[Outlaw]

I am headed to Colorado out of the Texas heat - whew - and will be riding at 9,000' in the cool mountains. What do I do about jetting? I don't want to get too complicated I just want the bike to run well.

2009 CRF 230F -- Not a lot of hours on it.

Thank you,

Paul

[crfsonly]

I am headed to Colorado out of the Texas heat - whew - and will be riding at 9,000' in the cool mountains. What do I do about jetting? I don't want to get too complicated I just want the bike to run well.

2009 CRF 230F -- Not a lot of hours on it.

Thank you,

Paul

paul...heading to higher altitude where there's less air will richen your jetting. so, if the jetting is spot on now you should take jets to move down one level. that should be good enough. enjoy colorado riding. never ridden there myself but from the photos and descriptions it sounds awesome.

ken

[Casey303]

I just bought the power up kit then i started reading all these posts about jetting, i am trying to learn how to do all of this stuff and was wondering if the power up kit will work in the high altitude? or if is comes with the wrong jets.

[Leardriver]

The rule of thumb is one main jet for every 2,000 feet altitude change.

The problem with that is that the stock jetting is a size or two lean already.

So, If the stock main jet was a 98, and you open the airbox and exhaust a little, you should be at a 102 or 105 main at sea level

At 9,000 feet in Colorado, a 95 will run fine all day long.