wanted. This sounded like a great idea to me so I jumped on the back of his bike. I had only got 1/2 a mile before I was regretting it. By the time we had done the 100 miles to birmingham my arse was killing.
I spent the rest of the day dreading the trip back. Never again! Shocked

Diggs · World Chat Champion Joined: 03 Apr 2007 Karma :

Must be due to arse-shape...

I took a mate (6'2", like a beanpole with bones instead of arse padding) from Wakefield to Brands, camping gear and all, and the skinny bugger could still walk afterwards. The only complaint he had was me dropping it at walking speeds playing at ploughing...
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Now - Speed Triple, old ratty GS550, GSXR750M
Gone (in order of ownership) - Raleigh Runabout, AP50, KH125, GP125, KH250, CBX550, Z400, CB750FII, 250LC, GS550, ZXR750H1, Guzzi Targa, GSX750F, KH250 x2, Bimota SB6R and counting...

owdamer · World Chat Champion Joined: 06 Oct 2004 Karma :

very odd. i'm about 6"1, slimish and my arse felt like it had been kicked from home to birmingham & back.

ZRX61 · Victor Meldrew Joined: 05 Nov 2003 Karma :

hondaman · L Plate Warrior Joined: 14 Jun 2007 Karma :

I pick up the frame on monday. Im a skinny arse too. I used to do some big mileage in australia. Adelaide to sydney is 1600 miles and it would take me two days. I would ride to Barrallen, a town roughly halfway. Some of my mates live there. I would be buggered by the time I got there. The seat was comfortable normally, but my legs used to cramp up and get stiff and sore. The standard footpeg placement was not conducive to long daily riding. Interestingly enough, I never tried to mount forward footpegs on any of the bikes I owned in Australia. Anyway, after a good nights sleep, Id be away again in the morning heading to my destination. You obviously needed SOMETHING FOR THE HEAD, to keep the strength up. lol
____________________
"I might be over the hill, but thats better than being under it", he said, as he gave the old girl a big handful.

bugsy46 · Village Idiot Joined: 16 Mar 2004 Karma :

diggs you from wakefield?
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Laura - "And where did looks come into this and bugsy leave steven alone. You are not gods gift to women you may think you are but you're not."
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Diggs · World Chat Champion Joined: 03 Apr 2007 Karma :

You, Bugsy?

I lived there for 10 years - in Stanley & Outwood...
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Now - Speed Triple, old ratty GS550, GSXR750M
Gone (in order of ownership) - Raleigh Runabout, AP50, KH125, GP125, KH250, CBX550, Z400, CB750FII, 250LC, GS550, ZXR750H1, Guzzi Targa, GSX750F, KH250 x2, Bimota SB6R and counting...

hondaman · L Plate Warrior Joined: 14 Jun 2007 Karma :

I cant get the pistons out. They are pretty tight in there. The o-rings are exposed. The pistons have grabbed them and rolled them outwards. I can see the edges of the o-rings at the base of the pistons, where it leaves the cylinders.
The local bike shop tried air pressure. No good. The o-rings are buggered. What should I do?
Sad

Is there a bath solution that may work? Thats why its tighter, I presume. The bike has been sitting under a tarp for four years. The master cylinder is probably stuffed too.
Thanks for any comments. cb750fc
____________________
"I might be over the hill, but thats better than being under it", he said, as he gave the old girl a big handful.

hondaman · L Plate Warrior Joined: 14 Jun 2007 Karma :

These frames look ok. Garnet blasting and coatings applied.
Frame/subframe/swinging arm/engine brackets
cost: =$350.
seat cover = $50.
$600 to spend to try and keep this restoration under $1000. Have I got a chance?
Smile

____________________
"I might be over the hill, but thats better than being under it", he said, as he gave the old girl a big handful.

Bru · Trackday Trickster Joined: 01 Feb 2007 Karma :

Hi. I had a similar problem, albeit with two single-pot calipers. Anyway, forget the air. Your best bet is to reconnect the system (a pain, I know) and pump the pistons out with fluid. I blocked the other caliper side by simply screwing a nut onto the banjo bolt (on the hose end), instead of connecting it to the caliper (but with the washers, of course). That way, you do not have to worry about bleeding the other caliper and holding its pistons in place. You do not need much pressure (relatively), and only have to make sure that the pistons move together. You may have to alternately block one and then the other to get them moving out together.

Big Pete · Spanner Monkey Joined: 18 Jul 2004 Karma :

Bru is spot on, pump them out using a master cylinder. BTW, IIRC there are two seals on those calipers, an outer "dust" seal, which is what you can see and an inner fluid seal.

I had one of those 750s years ago, decent bike, prone to camchain issues, but easy enough to sort with new parts. Be warned, the carbs are likely clogged full of goo from stale juice and will need stripping. Also, its worth turning the lump over a few times with some light oil down the bores (and the plugs out), parrafin/diesel are both good, it helps free up the rings and will help protect the bore. Turn it over by hand rather than on the starter so you dont spray your workshop with parrafin Laughing

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hondaman · L Plate Warrior Joined: 14 Jun 2007 Karma :

The master cylinder is seized up too. I havent pulled it down yet. Cant get one of the tank caps screw out. The piston and bore are probably stuffed.
____________________
"I might be over the hill, but thats better than being under it", he said, as he gave the old girl a big handful.

hondaman · L Plate Warrior Joined: 14 Jun 2007 Karma :

I took off the bottom bowls and removed the rubber caps to clean out the idling jets. Very clean in there. The residue petrol lying at the bottoms of the bowls, was clean. No white buildup anywhere. No varnishing spots. Gave the bowls a wipe out and replaced. I didnt touch the other jets. Amazing, since the bike has been sitting under a tarp for four years. However, the brake system is a different story. With brake fluid being of a type that draws condensation from out of the air, plus the fact that the tarp has not allowed the condensation buildup to go anywhere except settle on the bike parts, rust found a new home.
____________________
"I might be over the hill, but thats better than being under it", he said, as he gave the old girl a big handful.

hmmmnz · Super Spammer Joined: 22 Aug 2006 Karma :

lol good stuff mate Very Happy

getting there.
your best bet might be to try nd find new calipers and master cylinder
atleast their is no salt on the road in nz. if the bike faced thesame condition over here, you'd lift that tarp and there wouldnt be a bike just a couple of tyres, and a few plastic bits Very Happy

____________________
the humans are dead
I kick arse for the lord
Wiring Diagrams BIDNIP it bitches