Why are the 2-3 cylinders on my CB750 not firing?

99% of the time if 2-3 are not firing and the plugs are dry then it’s low fuel level in the carb bowls due to slow fuel delivery from the petcock which can effect any carb (s) randomly…… IMHO. If your sure it’s an ignition problem; it’s carbs….

What’s the PSI on a 71 CB750 cylinder?

When correcting the timing we set the point gap to shop spec and points just opening at the ‘F’ mark. Also set the spark plug gap to spec measurement. We pulled out the plugs and each was getting a nice blue spark. Checked the compression (cold engine) and got around 115 psi on all cylinders.

How does a Honda CL77 Scrambler 305 work?

None of this pushrod nonsense, as a single overhead camshaft powered by a chain running between the two cylinders did all the work. With an externally adjustable tensioner. A pair of 26mm Keihin carbs, with excellent air cleaners, put the gas in the combustion chambers, to be compressed 9.5 times.

Who is the owner of the Honda CB77 scrambler?

Owner: John Lundberg, Santa Margarita, California. Here we have the last of Honda’s 305 models, which began with the dry-sump CA76 in 1959, moving on to the wet-sump CA77 Dream in 1960, then the CB77 Super Hawk in ’61, and finally, the model we are dealing with here, the CL77 Scrambler. Nobody seems to know where the 77 came from.

Is the serial number on a CB750K the same?

The serial numbers do not match, but are in the same model series. It is not uncommon to find CB750’s which have a replacement engine from a different model year since engines from all of the CB750K models are compatible with all of the frames.

Who is the supplier for Honda CB750 parts?

Welcome to CB750 Supply. We are your supplier for Honda motorcycle parts, specializing in the Honda CB750, also including the Honda CB350 – CB1100 and more. Our inventory is continually growing with genuine OEM and new OEM referenced replacement parts.

Is the CB750 K6 the same as the K5?

The CB750 K6 replaced the K5 in the US, the K4 in Japan and the K2 in the rest of the world. This model was available in one color, Candy Antares Red and featured light green instrument faces. New gear shift drum, new center shift fork for improved shifting.

Can a coil wire break on a CB750?

The coil power wire (black) can break right at the coil. Most people test the wire at the connector 3 inches away and miss the break. It should show over 11 volts with the headlight on or the starter engaged (under load) Only plugs exposed to a very rich mixture will look wet in a short bit of cranking.

Why are the plugs wet on my CB750?

Most people test the wire at the connector 3 inches away and miss the break. It should show over 11 volts with the headlight on or the starter engaged (under load) Only plugs exposed to a very rich mixture will look wet in a short bit of cranking. It is a fuel vapor in the cylinder and it takes some cranking to get the plugs wet.

Where is the spark Advancer on a Honda CB350F?

The Dyna S is completely housed behind the ignition cover and uses a magnetic rotor with the original spark advancer, so the factory advance curve is maintained. Increases power and reduces vibration, backfiring and intake reversion, especially on engines with radical cam timing. Front and rear cylinder timing may be set individually.

What kind of ignition does a Honda CB350F use?

The Dyna S is a complete self-contained electronic ignition system built with the latest state-of-the-art engineering. This is the same ignition used by top racers over the past 2 decades. The Dyna S is completely housed behind the ignition cover and uses a magnetic rotor with the original spark advancer, so the factory advance curve is maintained.

What do you need to know about Honda CB1100F?

The Dyna 2000 system consists of a state of the art microprocessor controlled ignition module along with an adjustable Dyna dual sensor crank trigger. For the first time you can actually set the ignition timing to what you want to maximize engine performance.

When did the Honda CB750 4 series come out?

The following versions and sub-models of Honda CB750 Four series were available in 1979:

How big is a Honda CB 750 K?

CB 750 K 1 overall length width Wheel base Seat height foot height weight suspension. R. suspension. tire Size, pressure R. R. lining fuel reserve Capacity GENERAL INFORMATION English 85.0in. in, 57-3 in. 12.2 in. 5.5 Double 5.6 in. 1.155m 218 kg Swing travel 3.25-19 Rib pattern. Disk lining swept expanding Shoe, gal. 3.3 mm) (28 psi) air air

What kind of oil does a Honda CB750 use?

Front fork oil Front capacity Cylinder and ran t’ Oke 2.02x24a)in. 44.9 61.0×63.o mm 90: 1

The following versions and sub-models of Honda CB750 Four series were available in 1979:

Can you buy CB750 parts for only one bike?

Only shopping for one bike? Fine tune your Vintage CB750 parts shopping experience! Choose your bike from the list below, and we’ll only list parts that fit the exact model you choose. Can’t find your model in the list?

What was the original color of the cb750k0?

The CB750K0 Four was sold from 1969 to 1970 and was available in one of three colors: Candy Blue Green, Candy Gold, or Candy Ruby Red. The tank, side covers, and upper forks were of the basic color (green, gold, or red).

What are the choke plates on a Honda CB750?

The fronts of the carbs have the silver-colored throttle plates (butterflies), and the rear of the carbs have the brass-colored choke plates. The round tops are called caps and the square bottoms are called bowls. Getting Started

Why are the 2 and 3 carbs not firing?

Checked the compression (cold engine) and got around 115 psi on all cylinders. After all this we started the bike up and still no combustion from 2 & 3 cylinders. When we pulled the plugs on 2 & 3 they seemed dry with no signs of firing other than the spark. Unscrewed the float bowl drain on 2 & 3 carbs and they’ve got gas.

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