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Author Topic: Mechanical advancer unit  (Read 478 times)

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Offline graeme7

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Mechanical advancer unit
« on: August 01, 2011, 11:59:05 AM »
I need one for my cb750 F1.

Does anyone know if all the 750 ones are the same?

What about for 400/500/550/650?

Anyone know for sure, or able to check part numbers?

All i realy need are the weights and springs.

Cant find any for a 750, but found some for a 400. They look the same, but are they?
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Offline mrrch

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Re: Mechanical advancer unit
« Reply #1 on: August 01, 2011, 05:00:16 PM »
Try using spark advancer when searching (got 10 hits from ebay)
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my build

1977 CB750K WITH 1976 CB750F ENGINE

Offline raymond10078

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Re: Mechanical advancer unit
« Reply #2 on: August 01, 2011, 05:18:07 PM »
Based on the part number, yes all advancers for the 750's are the same.

BUT - I clearly remember reading that the various years had different advance curves.  I would expect that the differing curves were achieved by using different springs and/or weights.

Others with more knowledge need to chime in . . . .
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1978 CB750A (upgrading very, very slowly)

Past bikes - Honda: SL350, CX650C, CB900C, CB1000C, CM450A; Kawasaki: several 1972 750 H2's; Suzuki: TC90J.

Bikes I want: CX650ED, a mid-sized japanese V-twin with ABS.
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