10drum
New member
I've been attempting to get this 71 R75/5 dialed in. The right plug indicates rich. I rebuilt the carbs, but did not change the jets or main needle. Floats and float needle, diaphragm, and gaskets. It takes about 10 miles of riding before she's completely warmed up, then the idle settles in. I can synch the carbs, and it runs pretty good for awhile, then the right carb starts running rich again. I usually build British Bikes, and these carbs behave like a set of amals with worn sleeves/slides. I am wondering if the left carb was replaced sometime in the past, see photo. Would it be worth it to replace jets and/or needles? Can the slides or sleeves be worn? Both pistons act the same when I lift them and let them drop. Amals are less than $400 for a set, and if it had amals, I just replace the set. $1200 is a little steep for a set of bings. I'm open to suggestions. I have also done a top end, the compression and timing are good. Thanks for all replies. Phil