AussieSteve
Active Member
I haven't seen any other posts regarding this.
Today, I tightened the top cap of the carby on my 66cc engine's NT carb,( a bit tighter than usual using a 22mm open-end spanner), after adjusting the needle height and went for a quick spin only to find that the slide was jamming full open. (To make it worse, it didn't happen immediately, but waited until I was a couple of miles from home. I got home with minimal pedalling by starting it and hitting the kill swich when it got revving too high. Then, when it slowed enough, dumping the clutch again.)
After getting it home, I pulled the carby off and checked it out but there's nothing visibly wrong - neither the cap nor the carby is distorted. The slide moves freely until the top cap is tightened fully, then jams. Even loosening the cap by 1/4 turn solves this. It appears that the inside of the cap goes off-round near the top.
Tomorrow, I'll make a thick gasket for inside the top cap, to stop it tightening as far and see what happens.
Anyone else struck this?
Boy, these things really are a learning experience, aren't they?
... Steve
Today, I tightened the top cap of the carby on my 66cc engine's NT carb,( a bit tighter than usual using a 22mm open-end spanner), after adjusting the needle height and went for a quick spin only to find that the slide was jamming full open. (To make it worse, it didn't happen immediately, but waited until I was a couple of miles from home. I got home with minimal pedalling by starting it and hitting the kill swich when it got revving too high. Then, when it slowed enough, dumping the clutch again.)
After getting it home, I pulled the carby off and checked it out but there's nothing visibly wrong - neither the cap nor the carby is distorted. The slide moves freely until the top cap is tightened fully, then jams. Even loosening the cap by 1/4 turn solves this. It appears that the inside of the cap goes off-round near the top.
Tomorrow, I'll make a thick gasket for inside the top cap, to stop it tightening as far and see what happens.
Anyone else struck this?
Boy, these things really are a learning experience, aren't they?
... Steve