80" timing

[tgarcia]

Does anyone have a 50-53 chief service manual? I need to know how far before tdc to install the distributor. The flywheels I have do not have any marks for reference,I thought I saw 11/16 from the top of the cylinder but that seems like a pile of advanced timing. Was hoping someone could confirm so I could make new marks on my flywheels.

[tfburke3]

You may want to lookat jim mosher's performanceindian web site for a some interesting observations he has made on timing the 80.
Tom

[tgarcia]

Only thing I saw was for 74" engine and scout

[PaulCDF]

Here is a link to this topic from 2007:

Indian 80 Timing - AMCA Forum (antiquemotorcycle.org)

[pisten-bully]

https://www.youtube.com/watch?v=X5-OuwF2yFs&t=761s

Kiwi's video doesn't give a measurement for where to put the timing mark before TDC, but around the 8 minute mark he shows how to time an 80" using flywheel marks already stamped for a 74". Not very precise and not really what you're looking for, but getting closer!

[PaulCDF]

Does anyone have a 50-53 chief service manual?

In the AMCA Library
1953 Indian Eighty Repair and Overhaul Supplement.

SPARK TIMING
"Spark advance 11/16 inch before top center."

[tgarcia]

Thanks guys, Paul I must have overlooked that in the supplement but that's what I thought the spec was. Boy that is a pile of timing,guess I'll have to make my own marks at 22°. Thanks again

[pisten-bully]

1950 timing.jpeg

[tgarcia]

Thanks Harry that's what I was looking for