L
lotsa_mpg
Guest
I had the head off of my Chinese 80 today and checked a few different plugs I had in stock to see how they fit.
This pic shows an NGK BPMR7A (equivalent to a Champion CJ7Y). Notice that it does not reach the bottom of the threads.
This shot shows the stock plug that came with my engine. It is stamped NHSP LD Z4 071. It nicely reaches the bottom of the threads.
This one shows a Bosch W150M11S (equivalent to an NGK B6HS). This Bosch plug was discontinued back in about 1979, but I still have a couple hundred new old stock ones sitting on the shelf. It seems to fit the same as the original plug. I'm going to put some of these in all my bikes and see how they work. It's a pretty nice looking plug.
I noticed that someone had recommended the Champ CJ7Y. I would not use it in my bike because of it being too short....but it's quite possible that not all Chinese heads are of the same thickness as mine, so it might work well on some engines.
This pic shows an NGK BPMR7A (equivalent to a Champion CJ7Y). Notice that it does not reach the bottom of the threads.
This shot shows the stock plug that came with my engine. It is stamped NHSP LD Z4 071. It nicely reaches the bottom of the threads.
This one shows a Bosch W150M11S (equivalent to an NGK B6HS). This Bosch plug was discontinued back in about 1979, but I still have a couple hundred new old stock ones sitting on the shelf. It seems to fit the same as the original plug. I'm going to put some of these in all my bikes and see how they work. It's a pretty nice looking plug.
I noticed that someone had recommended the Champ CJ7Y. I would not use it in my bike because of it being too short....but it's quite possible that not all Chinese heads are of the same thickness as mine, so it might work well on some engines.