Input needed: carbs, fuel, timing or valves?

Narrowed it down to the right cylinder, that side was not firing right, be it carb or spark, but I pulled the air filter to start messing with the carbs, started her up, and under throttle I could cover the right carb and she will barely stall or not stall at all while if I do the same to the left, she will stall.

First thing last, checked the spark. Plugs looked completely different, left jug looks to be running, right jug plug was black. Not oil black, just black like carbon. These are new plugs. Checked spark, really weak and intermittent on the right side, left good. So I swapped plugs to see if it is coil, nope, problem followed the plug. Cleaned the plug, still hardly any spark. Took a plug out of my triumph and BLAM! Fired up and runs better than I ever realized.

Moral of story: don't always trust new parts to be good.
Second moral of story: don't start new threads until you've tried some basic stuff out yourself.

Thanks anyways guys!

Well, we all probably benefited from your issue. Nothing goes understood unless we see it first hand.

Thanks for the final report. Glad it fettled out. Is that proper Brit?

Dave
69S

DogT said:

grandpaul said:

You don't need to remove the pinion to verify the alignment of the marks...

Click to expand...

But to change it?

Click to expand...

Nope, you only need to remove the cam drive.

I had a similar problem on the left cylinder last summer. Bike ran weak, cylinder wasn't firing consistently, plug was black sooty, seemed like weak spark, but when I put a new plug one in, it would be ok for 50 miles or so then it would go back to running poorly on that cylinder. I replaced the old Amals with new ones and problem solved. Running good 2000 miles later. Maybe your Amals are worn out?