76-KZ900 here. Do any of you guys foresee an issue with using BP8ES instead of B8ES for my bike? I believe the only difference is that the BP8ES are extended, so I would think clearance with the piston would be the only problem if there was one? If this is not an issue, my next question is what spark plug boots do you recommend?
You may be correct Ed. But I've heard from several sources that they are stopping production. It's been discussed here. I wouldn't trust Amazon to sell NGK plugs made by NGK in Japan. Fake NGK plugs are known to exist.
Edited to add that if they are still made, and that's the OEM plug of choice then that''s what I would use.
I have a couple of Z1B's restored, an '80 KZ1000LTD restored, a 1981 KZ550 restored and a 2008 KLR 650 for off road fun. My wife has a 2019 Suzuki DR 650 for on and off road.
NGK plug caps are similar to the OEM caps. They have a resistor built in (thus the plug doesn't need one.)
NGK makes non-resistor caps as well in all the same angles as the resistor cap. Other than the part number etched onto the side I couldn’t tell them apart visually. I think Z1 Enterprises used to carry the full range of styles, not sure if they do anymore or not. Maybe it was Dennis Kirk?