What causes this?
The needle on my Mikuni vm 22 went to the dogs.
The carb probably has about 200 dirt road miles on it.
I've been pulling my hair out trying to get it adjusted, and it's no wonder why now. A nice little grove was formed around the pointed end of the needle. But what causes this?
Strangely, this is the first float needle I have seen that is not rubber tipped, it's just brass on brass, with a pin and spring inside the float tab end of the needle.
I know gas flowing past it couldn't possibly wear out brass.
I've had problems with this carb since almost day one.
Maybe it was damaged during shipping?
I ride somewhere around 30-40 mph on some severely wash boarded dirt roads. Could all the vibration wear out a needle?
Does it get hammered into the seat on each bump?
The floats float, that is, they aren't filling with gas.
I just replaced the needle and seat, (at ridiculous pricing) and am starting all over going through the process of trying different jets and tuning to get it right, but it's stupid if it's going to wear out every month or so.
I welcome your thoughts with open arms.
Thanks.
Joe
The needle on my Mikuni vm 22 went to the dogs.
The carb probably has about 200 dirt road miles on it.
I've been pulling my hair out trying to get it adjusted, and it's no wonder why now. A nice little grove was formed around the pointed end of the needle. But what causes this?
Strangely, this is the first float needle I have seen that is not rubber tipped, it's just brass on brass, with a pin and spring inside the float tab end of the needle.
I know gas flowing past it couldn't possibly wear out brass.
I've had problems with this carb since almost day one.
Maybe it was damaged during shipping?
I ride somewhere around 30-40 mph on some severely wash boarded dirt roads. Could all the vibration wear out a needle?
Does it get hammered into the seat on each bump?
The floats float, that is, they aren't filling with gas.
I just replaced the needle and seat, (at ridiculous pricing) and am starting all over going through the process of trying different jets and tuning to get it right, but it's stupid if it's going to wear out every month or so.
I welcome your thoughts with open arms.
Thanks.
Joe