can i use a sparks +6 key?

[TeeRX400]

Im wondering if it would be a good idea to put a sparks +6 key on my 400ex. My performance mods are

Stock bore 10:1 wiseco piston

Stage 1 hotcam

Supertrapp slip on

Uni filter w/ no lid

TC Racing engines revbox

[honda400ex2003]

I would say if you run 91 or higher you will be fine. i am not sure on the rev box though, i dont believe that it makes teh timing advance though so you should be good to go. steve

[TeeRX400]

Yea I never run anything lower than 93oct. Only reason I was wondering was becuase it said not to be used on high compression not that 10:1 is much higher than stock though.

[Eviltanker]

you should be ok. If you get excessive heat pull the rev box

[Wheelie]

10:1 compression and a sparks key will NOT be safe on pump gas.

My 02.

[rob_990]

Originally posted by TeeRX400
Yea I never run anything lower than 93oct. Only reason I was wondering was becuase it said not to be used on high compression not that 10:1 is much higher than stock though.

they consider high compression anything over 11:1

[TeeRX400]

Yea I know that but I was just asking because sparks say only use on stock compression but I have 10:1 which is not much higher.

[MAD400EX]

You will be ok, I got it in my 400ex Stock Bore 10.1 Compression piston
and hot cam stage 2 in it, And Sparks rev box.