Help, summit 800 backfire?

[synergycycle]

Swaped out the plugs. runs like a champ now. what is the proper plug to put in there?

 

[magnet]

i am sure it would be a br9es or eix depending on how good of plug you wanna buy.

 

[whammy]

Br9ecs......

 

[Shredder]

back it out of the garage

Then what..............put it in forward and drive it back in.........put it in reverse and back it out................repeat until the end of November.