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General => Douglas Motorcycles - General Discussion => Topic started by: tck on 29 May 2021 at 15:19

Title: Timing a MK
Post by: tck on 29 May 2021 at 15:19
Well I have just done this Job but what a faff it is with the engine in place I shall know next time
I had to take the timing cover off and place a timing disc on the front engine nut (magnet) and then turn via back wheel unable to see disc as I use the equal stop method i was back and forward like a fiddlers elbow just in time I remembered to pull the mag lever wire as its tight wire advance. For once in my life I considered using the  measuring the piston height in the barrel method :-0
Title: Re: Timing a MK
Post by: yosemite on 29 May 2021 at 20:39
I use a socket angle gauge, modified to take a larger angle disc and pointer makes life so much easier, also have a socket with a screw through the side to lock it onto the crankshaft nut as it used to rock due to the tab washer. Unless I do what I did last time and rotate the engine the wrong way
 When i get round to it I intend to modify it by making a disc specifically for the Douglases with correct engine rotation
Title: Re: Timing a MK
Post by: tck on 30 May 2021 at 07:40
I like the idea of the socket with a grub screw to hold it steady I have recently discovered an electronic angle gauge for around 12 it has a magnetic base so I just need to modify a socket with a grub screw and a platform for the gauge (its about 2" square) then i can turn and read at the same time though the proximity of the mudguard is an additional difficulty
Title: Re: Timing a MK
Post by: Red on 30 May 2021 at 09:40
I am just too lazy. I carefully find TDC by measuring down through the plug hole using a DTi and then rotate the engine until the piston is 7mm BTDC. If anything I err on a slightly over advanced initial setting and once out on road test I can adjust the advance and retard lever until I get the optium setting. I then put a paint blob on the lever so I know for future reference.