rotoryvalve timing mark gti 720 help

[spunkyone]

i need some pics of timing marks or tell me wereto find info please HELP:cheers:

 

[seadoosnipe]

Degree wheel.....

The only way to find out where your rotary valve is suppose to be on your shaft, you'll need a degree wheel. You can use an old protractor from school if you can align it and hold it steady while marking.

You'll need to bring the mag piston to TDC......Then, you take a degree wheel and lay it across the center of the shaft with the alignment mark of 360* set at the bottom edge of the inlet port to the mag cylinder. Then, look around the degree wheel for 147*. At that degree, make a small mark on the edge of the casing.

Then, move the degree wheel to align the 360* mark to the upper edge of the inlet port of the mag cylinder. Now, look for the degree of 65. Make a mark on the edge of the casing there.

Now, with those two marks made, without turning the shaft, place your 159* rotary valve plate on the shaft, where the cut-out edges of your wheel, align with those two marks you made. Your engine is now in time with the opening and closing at and before top dead center.

Your ready to put your rotary cover on..............