This kind of spark plug with 3 ground electrode is commonly used for drag racing. Anyway, you can still use it for everyday use on normal non-modified bike. I have used this plug for my Lagenda 115ZR from Magnum. The quality of Magnum spark plug and this Racing Bee are as good as the ever popular NGK spark plug. It can withstand high temperature and proven in drag race track (my friend use Magnum spark plug in their drag machine).
Racing Bee RR8E1 Spark Plug for Yamaha 135LC is available for sale here
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