SOHC.co.uk Forums > CB500/550

Advice appreciated

<< < (9/9)

matthewmosse:
I think I found the choke mechanisn hit the airbox unless 550 rubbers were used. The rest of the stuff aint too bad a fit, dont forget you'd need a choke cable brakett on the bars (bolts on). I think the 550k3 crabs are more prone to issues if stood though so a double edged sword, you get better economy but pay for it if the bike gets stood or cruddy fuel is used. 550 engine and 500 carbs run fine together without rejetting in any case. My next 550 related project once the sidecar is mot'd will be dropping a 650 top end on a 550 motor and adding a su carb in an attempt to get a bit more grunt and better economy.

hairygit:
650 top end on a 550? You will find that it might be slower, the 650 had a slightly longer stroke as well as bigger bores, so you may end up with a lower compression ratio, and the camchain is a duplex on the 650. That said, many years ago a mate bored out his 550 to accept 750 pistons, but had to reduce the height of the crowns by trial and error, although if you measure from the top of the gudgeon pin hole to the crown of the 550 piston, and make the 750 piston the same, it should be okay (We were skint students back then, accurate measuring tools were out of the question :(), but it did go very well! ;D

wizz:
my 550 f2 was running really rich and only doing about 30mpg the cure was a carb rebuild all the jets were knackered, fitted a carb rebuild kit to each carb

Navigation

[0] Message Index

[*] Previous page