1988 Paso 750 finally running with the Weber
Posted: Mon Feb 14, 2022 1:10 am
To my great surprise my 1988 Paso is running on the Weber. I've posted about wanting to get it back to stock and my subsequent failure at getting it sorted in other threads, but apparently I finally did something right because it's up and running, and quite nicely at that. Keep in mind I haven't actually ridden it yet with the Weber. It's winter here in the Midwest in the U.S. of A, so the weather's not really amenable to riding, even if I am something of a wimp these days. Regardless, it seems to be running very nicely. I've balanced the throats to each other with the air screws and I'm getting a nice, even, maybe just mildly lumpy, idle. Throttle response is really crisp and with the air box in place there's almost no induction noise, which is actually slightly disappointing.
The turning point(s) in getting it sorted appears to center around discovering the throttle shaft was slightly bent and that somehow I hadn't quite gotten all the crud out of the various circuits, despite a good soaking and an ultrasonic bath. Also, in my earlier attempts I hadn't bothered to install the air box onto the carb, which is apparently critical for proper setup and tuning. The carb I'm using is a used one I picked up as the original is damaged. I swapped the throttle shaft from the original into the used unit after yet another soak and ultrasonic bath. I'm using sealed bearings for the throttle shaft.
I set it up with 150 mains, F27 emulsion tubes, 60 idle jets and 4.5 auxiliary venturis. Float set to 43mm and running the stock fuel pump. I'm pretty stoked. Here's a link to a quick video I did of a cold start earlier tonight:
https://www.youtube.com/watch?v=l-c-cb2bcbI
The turning point(s) in getting it sorted appears to center around discovering the throttle shaft was slightly bent and that somehow I hadn't quite gotten all the crud out of the various circuits, despite a good soaking and an ultrasonic bath. Also, in my earlier attempts I hadn't bothered to install the air box onto the carb, which is apparently critical for proper setup and tuning. The carb I'm using is a used one I picked up as the original is damaged. I swapped the throttle shaft from the original into the used unit after yet another soak and ultrasonic bath. I'm using sealed bearings for the throttle shaft.
I set it up with 150 mains, F27 emulsion tubes, 60 idle jets and 4.5 auxiliary venturis. Float set to 43mm and running the stock fuel pump. I'm pretty stoked. Here's a link to a quick video I did of a cold start earlier tonight:
https://www.youtube.com/watch?v=l-c-cb2bcbI