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Messages - Grewth

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1
CB750 / Re: F1 bleed nipple thread stripped
« on: April 18, 2026, 02:29:42 PM »
ER.       Getting the master apart!!
I usually resort to the gas cooker hob for this job.
A bit drastic but the troublesome circlip usually surrenders a lot sooner when given a good roasting first.

2
CB750 / Re: F1 bleed nipple thread stripped
« on: April 17, 2026, 11:29:18 PM »
Many thanks for all the replies.
I've been doing some research myself and ended up buying a pair of replacement inserts and a M9 x1 tap set.
Then I tried drilling out the sheared bleed nipple on the F1 caliper I'd stashed at work, and it was an was an absolute nightmare.
So now that caliper body is tapped M10 x1 thanks to a 9mm drill and a tap borrowed from a workmate.
Got to order two M10 x 1 inserts now, another £11, but still pretty small beer really.
So now at least I know that I can use an M10 insert in a F1 caliper.
Hopefully everything will be pretty straightforward after this.
New stainless piston,  new seals, new lines, master cylinder repair kit.
What could possibly go wrong  ?

3
CB750 / F1 bleed nipple thread stripped
« on: April 16, 2026, 06:18:06 PM »
I found quite a nice looking caliper for my F1, piston came out easily.
No such luck with the bleed nipple.
Roasted the caliper body on the gas hob, my usual trick, the nipple did unscrew (well sort of), but ripped the thread out of the caliper body on its way out.
Oh well, that's better than the nipple shearing off in the caliper.
Now I'm thinking maybe I could drill oversized and tap for an oversized nipple.
Or maybe a helicoil insert  (although I really don't like them) ?
Is there any economically viable repair possible  ?
Or do I have a lump of scrap aluminium  ?

4
CB750 / Re: Honda CB750 Four K1 1971 Reduced in price
« on: April 04, 2026, 06:42:28 PM »
"Owner kept the original frame and crankcase,  but an unscrupulous scrap man took them away"
Absolutely brilliant  !
I think that I'd rather dangle my genitals into a tank full of Piranhas

5
CB750 / Re: CB750 K6 fuel tap repair kit
« on: March 24, 2026, 05:35:35 PM »
My experience with fuel tap repair kits is that they don't fit properly and don't work.
Many years ago I bought a repair kit for the dreaded Suzuki GT750 Vacuum Fuel Tap.
It needed more vacuum than the manifold delivered, at least at large throttle openings.
Loads of fun sorting that one out, ended up with a NOS genuine tap instead.
Buy cheap buy twice  ?

6
CB750 / Re: Fixing cracked side panels
« on: March 11, 2026, 11:14:15 PM »
Thanks for the advice everyone  !
Woven glassfibre matting and epoxy resin it is then.
I'm only doing it to preserve the original paint on the panels, they'll last as long as they last, and when they finally fall apart,  they'll be binned.
I've already got a set of the LPM panels,  and very well made they are,  although polypropylene is supposed to be a pig to get paint to stick to.
They still sell on ebay

7
CB750 / Fixing cracked side panels
« on: March 11, 2026, 12:22:17 AM »
Can anyone tell me exactly what plastic the original Honda side panels were made from, and what will stick to them properly  ?
I've managed to find a pair with paintwork to match my K4 tank .
The trouble is that both have hairline cracks here and there.
I'm thinking that if I don't reinforce them on the inside somehow,  they're going to disintegrate if I start using them on the road.

8
CB500/550 / Re: Brake caliper pivot pin
« on: March 09, 2026, 12:21:15 AM »
I always roast mine on the gas cooker hob.
Works every time with caliper swing arms, and also caliper bodies with seized pistons.
Good ventilation required unless you want to be overwhelmed by smoke inhalation

9
CB750 / Re: Honda CB750F1 Main stand removal.
« on: March 04, 2026, 06:01:03 PM »
I'll be welding a 6mm nut to my stand to accommodate a grease nipple.
And also I'll weld a plate on the end of the shaft for an extra locating bolt, so it can't possibly start to rotate

10
CB750 / Re: Honda CB750F1 Main stand removal.
« on: March 04, 2026, 12:57:58 PM »
I usually make myself a sort of hook with a big handle to grab the spring and remove it.
Much safer than prying with a screwdriver.
Is your stand still rotating on the through shaft ?
All of my 750's have been seized in with rust and the shaft has been turning in the frame.

11
CB750 / Re: Front brake pads
« on: February 22, 2026, 10:15:06 PM »
If you think that your K7 is bad, it's  got the improved caliper introduced with the F1 with theoretically 21% more braking force than the earlier type.
Maybe it's because I grew up with Japanese bikes in the '70's, I don't seem to be disturbed by the lack of braking power.

12
CB750 / Re: Recutting valve seats
« on: February 09, 2026, 06:48:51 PM »
I've got a couple of heads in a similar state.
Plus one that some idiot shot blasted with the valves and springs in place.
I'll be watching this with some interest.
Hopefully you'll be able to save it.
You're not charging yourself for your time, so an alternative approach might save the day, even if it's not economically viable in a commercial repair shop.

13
Misc / Open / Re: Decent Old Suzuki forums anywhere ?
« on: February 06, 2026, 08:43:09 PM »
Well, I've managed to register on the GS resources forums.
So far, I haven't been banned or accused of being a scammer.
Site still seems to be active,  no tumbleweeds blowing about as far as I can see, and also representation from people running the shaft drive GS bikes too.
The Old Skool Suzuki site seemed to be populated by total speed freaks doing what, to me, seems nonsensical stuff.
Like taking some poor innocent GS750, fitting upside down forks,  monoshock rear end, modern wheels and brakes, and finally chucking  in a 1200 Bandit engine.
A wonderful feat of engineering to be sure.
But why not just buy a Bandit 1200 in the first place  ?

14
Misc / Open / Re: Decent Old Suzuki forums anywhere ?
« on: February 06, 2026, 12:56:38 PM »
Hi Grewth,
One that certainly used to be pretty good was the GS Resources US site but I haven't been there for quite a while.
Was very good when I was working on the GS1000 and GSX1100 with lots of guys who had vast experience and knowledge and quite a bit of useful technical downloads etc.

Cheers,
Andy

https://www.thegsresources.com/

Many thanks  Andy !
I'll try to track it down  (if it's still alive) this weekend

15
Misc / Open / Re: Decent Old Suzuki forums anywhere ?
« on: February 06, 2026, 12:54:08 PM »
The only one I have heard of is the kettle owners club. There is a forum but you need to be a member.

Regards
Dave
I bought a GT750B when I was 18 back in 1978.
Maybe I'll own another one before I end up with a zimmer frame.
I'd suspect that the GS750 probably isn't their very favourite bike, as it replaced the GT as Suzuki's flagship if only for a very short reign.
I also suspect that if I joined the kettle club, it might result in some very expensive purchases

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