Hello,
I'll ask you to pardon me in advance if the information I'm after is located elsewhere on the forum as I am admittedly a noob to the site (but now Guzzi's).
I've recently acquired a '75 850 which comes from sea level altitude and I live at approximately 3,500 feet. The bike was running very poorly so I went through and installed electronic ignition and refreshed everything else on the ignition side (plugs, wires, coils). This always seemed to solve the problem with previous bikes, however, I've never lived at altitude with previous bikes. With the timing slightly advanced and mixture screw adjusted, the bike runs ok, but not very well (no power from idle to about 3,500 rpm and generally rough and weak thereafter).
My next step is to re-jet the carbs to a smaller size due to the altitude. However, I'm not sure how small to go. Is there any reference for altitude vs. jet size for these carbs? Any recommendations are appreciated.
Cheers
I'll ask you to pardon me in advance if the information I'm after is located elsewhere on the forum as I am admittedly a noob to the site (but now Guzzi's).
I've recently acquired a '75 850 which comes from sea level altitude and I live at approximately 3,500 feet. The bike was running very poorly so I went through and installed electronic ignition and refreshed everything else on the ignition side (plugs, wires, coils). This always seemed to solve the problem with previous bikes, however, I've never lived at altitude with previous bikes. With the timing slightly advanced and mixture screw adjusted, the bike runs ok, but not very well (no power from idle to about 3,500 rpm and generally rough and weak thereafter).
My next step is to re-jet the carbs to a smaller size due to the altitude. However, I'm not sure how small to go. Is there any reference for altitude vs. jet size for these carbs? Any recommendations are appreciated.
Cheers