Kawi2strokes.com Forum

John - you are right. I was jumping to conclusions on the purpose of the tubes. They are definitely connected to the enrichener system. I have verified that the pilot jets are clean and the pilot system is all clear by spraying cleaner through and witnessing it spray out of each hole. Even though I can not find an obstacle, all symptoms point to the pilot system. I just can't find the problem.

I may put it together again tomorrow and give it another try. Any more suggestions?

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Rotortech
Indianapolis
1974 S3

I like to take a strand of fine wire, like one strand of a piece of stranded hookup wire, and run it through pilot jets while they're wet with carb cleaner. They can pass liquid, but still have a coating or small piece of rust stuck inside that doesn't seal them completely. I know I'm grasping at straws here, but if the carbs are still apart...

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If it surges, that's normal, upshift.

Yes, they are apart and I have wire from guitar strings that cover a pretty wide range of diameters. I will massage the jets with the wires. I even probed out the cross drilled holes in the jets to make sure they were open. But I did not push the largest possible wire through the holes.

Here we go! (Thanks Jim)

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Rotortech
Indianapolis
1974 S3

And the air bleed hole in the back showed clear?

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Twist the throttle, tilt the horizon, and have a great time. What triples are all about...........

John,
The thru hole in the jets is clear. The cross drilled holes in the jets are clear. The hole in the body that intersects the hole that the jet sits in is clear thru to the pilot screw hole. The hole in the back facing upstream that intersects with the pilot screw hole is clear. There is another tiny hole that comes out of the main bore at the bottom at an angle that shoots fluid toward the intake port - that one is clear. All three carbs are in the same condition at the moment.

I have probed out the holes with wires, sprayed carb cleaner and blasted with air. I am soaking the pilot jets now trying to remove any corrosion or film that could coat the ID. The last time I worked on a bike that resisted my persistent efforts, I eventually found out that a small part was missing from each carb. I checked the parts fiche and I have all the parts shown for this carb.

Suggestions? I am not in a hurry to put this back together so I will happily check anything that you guys suggest.

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Rotortech
Indianapolis
1974 S3

The only other thing I can think of right now, is throw in new plugs, and ride around in the "crappy" zone for a few miles, then take a look at the plugs.

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Twist the throttle, tilt the horizon, and have a great time. What triples are all about...........

Thanks John. That is sort of what I have been doing. I will let you know what happens next.

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Rotortech
Indianapolis
1974 S3

Yes!
Use copper wire, it's softer than (or close to) the metals you're running it through and not likely to affect the jets or passages.

NO!
I would not use a hard or stiff wire like stainless, music wire or the like, you are likely to scrape small shavings of brass or aluminum from hitting the side and possibly create burrs that could come lose and get into the works later.



Edit: Oops, I see I'm a little late. Just my take on the "wire probing" thing though, take it as you like...

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We don't need no stinkin' Cams!

TPS - I hear you loud and clear. I use the stainless wire to probe out the holes in the carb body. I also use it in the jets to sort of burnish the ID with the smooth wire OD. I have used monofilament to poke the junk out of jets before. Anyway, I haven't been abusing the inside of the jets with the hard wire.

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Rotortech
Indianapolis
1974 S3

John,

I did not understand your exact terminology when you posted this. I was scratching my head and decided to study the VM carb manual. I looked at the pilot system and tried to account for every part of it on my carbs. Then I saw the AIR JET on the schematic. I didn't clean one of those on my carbs - so I went looking for it. It is located on the inlet side at the 6 O'clock position. As you know, it is a tiny jet that is pressed into the housing in a deep hole. They were clogged. Smoking Gun!

Thanks for all the help and great suggestions. I expect this baby to run much better now.

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Rotortech
Indianapolis
1974 S3