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[Paulk]

I don't want to muddy the water here and as far as timing a Crusader is concerned just before TDC, retarded sounds about right. Doesn't anyone have a fully advanced figure?

But Howzie's calculation got me thinking.

I always thought that terms such as 1/64 (or whatever) before TDC referred to piston travel not crankshaft rotation since 5 degrees (on the crank) near TDC and BDC will move the piston less then when it is halfway along the stroke.

I'm I making sense?

[Paulk]

Hi again,

Just down a search for ignition timing and came up with

http://www.hitchcocksmotorcycles.com/vi ... orumorder=

Just to be clear here I not saying 1/64 doesn't equate to 5 degrees or 3mm at the crank but given that, 2/64 (1/32) would not equal 10 degrees or 6mm or you wasn't saying that in the first place?

[Howzie]

Hi PaulK,

In the Instruction book from Hitchcocks (the pink one)it gives the fully retarded at 1/64" or 5 degrees and fully advanced at 30 dgrees or 7/32".

I set mine at 5 degrees (3mm) and she starts first time and goes straight up to 50mph no problem, I hear what you are saying and you may be right.

By the way this 3mm is the distance on the circumference on the rotor from T.D.C.

Cheers.