As some of you guys know, my 78E went to a new home, where it was almost completely restored to a level I never thaught possible.
Anyway. the bike went to a friend who lives near-by. We swapped the bottom half of the engine case, replaced some cogs in the tranny, put some new seals in, the engine was sandblasted and painted,....
With all that the carbs were cleaned to perfection, they also got new intake rubber manifolds and new diaphragms.
We set the float height per factory instructions, so are the main jet needles.
All jets are stock, so is the airbox and air filter. Exhaust headers are custom made 4-2 with x-over.
Pilot screws... were a bit of a problem. Long time ago someone screwed them in too tight and the tips broke off. I had to hammer them out and did some damage to the inside of the carb. It was the only option back then, but there we are. I got new screws, put them in and set to what felt right and rode the bike for quite some miles without hassle, only a bit high fuel consumption (24 mpg vs 31 on my other XS).
Now, when he was doing the cleaning etc etc, we completely dissasembled the carbs, put them back together and synced them, set the idle screws in till it almost died, turned them out till it worked real well and half a turn extra out.
Re-synced the carbs, set the idle screws so the vacuum gauge needles would rise to the same level when given some gas, and dropped in sync when it dropped to idle.
Re-synced the carbs again.
The annoying thing:
Doing anything with #1 idle jet screw had no effect. At all. Fully in ran just as fine as anything.
The bike stutters up to 3k rpm under acceleration, above that is OK.
Heres the plugs:
So, any ideas?
Anyway. the bike went to a friend who lives near-by. We swapped the bottom half of the engine case, replaced some cogs in the tranny, put some new seals in, the engine was sandblasted and painted,....
With all that the carbs were cleaned to perfection, they also got new intake rubber manifolds and new diaphragms.
We set the float height per factory instructions, so are the main jet needles.
All jets are stock, so is the airbox and air filter. Exhaust headers are custom made 4-2 with x-over.
Pilot screws... were a bit of a problem. Long time ago someone screwed them in too tight and the tips broke off. I had to hammer them out and did some damage to the inside of the carb. It was the only option back then, but there we are. I got new screws, put them in and set to what felt right and rode the bike for quite some miles without hassle, only a bit high fuel consumption (24 mpg vs 31 on my other XS).
Now, when he was doing the cleaning etc etc, we completely dissasembled the carbs, put them back together and synced them, set the idle screws in till it almost died, turned them out till it worked real well and half a turn extra out.
Re-synced the carbs, set the idle screws so the vacuum gauge needles would rise to the same level when given some gas, and dropped in sync when it dropped to idle.
Re-synced the carbs again.
The annoying thing:
Doing anything with #1 idle jet screw had no effect. At all. Fully in ran just as fine as anything.
The bike stutters up to 3k rpm under acceleration, above that is OK.
Heres the plugs:
So, any ideas?
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