jetting for colorado

[rgorm2500]

where do i start for jetting at 6000ft, i got a 155 or something main jet, with a 25 pilot jet or air jet dont remember exactly what it is till i take it apart again. i need to let more air in the mixture right because it is thinner, or am i going about this all wrong.:confused:

[twincat800]

Your best bet is to start from there. Look up old forums on how to tune the engine. and how to get to the fuel screw.