Cylinder Head schematic Honda Cb750ka 1980 Four (ireland Police)

Smoky exhaust on the overrun, or after ticking over, probably a worn valve guide, replace with genuine Honda, and preferably replace the valve at the same time, and restore full performance, and low or negligible oil consumption.

Keep that handsome double overhead cam engine running properly, by using only a genuine Honda Cylinder head gasket. All gaskets are important, but the head gasket not only stops oil leaks, it ensures full compression is maintained, and the petrol/air mixture is not weakened by a leaky gasket. Essential for top performance

All plastic and rubber items exposed to heat, pressure on road dirt, and will sooner or later degrade to the point where they are no longer effective, in this case to reduce heat and vibration going through to the carburettors. The simple answer? Replace them with new Honda items.
For other items you may require, why not check out our online catalogue and 'parts list' fiche, you will be surprised at how many items you may have overlooked!

Once these items become hard and brittle through age, heat and general use, their anti vibration, and thermal insulation properties are dramatically reduced, the simple answer to restore your carburettor equilibrium is to replace with new.
You might like to check our online catalogue covering your model, and ensure you the other parts you need the matching insulators and perhaps a new air filter?

If you are replacing your carburetor insulators, then why not complete the job, and fit a new Honda clip. Nothing looks worse than new rubber or plastic held in place with a rusty, dirty old fitting!
Check our online catalogue for other consumables and spares to make your Honda feel as special as it was when it left the factory!

Specify GENUINE HONDA bolts and you will be fitting the very highest quality items that will be both easy to fit and enjoy long term durability - Other makes of fastener may be just as good, or they may not!
Another related bolt you may wish to order:

90004ML7000

One of those parts that should be renewed whenever you need to remove and replace the item - Thankfully inexpensive enough to keep a few spares!
For any other items you may require for this area of your Honda, check out our on-line schematic for your model and make sure you order ALL the parts you need to complete your task in one shipment, saving money and time later on!
You may be interested in these related parts:

90441425000
90441706000

A new genuine Honda 5mm WASHER is a guarantee the correct grade of materials used in the manufacturing process.
For other new parts to make your task easier and with better results check out our on-line schematic for your model.

Service consumable that should be automatically replaced when overhauling your Honda.
To find all the consumables and parts relating to your Honda, check out the on-line GALLERY for your model, or where applicable the on-line SCHEMATIC. You can then specify a more comprehensive order through our user friendly purchasing system with competitive pricing and prompt delivery!

Specifying only genuine Honda screws means buying parts made in Japan to Honda quality control standards - Screws that were deemed good enough by the factory when the machine rolled off the production line.
This is the 5 x 20 PAN-HEAD SCREW(G)

Buying a new spark plug from CMS will mean, provided the correct part number is specified, you will be getting the correct item that will work in your machine perfectly. No guessing, no taking chances with plugs that may fit, may have the correct reach, but also may run too hot or too cold!
This is the DR8ES SPARK PLUG.

This vital part in the ignition system carries out one basic task, to convert the high voltage delivery from the coil to an ignition spark.
Replacing this part would normally be carried out during the course of contact breaker points renewal, or within the specified service interval when used in conjunction with a CDI system.
For all your electrical consumables, such as ignition coils, condenser, contact breaker assemblies, regulator/rectifiers and much more, check out the on-line Gallery for your model.