Honda-SOHC

When I get a chance I will check the upgrade parts against the standard parts and see what the difference is.

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International Standard is £5.45, no, or very little import duties will be payable. I send parts to EU regularly and never have issues, especially to France, Norway, Sweden and Denmark import duties are high.
As far as quality, something you pay £4.00 for is going to be substantially less reliable than a Honda OEM part. A lot of people sell car oil pressure switches for bikes but the pressures are different. Cheap Chinese shite is renown for not being very good, where OEM Genuine Honda oil pressure switches are tried, tested and reliable.
It's up to you Alex.

Ha Ha ...what brand of chocolate are the Cruzin sprockets made of Roy 

Just checked the carb parts, Ash's upgrade kit versus Cruzinimage K0 set. The needles mike up differently but are the same length, the drillings in the emulsion tubes are a different pattern and possibly different hole sizes. I am going to ultrasonic clean the upgrade parts and use them in the 14C build. I have a pair of rebuilt 14H on the bike at the moment but I still think it's running rich. Not really had chance to take it out recently so I could be wrong. Just waiting for some floats to rebuild the 14C then I will know for sure.

Sorry Mo only just catching up with the thread. Been dealing with medical issues, two weeks holiday, the a bike trip to the Isle of Man to scatter my mates ashes. Busy few weeks.

If you have a look at   www.Cruzinimage.net   they have the sprocket and the tank rubbers you need. The sprocket I used was the 68-74 item (35 tooth) and it fit just fine. When you do the search use CB450K leave off the zero or you wont get any results. On this page, don't use any rubber items that come into contact with petrol or oil as they wont last. Don't use the gaskets as they are crap. And for heavens sake don't ask them any questions or they will blacklist you.

I don't think we used the same carb kits as mine were for a K3 and yours K0. Ironically I have two sets from Cruzinimage to rebuild my 14C's so I will get in the garage later and measure the needles against Ash's Honda upgrade parts that I will be using. I will report back later with what I find.