V7 plug cap swap, revisited.

[mr_pacman]

XD05F cap accepts Threaded Stud





This is CPR8EA-9 which has thread stud




XD05F cap will just snap on to the CPR8EA-9

You will feel that click. It is quite subtle tho but def its there.

CPR8EB-9 is the stock plug which has a solid terminal




I didn't swap out the wire. Some people did but mostly from what I know are just purely cosmetics.

Hopefully these helps.

Thanks very much for confirming. I've got the XD05F caps. I'll order the CPR8EA-9 threaded plugs today.

I wasn't sure if many were swapping out the plug wires and other ends or keeping them stock. I have to take my fuel tank off to swap out the voltage regulator this weekend, so figured if I was going to do the other plug ends under the tank, now was the time to do it, but wasn't sure what on the other end of the wires and if it was even worth doing it as it seems like it's the spark plug caps that tend to cause the issue and get loose over time.

Thanks
James

[TimmyTheHog]

for me it was the original rubber cap that had a hole and allowed the spark to gap.

My wires were not fried, but I do know one gentleman that his classic did had a fray cable.

If you are going to pull the tank, I would say inspect the cable and make sure no heat mark, no visible kink & tear.

[Vagrant]

I'd cut 1/4" from the end of the wire, then make sure you screw them on tight. Many left the factory just pushed on.

[tris]

Yep, and you'll have to also change the plugs from CPR8EB-9 to CPR8EA-9.

Another thing to consider is that for both plugs, the "-9" indicates that they come pre-gapped at 0.9 mm.  Although the Moto Guzzi owner's and service manuals state that the spark gaps should be 0.6-0.7 mm, I have found that 0.9 mm works better, on both my previous '13 V7 Stone and my current '16 V7II Stone.

V9 manual shows the same
Puzzled me for a while but I  decided that since the NGK code allows for specific gaps, that must be what is required and the
0.6/0.7 is a typo

If MG wanted 0.6/0.7 they could have specified one and I'm darn sure that MGs engine builders are NOT regapping every plug they fit

[TimmyTheHog]

V9 manual shows the same
Puzzled me for a while but I  decided that since the NGK code allows for specific gaps, that must be what is required and the
0.6/0.7 is a typo

If MG wanted 0.6/0.7 they could have specified one and I'm darn sure that MGs engine builders are NOT re-gapping every plug they fit

For laughs and giggle, I just looked up the V7 classic & Breva spark plug gap, BR8ES has 0.8mm gap

But FWIW, I gapped to 0.9mm and worked fine before I sold it.