Ultima troubles
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Stage III
Joined: Aug 2023
Posts: 3
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From: Rhode Island
Ultima troubles
I have an 81 fxs with an ultima 103 in it im trying to time the cam and i cant get my tdc mark to line up with my pinion mark its 8 teeth off . First time iv been into the ultima motor what am i missing ? Oh ya allready checked the keyway on the pinions fine . Im loosing my mind
Seasoned HDF Member
Joined: Dec 2010
Posts: 7,736
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From: Coromandel Peninsula New Zealand
I have an 81 fxs with an ultima 103 in it im trying to time the cam and i cant get my tdc mark to line up with my pinion mark its 8 teeth off . First time iv been into the ultima motor what am i missing ? Oh ya allready checked the keyway on the pinions fine . Im loosing my mind
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Joined: Nov 2006
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From: la la land jerzey
The cam is not timed to the TDC mark - you use the pinion at 12 o’clock and the one cam mark at 6 o’clock and the other for the breather is around 2 o’clock and the cam gear is around 8 o’clock - put the cover on - set the timing at TDC and turn the trigger till the light goes out - your done
your over thinking it — the ignition is timed at the TDC mark not the cam gears - the cam is on the base circle on one of the TDC up strokes and the other time its at TDC is over lap both valves are open a bit -
your over thinking it — the ignition is timed at the TDC mark not the cam gears - the cam is on the base circle on one of the TDC up strokes and the other time its at TDC is over lap both valves are open a bit -
Seasoned HDF Member
Joined: Nov 2010
Posts: 17,548
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From: Oxford, Nc
That's correct for an electronic ignition. (Advance weights look for the 3 (vertical line ) 0 mark.
(As Twizted said, on the front cylinder compression stroke.)
(As Twizted said, on the front cylinder compression stroke.)
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Stage III
Joined: Aug 2023
Posts: 3
Likes: 1
From: Rhode Island
The cam is not timed to the TDC mark - you use the pinion at 12 oclock and the one cam mark at 6 oclock and the other for the breather is around 2 oclock and the cam gear is around 8 oclock - put the cover on - set the timing at TDC and turn the trigger till the light goes out - your done
your over thinking it the ignition is timed at the TDC mark not the cam gears - the cam is on the base circle on one of the TDC up strokes and the other time its at TDC is over lap both valves are open a bit -
your over thinking it the ignition is timed at the TDC mark not the cam gears - the cam is on the base circle on one of the TDC up strokes and the other time its at TDC is over lap both valves are open a bit -
d rite up and purred like a kitten
Not sure why but i,ll take it as a win..lol thanks for the help everybody
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