Yamaha FJ600 32mm Carbs on FZ600 with 30mm carbs

 ok, I have a 86 FZ600 that has Mukuni 30mm stock carbs. I read about
the FJ600 being the same engine, but had 32mm carbs. I realized that
the intake boots for FJ600 are specialy angled to make the 32mm carbs
work. I bought some FJ600 carbs with the boots and put them on my
FZ600 with not much problem other that a tighter fit in the frame, but
they did fit. I have after maket K&Ms so no air box. Now I get a lot
of white smoke and can't get rid of it no matter how lean or rich I
make the carbs. The specs on the FJ600 and FZ600s engine are identical
other than carbs. Any help?

 

Put it back to stock carbs and airbox and save yourself ages of pain.


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If the smoke is really white and dissipates *immediately*, it's water
vapor.

You might have some water in the bottom of your gas tank, or a lot of
water condensed in the exhaust system.

Condensation in the exhaust goes away quickly as the pipes heat up,
but water in the tank will go to your float bowls and cause the engine
to try and gargle gasoline/water mixture.

If the smoke is bluish-white and hangs around for a while, it's *oil*
smoke.

You might have stuck or worn out piston rings or leaky valve guide oil
seals or too high an oil level in the crankcase.

 

If the smoke is really white and dissipates *immediately*, it's water
vapor.

You might have some water in the bottom of your gas tank, or a lot of
water condensed in the exhaust system.

Condensation in the exhaust goes away quickly as the pipes heat up,
but water in the tank will go to your float bowls and cause the engine
to try and gargle gasoline/water mixture.

If the smoke is bluish-white and hangs around for a while, it's *oil*
smoke.

You might have stuck or worn out piston rings or leaky valve guide oil
seals or too high an oil level in the crankcase.

I would tend to agree with .; IIRC being too rich would result in black
smoke with white being water vapor or oil

 

'Sup, Boots?

I'm looking for an *American* manufacturer of this type of boot:

http://www.diggerhistory.info/images/asstd2/jackboots.jpg

Googling for "marschstiefel" just gets me a bunch of suppliers for
Wehrmacht re-enactors...