406 10-1 sparks key

[logant14]

406 with a 10-1 piston and key i have air scoops but i do some slow trail riding sometimes and was wondering if it would run hot

[3400ben]

No it won't run hot.

[honda400ex2003]

as ben said it will work. should be alright with the heat too. I ran 416 with sparks key 10-1 for a long time with no ill effects. maybe 10 degrees warmer when really going slow but nothing to worry about thats for sure. steve