Topic: CB750 ignition switch

[Sgt.Pinback]

Hi,

have three different ignition switches, all with roung plug.

I assume the one on the left (with "OFF" upside down) is (late) KO. Can you identify?

[Johnie]

A true KO switch will be recessed at the key. Those appear to be for the K1.

[Sgt.Pinback]

Not all KO had the recessed ignition switch.

The three in my photos are different to each other:

left has "OFF" upside down
middle has "OFF" upright down, shorter thread and a different ring
right has "Ignition" instead of key number (= after market?)

Can you please check on your K1 and on your K3?
or anybody else with K1 -K6.

[Don R]

 I always believed the one on the right to be aftermarket, I'm curious to see if that's true also. The locating washer with the tabs is a rare bird too.  my K4 might be original, i'll check it later this morning.

[CycleRanger]

Imho, the one on the left is original. The other two are repops.

[Johnie]

If you got a KO without the recessed then it's a real late KO built after they ran out of the recessed and started to put the K1 switch on. I will check mine for you and get back to you.

[Sgt.Pinback]

Imho, the one on the left is original. The other two are repops.

Maybe, but
IMHO the one in the middle is an original as well, at least has a genuine HONDA key and key number.

[CycleRanger]

Imho, the one on the left is original. The other two are repops.

Maybe, but
IMHO the one in the middle is an original as well, at least has a genuine HONDA key and key number.

It may be a genuine Honda part but it's not K0-K1 era.

It's the apparent NXXXX (if I'm reading it correctly) code that makes me think it's at the very least a later '70's replacement.

[754]

 I agree the right is likely aftermarket. The middle switch could be K2, they should all be round plug...

[goldarrow]

I think left is original from 70's, middle is Honda repro, right is aftermarket

[Sgt.Pinback]

Middle is number N2738.

The one in the middle looks like this one:

http://www.ebay.de/itm/Honda-CB-750-Four-K0-K1-K2-Zundschloss-Original-35100-303-007-/322030553016?hash=item4afa8447b8:g:yXEAAOSwLVZV6C9k

I trust M. Döring (sandguss) that its a genuine HONDA switch 35100-303-007

But actually cant find 35100-303-007 in my parts book.....
Here K1, K2 should be 35100-313-003

Being more and more confused

[CycleRanger]

That PN is obsolete and likely a combo code to consolidate part numbers.
In the late '70's and onward Honda would create codes for older parts that were essentially identical.
That switch could be used in a several different bikes, not just 750's.

For example PN 35010-303-003 was superseded by 35010-315-017 which is the current PN for a couple of dozen bikes prior to '71.

That -007 PN may have been the European number, same number later rev.

[ekpent]

  Lots of Honda's used that early round plug. Here is a list a guy compiled for his E-bay auction. Some of the 450 switches were even recessed and guys try to sell them as original sandcast to unsuspecting folks.  http://www.ebay.com/itm/Honda-NOS-CB750-750-Key-Ignition-Switch-175-125-350-450-35010-315-017-/221276238289?hash=item33851771d1:m:mu2JcofwJe3JgvI198rVvZQ&vxp=mtr

[Sgt.Pinback]

Thanks.

 So this one looks as mine on the right.

So all of my switches seem to be genuine switches but I still do not know which one came with which 750.

I assume: (late ) K0 - K1- K2 from left to right