CARBS ... ugh

[airborneXS]

I have hashed through so much that the PO did, that I now decided to completely go through the carb job he said he did...the first problem ive found is that the main jets are missing a copper/brass washer.....can i source something locally?.,...more to follow...

[bikerphil]

If you bring the part# listed in the following link with you to your local Yamaha dealer, you just might get lucky...

http://www.powersportsplus.com/parts...153-00-00.html

[SFerinTEXAS]

You are finding out the hard way what most of us know. Never believe the po unless you already know and respect him. That being said, repeatedly referencing the po , once this is known is not does not really help. Bad Form chap. PS, Do not buy a bridge in Brooklyn, I own it. Dig in and get it right. Plenty here to help. You got it now, fix it.

I bought my XJ because the paint job was OE and still pretty nice and the solid OE exhaust. Spent a few months getting the rest right.No complaints.

As far as the washer goes its still available, possibly local.137-14153-00-00

What area in Houston are you?

[skids]

I wouldn't think that the exact washer is that important. Copper is better against corrosion and is a bit softer, but as long as the main jet is submerged, it should be OK. You could probably take it to Ace Hardware and find one that works for a 10th of the cost that Yomamma would charge...

[petejw]

I wouldn't think that the exact washer is that important. Copper is better against corrosion and is a bit softer, but as long as the main jet is submerged, it should be OK. You could probably take it to Ace Hardware and find one that works for a 10th of the cost that Yomamma would charge...

hi skids,
the thickness of the washer would make a difference,
it would either sit closer or further away from the fuel float
level, running richer or leaner.

[DGXSER]

Pete - The main jet is submerged in the gas, the float in the closed position is WELL above the main jet (almost an inch I would guestimate). That being the case, the thickness of that washer will not change how the bike runs IMHO.

[airborneXS]

Im in the nw area of houston, near the woodlands....ive got a few ideas for the washers...something else i just saw, the idle mixture screw, thank god the tips are intact, however, is there supposed to be some sort of rubber grommet inside the housing? when I took off the screw, there was just the screw and spring...

[DGXSER]

The 78-79 version, where the mixture screw is exposed, only has that spring in there.

On the 80-81 style, where the mixture screw is down inside the tower, has a metal washer under the spring with a rubber o-ring/seal under the washer. Well they go on the mixture screw in the order of spring, washer, seal.

[airborneXS]

well i accidentally got these tubes mixed up after i got them out, and thats when I noticed that they arent the same. theres 2 pairs, one pair has 4 holes down each side, then the other 2 has a series of 2,3,2,3 holes.....what goes into which carb?

[SFerinTEXAS]

That washer is od critical,thickness debatable. It has to fit in the main jet bore well. if you could find one that fits there and drill the id for the jet to screw into the emulsion tube then maybe it will work. Call these guys with the part number http://www.houstonyamaha.com/ for a buck and some change I would put the right thing in there. Good chance they have as it is not unique to the XS

[mack]

The ones

with four holes on each side are for the 2&3 carbs.

[bikerphil]

Less holes go in the center 2 carbs. Those holes are air bleed holes, less air = richer mixture to keep the inner 2 cylinders running cooler.

[SFerinTEXAS]

No offense to our northern cousin but the generally accepted notion which I support thru a lot of research is the less holes go in the inner carbs . Less air / more fuel. Some latter models used the same tubes across and richer jets in the inner carbs for the same effect.

[airborneXS]

forgot to post the picture....whoops...lol

[petejw]

Pete - The main jet is submerged in the gas, the float in the closed position is WELL above the main jet (almost an inch I would guestimate). That being the case, the thickness of that washer will not change how the bike runs IMHO.

hey don, its not that the jet is submerged in fuel,
its that the slide needle is tapered and sits into the main jet,
if the main jet sits at a different height to the other main jets,
then that will throw out the fuel mixture compared to the
other jets.


hope that makes sense.