Ignition timing problem

jojo09 · Nov 28, 2023

Charper90 said:
Hey Taffy when installing the cam and cam chain with the bike at TDC how do you know which way the cam lobes are positioned. I am rebuilding a 98 400fe and there's little info I can find on timing this thing perfectly. I can stick a screw driver in spark plug hole and find TDC but I'm confused on what position the cam and cam lobes should be. Maybe if you have a picture or something showing me the lobe position when putting the cam chain on or if there are marks I am missing. Thank you sir. My phone number is 813-363-8378. I know it's a lot to ask you for your help with my phone number but I'm desperate lol. Everything else has gone perfectly except for where I'm at now with the timing. Thanks man Charlie

With the engine in TDC (compression stroke) the cam lobes have to be facing down like an upside down V.
When in exhaust stroke they point upwards- (normal V).

Taffy · Nov 29, 2023

you should have a very, very small triangle indented into the outside of your flywheel. it is only some 1/8" or 3mm tall. and it has to line up with a mark or dot (can't recall) on the crankcases at about 10.30. Perhaps someone has a photo?

The drawing attached is of WHEN you have the flywheel and therefore the piston in the right position.

Zaga did do a great description somewhere? look up Wiki and then 'the doc' and then go to electrical area.

Taffy

Ignition timing problem

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