spark plug

I posted about this earlier but I bough a project 79’ 400 that had a screw embedded in the head. I did a top end with a new head and that went fine. Compression went from 90L, 120R to 150 L and R. I went through some issues with the carb but it has been cleaned with a full rebuild (compressed...

On my journey I’ve made a few fumbles - one of those being picking the wrong spark plug. In my naivety I accepted an eBay sellers statement that the BPR7ES superseded the BP7ES thinking “R” just meant better. Like R for racing! Yeah. Anyway, I found one other seller that has a set of two and...

Have an '80-'81 xs400 and just wondering if anyone would happen to have any links or know where I can get a rethreading repair kit for the spark plug ports and a gas cap rubber gasket?

Hey y'all! I have an all-stock 1977 XS360 that is having power issues on the right cylinder that is causing idle issues when coming down from speed (dying at stop lights if I don't keep revved up, but easy kick to start back up; erratic idle when warm). The right cylinder runs way colder than...

So I am not really tearing into my bike too much until winter comes here in utah in around november, but Ive been messing around here and there while still keeping it my daily rider. I am looking into replacing all the aspects of the igniton system on my bike for reliability and modern...

I was reading through the manual and the spark plug required is NGK DR8ES-L. The info on the side cover placard of my bike indicates a NGK D8EA. D8EA is currently in my bike right now. Are these two spark plugs simply interchangeable?

My left spark plug is becoming cross threaded and I want to fix it before a spark plug shoots across the highway. Is it possible to rethread the hole without disassembling the engine? If not, can I take the cylinder head off the bike without taking the engine out of the frame?