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  #1  
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Default 1964 Ironhead Magneto Timing with high compression pistons

Hi there

Looking for some advice on ignition timing.

The bike has been rebored and is now running 10.5:1 pistons or there about.

Timing is set as standard but it is kicking like an angry mule and pre igniting on the manifold side.

Running Harley Mag with Hunt armature and coil - have and advance unit on it which is supposed to retard the ignition a bit.

Anyway need advice as my foot is sore...

Thanks

SF
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retard the timing a bit more
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it's been said for the fixed mag bunch: "time them to start easy, or time them to run well, but you can't have both"...

is this the one?
https://shop.morrismagneto.com/products/mra-r


another option is to hold down the kill button until you are close to the bottom swing of your kick, then let the button go. once you reach the end of the kick stroke where it hard stops, there is a cam that retracts the ratchet gear, and that will prevent you from getting mule kicked too.
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YES - hold the kicker all the way down until the motor stops turning!!! :^)
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Be aware that retarding the spark too much make an engine very hot. Read: damage hot.
Great idle, hole in piston.

Starting /ratchet problems are usually directly related to the ratchet bushing. It will be so worn that the gear starts to tweek to one side and some of the teeth are not getting a good purchase on the clutch basket. This is a wear item, we used to change that bushing every couple of years. The bushing must be machined to proper fit on the ratchet gear. You will not believe how nice they kick with a brand new bushing.

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And a sleeve that doesn't look like an hour glass! :^)
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Quote:
Originally Posted by doodah man View Post
it's been said for the fixed mag bunch: "time them to start easy, or time them to run well, but you can't have both"...

is this the one?
https://shop.morrismagneto.com/products/mra-r


another option is to hold down the kill button until you are close to the bottom swing of your kick, then let the button go. once you reach the end of the kick stroke where it hard stops, there is a cam that retracts the ratchet gear, and that will prevent you from getting mule kicked too.

Hi - yes that's the unit from Hunt..

I'll have a think about the kill switch idea - at the moment the bike only has a kill on the mag.. Sounds a little like Russian Roulette when to take the finger off the trigger..
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You just want some rotating force in the flywheel before you allow the ignition to go hot so that it’s past the point where it can kick back when it does fire. No kill switch on the handle bar? Are they the original bars? Is there an easy way for you to fit up a switch on them?
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Okay - so still not running... had anyone got a good link to, or foolproof method of timing up the magneto on an XLCH?

Thx

Richard
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Ironhead Setting Timing, 1964 & Earlier Mag
http://xlforum.net/forums/showthread.php?t=634523
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