Rejetting for altitude

[20774]

Actually, Bing's response in their book is that the carbs respond to air velocity and not the weight or density of the air. So, the air flow is the same through the carb and the metered gas is the same. But with the air to gas ratio (in terms of density) changing, you begin to run richer at higher altitude, with no other changes.

I also thought it might have to do with the slide not rising as high due to the lower vacuum that would be created. But if the vacuum is created strictly by the velocity of the air rushing by and not the change in density, then maybe the slide continues to rise to typical heights.

 

[radar41]

Bings and High Altitude

I'm planning on making a ride through New Mexico in a couple of weeks on my '93 R100GS. Being a North Texas flatlander the bike is jetted for the 700 ft altitude here. Since I'll be riding between 5000 to 8000 ft in New Mexico is rejetting recommended? If so, what do I use?

I live at 5000+ feet and the Bing's on the RS have stock jetting. Discussed it with Bing when I rebuild them and we decided, (as many have already said), the Bings do a fine job of compensating for the altitude.

Yep, sometimes I'm in lower gears with the "r's" up, but the RS doesn't seem to mind.

Just Ride It and enjoy the mountains!!!