https://www.ebay.co.uk/itm/165700214861?hash=item269480a04d:g:IDYAAOSwPu1kHtN7&amdata=enc%3AAQAIAAAA0NLcyNxRz%2B2L4B65mqz4%2BM8GYh26vJPXnyJhIkjU9v%2Fs6HNdhRnkdXqDSY8NOShDXWHo9Ky7Cv0mrM2krGKOUClN8zgPSSgVArkWwYjGZJqKhLhoieyoirBVV4%2FrSujrixBr5xvf6z37NtHJp%2BUVCkg2q3B5MtP6dUFrU7aUGA15KVGNg2UhkwDE2o...

I might be talking out of my hat here because i dont know the early engines but the Z900 manual shows a differnt 'bolt' (two stage bolt with spring and ball) in the aluminium boss you have pictured. This 'two stage bolt' appears to have a fine thread and the bolt (single head you have pictured) appe...

Hi Phil, SAE is a range rather than an actual number. 15 is probably from 12.5 to 17.5 for example. Not all producers use SAE, or use it the same way so its a bit of a lottery. Cst is the correct way to assess fork oil and you wont get that on the bottle. Safest to change it all since you need to bu...

https://www.z-power.co.uk/pin-auto-advancer-z-series
AL

Are they similar to the Z1R?

https://www.ebay.co.uk/itm/385619935693 ... XQjq5Q~c9D

AL

How about a hollow shaft with a shoulder on the inboard end. Shoulder detail is a mimic of the base of the advance and retard unit so uses the pin and slot to locate it. Longer bolt through the middle and away you go.
AL

Pin is available new from ZPower etc and is about £3. Just measured the inner track on the LHS of my J crank here and it is 32mm for information only. I would have a word with Ray at Debben Performance in Ringwood. He's been repairing / re-building Zed cranks for donkeys years, perhaps he can help w...

This has come up on here quite a bit in the past but not seen it recently. I dont know if its the same because you dont give details but i think it was generally accepted that it was frequently caused by poor repairs to cam cap threads particularly the J heads which are made from drop forged peanut ...

Cheapest place to buy DRL300 in the UK is DynatekUk limited, who knew?
Its £179 but they have a 15% off discount on that.
You will get a receipt and of course a guarantee for this which you may not get elsewhere!!!
AL

Excellent Chris well done. It was a landmark moment for me when you bought that bike, thats what got it all started in my funny little world!
AL

Thats encouraging; either 28 or 29 degrees rake angle which i am sure is about right but i dont have numbers for the ST. The J's vary from 27 to 29 through the different model years so it looks like it was hit 'side on' and there is no significant frontal component to the damage. Be a shame to try y...

Did you have a chance to measure the rake angle either direct off the headstock or from the fork legs?
AL

Have you come to any conclusions here or ideas' about where you are going to go with it? Al, I could get a measurement underneath the swingarm pivot and it was 0 but with the bracing and welds around the headstock I was't confident with the reliability. I did get 88 both sides which makes sense but ...

Clutch friction plate is in back to front, others also perhaps. Outer dished part of the sprocket lock mechanism is on back to front. It has a double hex which locks the head of the bolt. You can masking tape across the front face of the rotor drum after a good clean up and fill the gap with ordinar...

Pete, what would be the angle of the top surface of the swingarm at the front pivot subtracted fomm the angle of the side of the headstock? Hopefully 90!!
You can use a say; inch square piece of wood to step off from the headstock.
AL