So a bit of analysis using a timing gun reveals no spark on LH cylinder for several revolutions. I only have one gun, so I'll try the RH cylinder in ...

I have now rebuilt both cabs, reinstalled, and set idle mixture and synched the two. Once warm, idles very nicely at about 1000 rpm, and runs really ...

1) Agree- bike was desmogged when I got it, and came from sea level. I'm at 5k feet, so it needs rjetting for a variety of reasons. 2) Cleaning/reb...

Very true- should have been more clear. I cleaned off all the varnish I found; a test start this AM (heads reading 45 degrees F) yielded no improveme...

I went in and made sure idle jets and enricher jets/passages are good and clean. Bowls have significantly less varnish that the above. Unfortunatel...

@8053 100% seems to run on one cylinder for a few seconds when starting. I'll pull float bowls this afternoon and clear the take up tubes. Will repo...

@4949 Since I have owned it, the bike has always been somewhat difficult to start when it's cold weather, or it's not been started for a few days. Al...

Success! I took idle screw and idle mixture screws all back to zero, then set them to recommended starting points. (1 1/2 turns in for idle screws, ...

The bike has an Alpha ignition system installed, so no mechanical points/advance. Going to try and set idle to baseline and try adjusting again.

1 1/2 turns is definitely way too rich, as was 1 turn. I set both to 3/4 turn and set idle screw to 1050. Same result- link to bike idling post rid...

Interesting. I was following William @ boxer2valves guidance- kinda like I set idle on a Stromberg (long time British car/bike guy) I’ll try 1 1/2 t...

Richard- appreciate your ongoing help! - Vacuum ports are still attached to hoses, which I replaced. I do have the screws and washers OTW to replac...

I have gone through and done the above: - Valves - Carb sync - Confirm no ties on throttle cables - Replace idle adj screw O ring - Confirm ...