Vital Question For Vital Mechs

Related:
Create New Tag

3/5/2018 2:41 PM

My 2015 Yamaha is leaking fuel out the carb overflow when the fuel is on. I'm sure it is the needle and seat. I see the needle for sale on the schematic, but does that include the needle seat?

|

3/5/2018 2:53 PM

I would make sure your seat is sealing before you go replacing it. If it seals then you just need to adjust your float height

|

3/5/2018 2:53 PM
Edited Date/Time: 3/5/2018 2:55 PM

yz125? yz250?

If it's a YZ250, looking at the parts fiche it's just the needle. The seat doesn't look to be sold separately
If it's a 125 then yes it is sold as a set

|

2017 RMZ450
2005 YZ250-sold :,(
1998 YZ250
2005 KX250F

80% of the time it works every time
IG @2HRacing
Thanks to : Factory Effex, N2Dirt, Acerbis, DT1, Fasthouse, Matix, FMF, ASV, 100% & Mika Metals

3/5/2018 3:25 PM

if its a keihin then youre not gonna be able to replace the seat. Mikunis you can do both.

I would air check the needle to ensure its wrong first and possibly adjust float height to remedy the leak.

did this leak happen suddenly or after sitting for a long time?

|

3/5/2018 3:53 PM

Thanks guys. It has been sitting for a bit. It's a smoker 250 with the Keihin carb.

|

3/5/2018 4:02 PM

Harry Backmon wrote:

My 2015 Yamaha is leaking fuel out the carb overflow when the fuel is on. I'm sure it is the needle and seat. I see the needle for sale on the schematic, but does that include the needle seat?

Give this a look... hope this helps.

https://www.jetsrus.com/carburetor/carb_keihin_PWK33-41_carb_exploded_view_parts.html

|

3/5/2018 5:17 PM

In almost 40 years as a MC mechanic I typically only needed to clean debris out of the carb and seldom had to replaced parts.

|

3/5/2018 6:26 PM

Tap the body of the carb with blunt end of a screwdriver and see if it stops

|

3/5/2018 7:12 PM

Has the bike been sitting for a while?

|

3/5/2018 7:13 PM

Check to make sure there's not a styrofoam peanut stuck in the float bowl.

|

3/6/2018 4:51 PM

slipdog wrote:

Check to make sure there's not a styrofoam peanut stuck in the float bowl.

Damn you Slippy! smile

|