You might be better using a thread chaser rather than a thread tap as the chaser is less likely to remove material from the holes. Obviously is the threads are damaged a tap may well be needed, but initially I'd use a chaser if you're just cleaning out threads.

The '76 A4's had two "indicator" relays.
The picture with the circled item on is where the hazard indicator lives & the normal turn indicator relay lives behind the left-hand side panel, just near the seat lock barrel.

Isn't Esso 99 octane ethanol-free in most parts of the country? I appreciate that it won't stay "fresh" as long as some of the specialist racing fuels and additives, but it's a lot cheaper! I was under the impression, according to the Esso web site, that in certain areas, (including the N...

Possibly DK Motorcycles, over here in Stafford area I think. I'm sure they import alot of Z1/Z900's & break some of them. They also sell alot of parts on Ebay.

https://www.dkmotorcycles.com/

I just use some engine oil, new of course not old stuff !! Just whatever I have on the shelf, blank off the fuel tap hole, tip some in & swill it around until it's covered all surfaces.
Depending upon how long you intend to leave it, periodically give it a swill around every few months.

I'd try & avoid drilling it out unless there seems to be no other option. Drilling is more a "last resort" ! The longer you can leave the PlusGas soaking the better, I'd even apply a little heat where the bolt passes through both sides of the engine & the frame, but be careful if y...

Depending upon your budget, Probike have a good selection of lifts.

One of my mates has one of these, https://probike.co.uk/lifts-stands/moto ... issor-lift & for the money I thought it is an excellent bit of kit.
You do need a compressor though to operate it.

It's a common-ish problem & has been for years. I had one pop out on the North Circular in 1980, on the way to France !! I'd serviced my bike before leaving & fitted new plugs as a precaution. Luckily I had taken the old ones & gasket glue with me, how lucky was that ?!! Maybe I had a pr...

were's the relay Steve ........electrics are not my strongest point :oops: It should be attached by a rubber sleeve, under the fuel tank close to the two ignition coils, left hand side. I think you should be able to see it if you look under the tank, between the top of the motor. I think there's a ...

The black, finned gadget in one of your pictures is the diode pack for the hazard light flasher. The two un-connected terminals, the ORANGE & BROWN wires should connect to the hazard light flasher relay. The standard unit is the type that only has two terminals. This however has no affect on the...

Spotted this Z1/Z900 in Matlock today, anybody on here ?

So, could it be that the original posters forks are from either a Z650 or A4, depending upon what internal springs are fitted ?

They could also be Z900-A4 forks as they are also the same 36mm.
Mudguard stay mounts are not used on the A4's.

I seem to remember if you align the crankshaft correctly to the "T" mark for cylinders 1 & 4 you then position the exhaust camshaft according to the manual, (you should also place the inlet camshaft in position to support the camchain - this also stops any slack causing the cam chain t...