I've ridden them and they are called BPR & ES because they have a resistor inside about 6 K Ohm. You do not need the BPR 7 ES when your bike has resistor caps. Too many resistors will make the spark less bright and strong, the bike will start not as good as only running one resistor. It's easy to measure with an ohm meter. If your spark plug caps have 6 K Ohm, then order the BPP 7 Es spark plugs and your bike will run fine. These bikes run better with such plugs, no need to pay a lot of money for Iridium plugs. And you can "read these plugs much better. The plugs are real, no fake ones made in China, that's for sure. Webike get their stuff from japan, and that's good to know. Be careful when plugs are too cheap, China copies pretty much all plugs and it's impossible to see if it's a real one, or a fake. The problem with fake plugs is that parts can fall into the combustion chamber and destroy your valves and pistons. E-bay sells way too many fake spark plugs, even the sellers of fake plugs warn you that there are copies out there. be alert!
I've made the mistake and bought BPR 7 ES at first. The R stands for Resistor, but the cabs have a resistor and you don't need resistor caps. This is my spark plug after 150 km with a new aftermarket exhaust. 100 % good combustion. I even made the mixture a little bit richer. Even when you see in some Yamaha books that you should run BPR 7, check the resistance of your cap, first. If the cap has 6 Kilo Ohm, then no need for another resistor. . The BP 7 ES are for most Yamaha Viragos the best spark plugs. The problem is that eBay these days even sell fake plugs from China. I know that Webike gets their stuff from Japan, so no need to worry about a nightmare of fake plugs in my bike. The price is also okay, will buy them again when I need new ones. Only 4 days from order to delivery is good.
You can make it high throttle while using OEMThrottle holder. When Axel is fully opened, Throttle does not need to grasp again, so comfortable Axel operation is possible at the time of Touring. Easy installation with replacement with Pulley on the injection side only. SR400FI (Injection model) Will be compatible.