Bike bogging.. do I need to re-jet for high-altitude?

[veeref]

In the 3 weeks I've owned my bike, I've noticed that if I run 1 gear too tall (i.e. I'm in 3rd when I should be in 2nd) and am below 3k RPM's - the bike starts to bog heavily, until I run the RPM's out.  I've talked with a bike tech here in Denver, and I suggested maybe the carb's needed cleaning.  He mentioned that since we live in high altitude here in Denver, the bike's running too lean, and probably needs to be re-jetted for altitude (something he doesn't think the dealers do here).  What do you guys think?  Our bike's don't have mixture screws (right?)  So the answer would be to re-jet, I'd think.  They would charge me somewhere around $200 including the cost of the jet kit.

Regards,
Randy

[MarkusN]

The GS doesn't like to be lugged below 3000 rpm. Leaner jetting does make it somewhat less prone to chugging, but the solution really is downshift. (Actually make that at least 4000 rpm if you wnat to see any serious power.)

I can cruise at 2500 rpm in the flat, but as soon as I have to demand the least bit of power at those speeds (50 km/h, roughly 35 mph) I have to downshift at least two gears.

[Egaeus]

Err... wouldn't thinner air make a bike run rich?

And listen to MarkusN.  The GS isn't a Harley.  It likes to be revved.   

[gsmetal]

The answer to your question is YES.

It does need to be rejet.

[veeref]

Err... wouldn't thinner air make a bike run rich?

And listen to MarkusN.  The GS isn't a Harley.  It likes to be revved.   

Uhh... yeah, I meant too rich. 


I've got to get out of the habit of shifting this thing like my car I guess.  I kind of drive like a grandma and shift my Toyota Matrix at 3-4k all the time. Probably explains how I can get 60MPG out of my GS. Thanks again, guys.