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View Full Version : How to set timeing on lightweight flywheel


WATERWINGS
05-08-2003, 02:17 PM
I just looked quickly at my new lite wheel, and didn't notice any timeing marks, did I not look close enough?
Raceman
05-08-2003, 03:43 PM
Did you look all the way around the top edge of the aluminum? Some of em have a line in em that looks almost like it was whacked with a chisel. The ones that I have that were factory installed on engines all had a mark or 2 and I've got one that was bought as a replacement years ago that was unmarked.
CompKing
05-08-2003, 04:33 PM
Make sure to find true TDC before finding .150(25 deg BTDC)
WATERWINGS
05-09-2003, 09:18 AM
I looked closer, there is some #'s

A5

l 25 (a line, then 25)

l 2 (a line, then 2)


what do they stand for?
WATERWINGS
05-12-2003, 02:14 PM
If there are any doubts, couldn't I just time it with a stock wheel, then put the lite one on?
Jeff_G
05-12-2003, 03:17 PM
Wings those lines /25 and /2 are probably the timing marks for wot and initial pick up. The A5 mark is the part mark and is usually lined up with the key way of the inner hub. ;) See lite weight flywheel thread for all that stuff.

Always confirm the timer pointer and timing locations with a dial indicator in the #1 cyl.

My procedure is the following.
Using the spark plug adaptor put the dial indicator in #1. Rotate clockwise the flywheel until the dial just stops, (TDC). Mark the flywheel with a pencil opposite the timer pointer.

Next turn the flywheel counter clockwise until the pointer stops moving. (TDC) Mark the flywheel. Then divide the 2 marks in half and you have true TDC. Align your timer pointer with this mark.

Next using the dial indicator mark the flywheel at initial pick up and WOT timing. In your case .150 btdc. To double check you can lay a degree wheel on top of the flywheel with tdc lined up and check the degrees.

If on a particular motor you do not know the advance in decimals the degree wheel will do nicely. You can get them through any motorcycle supply for a few $.

Once you have your marks put them on the flywheel with a dab of paint or a small mark with a punch.
WATERWINGS
05-13-2003, 09:06 AM
how about setting it up with a stock heavy flywheel and using those marks, then just switching wheels?
CompKing
05-13-2003, 05:35 PM
Originally posted by WATERWINGS
how about setting it up with a stock heavy flywheel and using those makes, then just switching wheels?

Even if you did that you would still want to follow the steps that Jeff listed.Might as well just do it with the light one on.