SOHC.co.uk Forums > CB350/400

400F carb balancing

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NE0:

--- Quote ---I found that the right side coil had quit on me.
--- End quote ---

before you go and buy a new coil, i had exactly the same problem with a coil a couple of years ago, having replaced it I continued with the same problem, until i traced the fault to the wires going to the contact breakers.

Where the LT cable enters behind the points cover, the insulation had split (but barely visible to the eye) as soon as the cover was back on tight, it pinched it that bit more and grounded the coil, worth checking first.

simple test: take off the points cover, pull the wires away from possibly grounding and try starting the bike!

NE0:
http://www.ebay.co.uk/itm/Car-or-Motorbike-Carburettor-4-Cyclinder-Calibration-Vacuum-Gauge-VGA4-/290763808633?pt=UK_Motorcycle_Parts&hash=item43b2df9f79

This is the same set I use on my 400/4. (although I bought mine in 1985) They are still the same design and spelling for carb!!!

The metal tubes are the same thread and screw straight onto the carbs.

Bitsa (Ralph Wright - RIP):
Agree with oddjod the Honda ones were the best used all of them but contree to some opinions I like the Davida ones.Each to their own.
Cheers
Bitsa

ST1100:

--- Quote from: Oddjob on August 20, 2012, 05:02:03 PM ---... my own tool was "borrowed" by the brother in law and never seen again.
--- End quote ---

You probably have a similar saying over there: tools, motorcycles and women shall not be loaned... to anyone... ever...  ;)

On the 1100cc V4 16V DOHC we normally use a digital vac meter, all bells and whistles with LCD screen, scale and damper adjustments...
Out of interest we compared it with my Carbtune thing, turned out very well, misses RPM indication though...

Tried the clock-style gauges once (the simple ones sold at Louis, etc...), but their hands quiver way too much for any usefull readings (on an inhaling V4... dunno if SOHC engines cause such strong pulses...).

dbscots:
Neo, I will check the wires tomorrow. Tonight I will keep my fingers crossed. It would be nice for a change for a fix to be simple and inexpensive. Thanks for your suggestion. I'll let you know what happens.
dbscots

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