This explains it clearly Al. Follow the arrow directions although in our case it would be plug 1 & 4 and 2 & 3. I've had this conversation with Graham previously.

Just cut a new one from an old inner tube. If you don't have one your local tyre fitters will have plenty in the rubbish bin.

Glad you made it nik

Fingers crossed.

Yeah, the ones without are pointless (excuse the pun )

r3sc, one proviso, Graham has the replacements that have a adjuster for each points set aswell as adjusting thing the back plate. Many repop plates don't have the adjusters on each set of points.

Hmmmm, cylinder 1 & 3 looks a little suspicious. 1 being lowish with no oil and 3 having a big increase with oil. Cylinders 1 & 4 are normally fairly equal as are cylinders 2 & 3. Cylinders 2 & 3 are normally a little lower than 1 & 4 as they are in the middle and get less coolin...

Graham, take two reading per cylinder. One cold, throttle fully open, no plugs, cranks the starter until reading stops increasing. Second same as first but with a few ml of oil squirted into the cylinder. A significant increase will show a rings/bore issue. No significant increase but low reading sh...

for instantaneous fuse popping your looking for a live feed shorting to ground, however mebe its me but im unsure what the 10a fuse is doin :oops: i.e is it protecting the feed from the relay contacts to the coils or protecting the relay coil from the battery feed either way you have a short to gro...

Well as every fuse you've put in has blown immediately the feed to the coils wouldn't be live so they should be fine.
Did it blow the fuse without turning on the ignition or did it blow as soon as you did?

How can they have gone heavy? unless they have been punctured?
Would a bit of heat to dry them out and dip in por15 not sort them out?
Correct part number 16031-024? Z fever Germany.

Sounds like the relay shorted directly to earth which blew the fuse. That probably means the connectors inside the relay will likely have fused in the closed position. If that's the case once the fuse was replaced, if it didn't blow again immediately, the battery might have already fried. Take a spa...

Have you got a colour tune David? That'll confirm mixture burn colour are all equal. Timing to both coils the same? Plugs all the same heat range? but that shouldn't affect header temps. Only other thing that could be affecting temp readings of the headers is whether they are twin walled or not but ...

Graham is the same vac cap that's blowing off or does it vary? For a vac cap to blow off you have positive pressure in the inlet when you should only have zero or negative pressure. If it's the same cap every time then that cylinder must either have a hanging valve or a poor seated valve or pre igni...

So it is running on 1 & 4 at tickover?