who uses this check tool?

Here's a vid (durring a heat wave in Calif) for finding TDC and using a degree wheel. Pay attention on how to use the piston stop tool to avoid damaging a valve.
 
Thomas,
I have the check tool you posted and just followed the instructions and it works. I was fortunate as my mark was dead on but I am sure a degree wheel is a step above but this one tells you a lot and simple to use.
Mike
 
jseng1 said:
Here's a vid (durring a heat wave in Calif) for finding TDC and using a degree wheel. Pay attention on how to use the piston stop tool to avoid damaging a valve.
Click to expand...

Is the key to not hitting the piston the point at which you insert the stop, i.e. when the ex valve starts to close ?
 

Calibration of ignition timing marks (2019)

The refurbishment of my 850 is slowly coming to the end and I just did a check which has been on my list for the past 4 decades. There are several ways to do this butAndover Norton sell a simple disc marked up with TDC and 20 , 30 and 40 degree before TDC. Part no 13.1769. You set the motor...
www.accessnorton.com www.accessnorton.com
 
It's simply a less complicated (but more expensive) way of checking the standard degree scale on the primary cover. I did mine with a timing degree disk (find TDC, set the crank to 28 degrees, remove the disk carefully, refit primary cover and check the result.) I found a difference of around 2 degrees.
 
SteveBorland said:
It's simply a less complicated (but more expensive) way of checking the standard degree scale on the primary cover. I did mine with a timing degree disk (find TDC, set the crank to 28 degrees, remove the disk carefully, refit primary cover and check the result.) I found a difference of around 2 degrees.
Click to expand...
True, but with a piston stop and the tool, no degree wheel is required. A simple mark on the stator at whichever degree you like based on the tool and you have a mark. Then you can check the scale and correct or re-mark it.

For someone rebuilding one engine, it may make no sense, but for me, it has saved a lot of time.
 
This tool confirmed that the primary cover timing plate on my '71 Roadster was off by 4.5 degrees !
 
johnm said:
That is a lot. Hope you checked twice.

Mine was off 2.5 degree which seems to be reported a few times.
Click to expand...
4.5 degrees is a lot. I had checked it previously with degree wheel etc. and got same number. I bought the check tool for confirmation.
 
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