yes i understand what you're saying.but there's a couple of points.
1. it is alleged and only a rumour so far, that here in oz, a big batch of ngk's have entered our shoresfrom china....and they're supposed to be copies.not that my set were in one of those batches, i cant tell as
they look quite genuine to me..........but it's a thought.2. the ngk plugs that i have changed were brand new, with only about 20 minutes running time on them....3. this very same thing happened to me, earlier this yearwith my guzzi, which is a fully restored 1973 bike complete with a new engine,
upon introducing the bosch plugs on it, i have had no issues....yet.4. i spoke with my mechanic who did the $2000 job on thebike and told him what had happened and that i had replaced the ngk for the denso's.
he promptly saidto me, that he had another bike, a yamaha that had the exact same issues and
found it in the end that it was the plugs he had put in,
but never thoughtanything of it and continued to replace those .....they were indeed ngk's.i always had my suspicion on the plugs, after the episode with my guzzi,but i didn't discount the coils either.for sure, i never at any point thought it would have beenthe carbs.i guess time and a couple of long rides will tell.i will do that and i will know .
