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Lawrie · 06-01-2020, 05:21 AM

Brian, the mechanical advance does,nt start until 400 eng rpm,
All my engines have a tic marked on the pulley and a pointer.
I used to use the timing light and check the timing at 400 rpm, then up to full advance , a pain as I always disconnected the fan belt as it was too dangerous ,
I have the TDC and 4 deg marked on the pulley, I did this when the heads were off .
Tubman,
the device wasn't my idea,I worked at a Yamaha dealer earlier in my life and we used one to set the timing on two stroke dirt bikes.
Lawrie

06-01-2020, 05:21 AM	#7
Lawrie Senior Member Join Date: May 2010 Location: Qld, Australia Posts: 4,221	Re: 33 engine noise Brian, the mechanical advance does,nt start until 400 eng rpm, All my engines have a tic marked on the pulley and a pointer. I used to use the timing light and check the timing at 400 rpm, then up to full advance , a pain as I always disconnected the fan belt as it was too dangerous , I have the TDC and 4 deg marked on the pulley, I did this when the heads were off . Tubman, the device wasn't my idea,I worked at a Yamaha dealer earlier in my life and we used one to set the timing on two stroke dirt bikes. Lawrie