It followed me home!!

baz · Jan 2, 2024

concours said:
View attachment 111847

2 of my carbs are drilled similar to this
1 is drilled horizontal
All have flats filed on them for screws to seal

Fast Eddie · Jan 2, 2024

baz said:
2 of my carbs are drilled similar to this
1 is drilled horizontal
All have flats filed on them for screws to seal

Perhaps drilled like that intentionally to miss something?

concours · Jan 2, 2024

Fast Eddie said:
Dirt in the fuel was my issue ie aluminium dust / residue. More like powder than dust, so fine, but still enough to cause float needle unhappiness.

To tidy them up, I use a very fine abrasive (Mother's Mag here) on the end of a home made wooden dowel (Chopstick, kitchen match) whittled to a point. Polish the seat. Works great.

baz · Jan 2, 2024

concours said:
To tidy them up, I use a very fine abrasive (Mother's Mag here) on the end of a home made wooden dowel (Chopstick, kitchen match) whittled to a point. Polish the seat. Works great.

I use a Q tip with autosol in a cordless drill
If that doesn't work I pull the seat out and replace the O ring

concours · Jan 2, 2024

baz said:
I use a Q tip with autosol in a cordless drill
If that doesn't work I pull the seat out and replace the O ring

O-ring?

Ohhhhhhh, on the OD of the push-in variant.

baz · Jan 2, 2024

concours said:
O-ring?

Yep but this was on my fj1200 CV carbs
You can remove the whole needle valve seat
The O rings sit in the recess and eventually crack up

concours · Jan 3, 2024

baz said:
Yep but this was on my fj1200 CV carbs
You can remove the whole needle valve seat
The O rings sit in the recess and eventually crack up

Doin a CV mik on a 500 single right now

baz · Jan 3, 2024

concours said:
Doin a CV mik on a 500 single right nowView attachment 111876

With the FJ two of the carbs just wouldn't stop leaking
So I pulled the float needle seats out and sure enough the O rings were perished

Fast Eddie · Jan 3, 2024

baz said:
With the FJ two of the carbs just wouldn't stop leaking
So I pulled the float needle seats out and sure enough the O rings were perished

Had it happen on modern FCRs too.

concours · Jan 3, 2024

In this case, the o-ring was still pliable.

The viton tip is notched

...and the fuel petcock has failed to shut off.

27 years of service

baz · Jan 4, 2024

concours said:
Nope.
Send the gas directly into the carb throat, engine side of the slide

So as I'm still waiting for the primer kit to arrive I seem to have found the sweet spot for starting !
With all 3 chokes on and throttle just cracked open
Probably about 1 mm it'll fire into life
With the throttle closed there's nothing
But open it anymore than a 1mm it won't fire

concours · Jan 4, 2024

baz said:
So as I'm still waiting for the primer kit to arrive I seem to have found the sweet spot for starting !
With all 3 chokes on and throttle just cracked open
Probably about 1 mm it'll fire into life
With the throttle closed there's nothing
But open it anymore than a 1mm it won't fire

"If it wants a cracked throttle, so be it, just a small amount."

Start with just a half stroke on the primer pull knob.
One kick wonder!

cliffa · Jan 4, 2024

Do those primers have a one way valve in them? If so I reckon it would make a nice manual chain oiler.

concours · Jan 4, 2024

cliffa said:
Do those primers have a one way valve in them? If so I reckon it would make a nice manual chain oiler.

Yes, two check valves.

Before off season layup, we pull the inlet hose off the fuel line tee, put it into a bottle of two stroke oil. Pumping it fogs the engine against corrosion, and ALSO lubes the primer seals so they don't dry up.

baz · Jan 9, 2024

The primer kit has turned up
It doesn't have a check valve so I'm going to tap a feed pipe into one of the float bowls
And mount the plunger above float chamber level
Then tee the engine side feeds into the carbs by the inlet rubbers

concours · Jan 9, 2024

baz said:
The primer kit has turned up
It doesn't have a check valve so I'm going to tap a feed pipe into one of the float bowls
And mount the plunger about float chamber level
Then tee the engine side feeds into the carbs by the inlet rubbers

Check valve is built in.
Otherwise, they would flow continually under vacuum

baz · Jan 9, 2024

concours said:
Check valve is built in.
Otherwise, they would flow continually under vacuum

That's what I was thinking
But this doesn't appear to have one
I can blow both ways into the feed and return
I will check by teeing into one of the fuel pipes first

concours · Jan 9, 2024

Since forever ago, they've been made in Taiwan, sold aftermarket & OEM.

https://www.denniskirk.com/kimpex/universal-plunger-primer-379105.p178308.prd/178308.sku?gad_source=1&gclid=EAIaIQobChMIn5j9sK3QgwMVgldHAR39RQyMEAQYASABEgI9ovD_BwE

Spray some WD-40 in it for further testing.

baz · Jan 10, 2024

concours said:
Since forever ago, they've been made in Taiwan, sold aftermarket & OEM.

https://www.denniskirk.com/kimpex/universal-plunger-primer-379105.p178308.prd/178308.sku?gad_source=1&gclid=EAIaIQobChMIn5j9sK3QgwMVgldHAR39RQyMEAQYASABEgI9ovD_BwE

Spray some WD-40 in it for further testing.

That's identical to what I have
I haven't had time for proper testing
But I fitted a short piece of hose to inlet and filled it with lighter fluid
And it ran straight through

concours · Jan 10, 2024

baz said:
That's identical to what I have
I haven't had time for proper testing
But I fitted a short piece of hose to inlet and filled it with lighter fluid
And it ran straight through

I keep a spare on hand, I'll check it. Maybe it needs vacuum to seal?
I'll pull on it with the Mityvac

It followed me home!!

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