Hi, I need some help with this old PW50 I'm trying to get running properly again.
I had most of the bike pulled apart to replace both crank seals so maybe I've put something back incorrectly.
After I warm it up it will idle in the "start" position with no problem but as soon as I switch to "run" it seems like it's running at full throttle or close to it. If I move it back to "start" it will settle down straight away and do the same thing when I go back to "run".
Not sure if it's related or not but there is also some fuel leaking from the carburettor. Not enough to have a constant drip but I notice it when I wipe my finger around it or leave it for an extended time.
Before I replaced the crank seals it used to rev by itself but it was much more erratic than this. I'm not sure but I don't remember the start/run position having any impact on it. The excessive smoke has cleared up now too, so I think both seals are OK.
I think the slide (?) is installed correctly? Turning the handlebars side to side doesn't pull it up at all.
The float needle has a very faint ring around it about 1/3 of the way down from the tip. You can barely see it in person, surprised it somewhat shows up in this photo. The rubber feels quite hard, is that how it should be?
Should that be replaced? If this was letting in excess fuel, could that explain the fuel leaking or is that something else? Also, would the extra fuel cause the bike to rev by itself or would it more likely bog it down?
The only other part in the carb that I can see has damage is this following piece. I can't find it on any parts diagrams so I don't think it's possible to order a new one.
It goes through the hole at the top in that last photo down to the opening at the bottom/side of the bowl. That is the "before" photo, it was the only one I had showing that.
Is the fuel leaking and the bike revving itself possibly related or more likely to be separate issues?
Any ideas for what I should be looking at?
I had been looking at buying a new float needle and bowl gasket but for the same price I can get one of those Miniky copy carbs off ebay. Some people have issues with them but I would be spending the same amount on two parts that I don't even know whether they will fix my problems.
Sorry for the long post, appreciate any ideas people have.
Thanks
I had most of the bike pulled apart to replace both crank seals so maybe I've put something back incorrectly.
After I warm it up it will idle in the "start" position with no problem but as soon as I switch to "run" it seems like it's running at full throttle or close to it. If I move it back to "start" it will settle down straight away and do the same thing when I go back to "run".
Not sure if it's related or not but there is also some fuel leaking from the carburettor. Not enough to have a constant drip but I notice it when I wipe my finger around it or leave it for an extended time.
Before I replaced the crank seals it used to rev by itself but it was much more erratic than this. I'm not sure but I don't remember the start/run position having any impact on it. The excessive smoke has cleared up now too, so I think both seals are OK.
I think the slide (?) is installed correctly? Turning the handlebars side to side doesn't pull it up at all.
The float needle has a very faint ring around it about 1/3 of the way down from the tip. You can barely see it in person, surprised it somewhat shows up in this photo. The rubber feels quite hard, is that how it should be?
Should that be replaced? If this was letting in excess fuel, could that explain the fuel leaking or is that something else? Also, would the extra fuel cause the bike to rev by itself or would it more likely bog it down?
The only other part in the carb that I can see has damage is this following piece. I can't find it on any parts diagrams so I don't think it's possible to order a new one.
It goes through the hole at the top in that last photo down to the opening at the bottom/side of the bowl. That is the "before" photo, it was the only one I had showing that.
Is the fuel leaking and the bike revving itself possibly related or more likely to be separate issues?
Any ideas for what I should be looking at?
I had been looking at buying a new float needle and bowl gasket but for the same price I can get one of those Miniky copy carbs off ebay. Some people have issues with them but I would be spending the same amount on two parts that I don't even know whether they will fix my problems.
Sorry for the long post, appreciate any ideas people have.
Thanks
