Honda Benly 99% there

Been beetling around on the CD200 Benly I bought recently. It still
strikes me as being remarkably quick, for a Benly.

Originally all the carb, valve and ignition settings were to ratshit.
Because it's running pattern pipes which are much less restrictive
than OE Honda, though they look identical, and K&N airfilter foam
sheet in the air box instead of the genuine Honda foam, I reckoned it
was running a tad on the lean side.

Symptoms were a marked unwillingness to tick over and it had a
tendency to cut out...

Anyway, the pilot air screw is in the bottom of the carb float bowl,
right up against the block, and I opened it out about another half
turn (2 turnes standard) and raised the carb needle one notch.

It's now *much* better. However, it still takes a few seconds for the
tickover to settle. If you stop at the lights and snick it into
neutral, the tickover is initially very slow and then, after a few
seconds, it picks up and settles to its normal speed. But before it
does that, there is still the occasional risk of it cutting out.

Now, I reckon this means that the pilot setting is still a shade weak.
Anyone want to confirm or refute this?

 

*shrug*

I didn't understand a word of that, but I've saved the post and I hope
that sometime between now and 12th March it'll all make sense.

 

In

When you come to a stop and the tickover slows > speeds up >
settles could this be the floats set a lttle too high allowing a
little extra juice to "slop" in when you brake?


--
Steve Parry

http://www.gwynfryn.co.uk

http://wrexhamseals.tripod.com

 

No

 

I'd normally say a slight air leak, on the engine side of the carb.

But, darsy's CD was a pest to set up initially. Although it has
apparently improved with use.

In light of that, if yours has been underused, don't worry about it. Put
some miles on it but keep an eye on the plug from time to time. It could
simply be a case of varnish/gum in the carb.

 

Hm. Possible.

 

To be fair does anyone fully understand the buggers.

 

I hope to understand them a venturi...

 

*Nice*

 

I'm coming over all emulsional here ...

 

I find myself constantly depressed by some peoples ignorance ...

 

Thus spake Pip unto the assembled multitudes:

Don't fuel the controversy...

 

....someone might get the needle.

 

Well, whatever floats your boat.

 

<sharp intake of breath>

 

This thread is choking me up and I have butterflies in my tummy. We should
let it slide before the laughing gives me a pain in the diaphragm.

 

Thus spake Hog unto the assembled multitudes:

Right... (fx: rubs hands)

I gas there's more in the pipeline as we all get busy hunting for more,
before the thread finally stalls (or it's throttled) and we've no more in
reserve. My sister Petra'll ask my brother filter have a go.

 

Having the fuel/float height too high and rectified by weakening the
mixture with the air screw to enable a steady tick over would have a
similar effect.

When running a a large throttle opening the engine's OK as the part of
the fuel flow control comes back to the size of the float needle valve
'jet'. As you shut the throttle and quickly disengage the drive from the
engine, the engine tries to adjust to the rising fuel level in the float
bowl. First it starts off running weak and speeds up, then as the fuel
level rises the engine settles down to the 'artificial' high fuel/air
screw mix tick over that was set.

Set the float height up correctly and the effect should go away.

HTH