My float seat still lets fuel through on my 250R

[filipinoredneck]

Well, the previous owner did a good job cleaning the carb alright. There is groove in the side and on the rim I can't get out. I'm at the point i'm doing more harm than good. I tried bending the tab on the float but will still let fuel through. The float is good. No holes and no fuel inside. I heated around the area to try and expand it to take out the float seat, but the press fit is too good. I tapped a ball bearing to try and fix the seat but the whole brass seat sunk about 1mm already. Now the float plunger has to come up 1mm higher. I think I have no choice but to scrap this carb and buy another. I don't think that they sell this part anywhere. Seating depth is important and also orientation due to the angled port hole on the side. What do you think guys. Am I ****** or what. Anyone have a carb lying around collecting dust??? LMK

[edog]

Did you rebuild the carb?

[erectordale]

If you replace the float needle it normally will fix this without changing the seat

[filipinoredneck]

I did rebuild the carb, but the float needle that came with the kit was steel and didn't have a rubber tip on it. It was worse than the old one. there is a small groove on the inide wall. there is no way the steel tip would seal that. The rubber tip would seal it better but would leak gas when the trike would sit without the engine running. I didn't notice it leaking while I was riding. I was too excited to notice anyways. I'm pretty sure my carb is toast from trying to fix it. FIX AND LEARN.

[edog]

Can you order the NOS float needle to replace it?

[Billy Golightly]

The seats on the Keihin carbs (PWK, PJ, etc) are NOT replaceable. And when they wear out, the carb is more or less junk. A new needle will not fix the problem because the hole is wollered out larger then it should be. Time for a new carb.

[bigreddaddy]

If it were me I would go with another carb, but what if you tried some jb weld or something like that to the damaged area and then use a dremel and grind it to fit?

[edog]

Time for a new carb then.......

[TimSr]

I had the same problem with mine on my R too. I just got used to shutting it off when not in use. It wont cause you any problems when its running. Something I have not tried though, but an idea: With the new all metal needle, try some valve grinding paste to mate a new seat between the needle and seat. If the carb is toast, you have nothing to loose.

[1upfront]

If the seat has been pushed in 1mm then the float will come up 1 extra mm as well as the fuel, and at that point it would start leaking out of the bottom overflow tube on the bowl,that carb is ruined.:(

[phil53]

This is why I switched to mikuni, replaceable float needle & seats.

[filipinoredneck]

I took it to work today. I got the float seat out, and our machinist will be machining me a new float seat tomorow. I had nothing to loose. It was toast. I have also made a drawing. If this works, I will post a thread on this with the drawings and detailed instructions on how I did it. The only tricky part to this is there are 3 ports inside it 1.5mm in diameter. I have to check if they were in a specific angle, also the orientation of those ports in relation to 3 shoulders inside the bore, and the seating depth of the part. I had 2 other coworkers examining this today with me. There's nothing like getting paid time and a half for doing personal stuff. Wish me luck on this.

[4cylinders]

hey, once the old one is out, can't you tap the hole and install some other seat?

[filipinoredneck]

I don't think tapping in one would be a good idea. If you do, you would have to find a way to seal it properly. If there was room for an "o" ring, you would have to make a groove with a boring bar and cut a pocket for it. It's alot of work. I have a new seat made, but I still have to create the drawing and drill the 3 port holes on the side of it before I install it. I'll get to it in the next day or so.

[jason 32]

you could have tried a rubber tipped needle-
i have had this peob before-

i dont think the 3 holes inside matter- just the main hole the fuel comes through- double check the inlet -
i dont think it matters to index it either----

[filipinoredneck]

I had a rubber tipped float plunger, but the previous owner too a screwdriver in there and left a gouge in the side of it. It just barely seats depending on how it seats the rim.