4 degree offset key and timing marks.

stewbrash · 05-27-2021, 05:32 PM

I acquired the 4 degree offset key and will eventually install when I get a stator gasket...but the big question (Dan?) is...do you need to make a new mark to the right for TDC for when you adjust your valves? I looked for the size of the flywheel and the only info was that a Zongshen 229cc diameter is 110MM. that would make the circumference 346MM. Divide by 360 and you get 1.040MM per degree. So, should the timing mark for true TDC be roughly 4mm to the right of the mark after installing the key?

05-27-2021, 05:32 PM	#1
stewbrash Join Date: Oct 2016 Posts: 405	4 degree offset key and timing marks. I acquired the 4 degree offset key and will eventually install when I get a stator gasket...but the big question (Dan?) is...do you need to make a new mark to the right for TDC for when you adjust your valves? I looked for the size of the flywheel and the only info was that a Zongshen 229cc diameter is 110MM. that would make the circumference 346MM. Divide by 360 and you get 1.040MM per degree. So, should the timing mark for true TDC be roughly 4mm to the right of the mark after installing the key?
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