Spark Plug change and DET

[ditch1000]

Anyone ever had this happen???

I was riding all day yesterday and the sled was rockin all day. On the way out the trail, the mag side spark plug fouled (original BR9ES plug with 1200miles). I put in the spare plugs in the tool kit; they were not BR9ES but some other weird number I can't remember. On the way out on the trail is would keep DET in the mid range. I'm thinking these plugs are doing it and am gonna put new BR9ES plugs back in because it is the only thing that changed....
I run the REV1 RK Tek drop in kit 13.1:1 head with Rooster weights, 5.6 heel, 4.5 mid for 66 grams @ 2500-5000'. I was considering adding another 1 gram to the mid but the sled wasn't DET before with the weights at this elevation. It does rev up to 8550 at the lower elevation but I just take it east to get the to the higher elevation and then is revs 8450 all day long.

Your thoughts???

 

[rmscustom]

BPR9ES is what's suppose to be in it.

 

[snowman80]

If it's the 2012 you have in your signature line it should have NGK GR9A-EG. 2012 was the one year wonder that had those plugs in the 800's.

 

[Reg2view]

I will overrev at 8550 on my 11 with a dropin kit. Don't know about the 14 yet. I

 

[ditch1000]

It had the BPR9ES in it. The NGK's were in the tool kit. I never had it hit DET with the BPR9ES before. That being said, I think I'll probably add another gram to the primary also.