SOHC.co.uk Forums > CB350/400

CB400F Carb overhaul

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K2-K6:
Just to add a bit about making your own; the feeler guages may offer you quite a resistance to shape them well/drill holes as the material spec calls for a fairly hard spring steel if they are of decent quality.

A more useful scource could be a discarded stainless kitchen sink to give you that thickness of material.

If you were to drill two holes the correct distance apart in the steel, then sandwich in between two pieces of plywood clamped with bolts and nuts through the holes, then it would allow you to shape them by hand without bending them. Also you can make more than one at a time in the same clamp to halve your work.

Lobo:
Thanks K2-K6,

Already gone down the clamping route; using aluminium sheet & abbuting peripheral rivets to hold the 'feelers' rock steady within. (the back of the pop-rivets then sit into corresponding holes of a large wooden block to resist twisting in the drill press)

The feelers I've used are .35mm & .40mm, ie two of each sandwiched, to give 4 pieces.

After I get (the bloody difficult holes drilled) I will rivet through those (now including large washers to give external radius) and keeping the sandwich in tact then grind the shape.

Well, that's the theory...

.....and in the meantime will keep an eye on ebay etc - thanks to Steve400//4

Cheers!

Lobo:
Any Tec guru out there care to explain wht the 400F carbs so 'complicated' versus the older CB750's? Specifically the lifter mechanism, which on the 400 appears overly complicated with sliders, springs, elbow sockets, fancy dust seals...versus a good old up/down external vertical lifter?

Ta.

Bitsa (Ralph Wright - RIP):
lobo,

Dead right  complicated and fiddly all those years ago I hated them.Luckily the only 400/4 I restored the carbs apart from usual cream krackered o rings and cleaning I did not need to take them to bits.No help to you but I would take lots of pics when you attempt to do them.
Cheers
Bitsa

Lynx:
It does say 350, 400, 500 ,550 in the title.
I tried doing a bit of research on it but all I found was Honda part Nos. for the assemblies including this part is 16029-323-004 and 16030-323-004 fits CB400 and CB550.

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