king cat spark plugs

[icr]

04 carbed 900 with a UB 1000 kit...sled came with BR9ES in it, manual for the stock 900 says BR9EYA. Anyone run both and noticed a difference? I'm inclined to run the ES since that's what was in it...don't want to leave anything on the table though

 

[zr600]

Call Kurt at fastrax and ask him. He is the guy doing the union bay motors know.

 

[corncrackerjimmy]

They are basically the same plug. The EYA just has a grove in the electrobe tip to help prevent plug fouling.

 

[sunbather1969]

i was wondering

what the diff was so now i can buy same plug for all machines then

 

[Rixster]

I know the R in bR9eya is a resistor. The EFI sled's NEED that resistor to cut down a frequency noise that can mess up the computer.

 

[Pedersen]

Go for the br9eya

Not sure what the difference is, but the br9eya can take alot more abuse than the br9es, they will last longer.

 

[icr]

I bought both and just looking at them it looks like the BR9EYA has a longer electrode which is notched as mentioned before. Otherwise identical, the BR9ES was cheaper though.

To the durability of each, I've never run BR9EYA's but I've never had a BR9ES fail, I can't imagine needing a tougher plug.

 

[Idcatman1]

spark plugs

I don't know for sure if the 9ES plugs will cause problems but I know running the 9EYA in an engine that calls for 9ES will. The tips are a little longer and they apparently run a little hotter. I burned pistons on a couple 600 twins and a 600 ZRT 9 or 10 years ago when I got a good buy on EYA plugs. Went back to the ES and no more trouble.