SOHC.co.uk Forums > CB750

Secrets of a CB750 early K

<< < (5/6) > >>

Trigger:
That is PN 12238-300-300 jet Ash, that is the most common jet fitted from 1971 to the finish.

steff750:


--- Quote ---That is PN 12238-300-300 jet Ash, that is the most common jet fitted from 1971 to the finish.
--- End quote ---
good boy trigg
 ;) we got a mate a rite know it all (we even call him the philosopher to this day) this was in the 70's he had a jock Kerr tuned f1 it was quick at the time but the top end run dry of oil,so he thought he would get more oil to the camshaft
anyways he decided to drill out the oil jets ,on restarting the rebuilt bike it lost the oil pressure to the mains and big ends and was junk ,after returning the bike too jock Kerr the guy went crackers and wiped the floor with him lol(the innocence of youth)

UK Pete:
sounds and looks like the jets are quite finely tuned, but are so susceptible to blocking i wonder how they developed them to get the flow and balance right
pete

Trigger:
 What I am always a little confuse with is that the engine evolved over the years and there is a provision in the moulding of the head head for oil jets to direct oil to number 1&4  but, were never drilled out and used.
The jets that I posted are pigs to get out as they are metal in a alloy head and if they have rusted up, then the only way to get them out is drill them.
Why the hell did they make a jet with a strainer on the back, which is very difficult to remove when the straight though hole that Pete and RGP has is so much easier?

AshimotoK0:
Still confused Graham between the two part numbers circled in red below. What's the difference?

[ Guests cannot view attachments ]

Navigation

[0] Message Index

[#] Next page

[*] Previous page