Funny you say that. I first had put those new aftermarket float needles in but then took them out again when doing the float hight as their spring tension was much higher and this made me doubt them.
Good news, everything seems to be working now.
First thing I did was measure the float hight of carb #2 and lo and behold, the height was way too low, so this was probably the reason for what happened yesterday.
I suspect how this might have happened. I set the float hight by holding the carbs slightly angled standing on it's side. It seems that when carb #2 was on the bottom side, the angle quickly became too steep so today I turned the carbs around so that #2 was at the top.
At that point, I decided to follow Pat's advice and raise the float hight from 14mm to 14.5mm and reset all the floats.
But the fun wasn't over:
After putting everything back together, I started the bike and it immediately revved up to 6000 rpms without any use of the throttle. I quickly switched it back off. I tried a few more times but it was the same. Choke made no difference.
I checked the throttle which was fine and even unhooked the throttle from the tensioner on the carb side. I turned the idle all the way down. Still the same.
At this point I was truly overcome by joy and in my mind composing my next message to you.
The only thing I could think of was the TPS. Since I had switched carbs it sure must have been way off. So I checked the TPS and the display gave me 10.000. I set it to 5000. By now the bike was turned off for a few minutes and when I turned it back on, it ran fine. I just had to set the idle back to the right setting.
I can't imagine the TPS being responsible for this behaviour (as there was also no problem yesterday) but nothing else changed. Any idea what might have happened?
It was about to rain and dinner time came close but I was able to do a 5 minute test drive and there were no issues.
Of course, it hard to really say something as the engine was cold and I didn't revv it higher than 4000 rpms but it definitely seemed more snappy (in a good way) and less "lazy" from low down. I can already say that it was definitely worth it.
Thanks so much Mike, and everybody else contributing to this thread, you were really a tremendous help! I will update again once I can do a proper assessment.
Good news, everything seems to be working now.
First thing I did was measure the float hight of carb #2 and lo and behold, the height was way too low, so this was probably the reason for what happened yesterday.
I suspect how this might have happened. I set the float hight by holding the carbs slightly angled standing on it's side. It seems that when carb #2 was on the bottom side, the angle quickly became too steep so today I turned the carbs around so that #2 was at the top.
At that point, I decided to follow Pat's advice and raise the float hight from 14mm to 14.5mm and reset all the floats.
But the fun wasn't over:
After putting everything back together, I started the bike and it immediately revved up to 6000 rpms without any use of the throttle. I quickly switched it back off. I tried a few more times but it was the same. Choke made no difference.
I checked the throttle which was fine and even unhooked the throttle from the tensioner on the carb side. I turned the idle all the way down. Still the same.
At this point I was truly overcome by joy and in my mind composing my next message to you.
The only thing I could think of was the TPS. Since I had switched carbs it sure must have been way off. So I checked the TPS and the display gave me 10.000. I set it to 5000. By now the bike was turned off for a few minutes and when I turned it back on, it ran fine. I just had to set the idle back to the right setting.
I can't imagine the TPS being responsible for this behaviour (as there was also no problem yesterday) but nothing else changed. Any idea what might have happened?
It was about to rain and dinner time came close but I was able to do a 5 minute test drive and there were no issues.
Of course, it hard to really say something as the engine was cold and I didn't revv it higher than 4000 rpms but it definitely seemed more snappy (in a good way) and less "lazy" from low down. I can already say that it was definitely worth it.
Thanks so much Mike, and everybody else contributing to this thread, you were really a tremendous help! I will update again once I can do a proper assessment.