Highest % Berryhills to clean out CV carbs

'87 CBR600, 20k nursed city miles.

I had a bad problem with clogged carbs some years ago after a long winter.
Meticulously disassembled and cleaned carbs. Much better, but still a
little lo-speed miss and iffy idle.

And thats the way it is now, maybe a tad worse. For several winters, I'd
just start and idle the thing standing in the garage for ~15 min. every 2
weeks, with a full tank of gas.

I have priors that disassembling and cleaning carbs would not further help.
Something about these damned Keihins and/or potential changes in US gas
formulations over the years ...

What is (approx.) the highest % of Berryhills to gas that could reasonably and
safely be expected to help with such problems? Note that 1 part Berryhills to
4 parts gas would be 20%. Too much? Too little??

P

"Law Without Equity Is No Law At All. It Is A Form Of Jungle Rule."

 

The usual problem with motorcycles that have diaphragm type
carburetors is that the tiny jets, ports and passages become plugged
up with gum and varnish from gasohol evaporating in the float bowls.

I recommend adding about 4 ounces of Berryman B12 Chemtool Choke and
Carburetor Cleaner or Berryman B12 Fuel Treatment to a full tank of
gasohol two or three times a year.

The Choke and Carburetor Cleaner comes in aerosol form and can be
squirted into the various carburetor ports and passages and jets for
direct cleaning.

In order to avoid removing carburetors from the engine for thorough
cleaning, I will sometimes squirt B12 into the pilot air jet which is
the smaller of two holes in the intake mouth of a diaphragm
carburetor.

This will get full strength B12 into the idle mixture circuits
rapidly.

The Fuel Treatment comes in liquid form in a 15-ounce can and you can
get it for around $3.50 at Wal*Mart.

Use a funnel to pour 4 ounces into the gas tank, since the powerful
acetone, toluene, and methyl alcohol may soften your paint and damage
plastic.

This is only about a 3% solution of gasohol/B12 but it also works
rapidly.

Go for a ride and watch your idle RPM increase.

That shows that the B12 is doing its job to dissolve the gum and
varnish that plague small carbureted engines fueled by gasohol.

Riders who attempt to adjust their own carburetors are often baffled
by their inability do do so.

One would expect that turning the idle knob would raise the idle RPM,
but sometimes this doesn't happen.

Sometimes the engine becomes hard to start or the idle RPM races up
too fast when the engine warms up.

*One cannot adjust a dirty carburetor!*

 

still chasing the kids I see.

 

either or ride it down to half a tank of fuel. Then put the whole can
in and top off the bike and go for a ride. Rinse and repeat at least
one more time....should solve the issues. Also more riding will
prevent any further. issues.

 

Thanks for the info -and- for knowing I *meant* Berryman B12 Chemtool.
Dunno how/why I was thinking "Berryhill's".

P

"Law Without Equity Is No Law At All. It Is A Form Of Jungle Rule."