I find that if the holes are extremely elongated it is better to file the hole, using a small diameter file, until it is approximately round before drilling. This allows the drill to cut more evenly and therefore produces a better round hole.

John P.

Was there not a recent post that fitting opposing wound springs on the saddle would make an improvement on reducing "wallow".

John P.

This is how I sealed the oil leak from my magneto some years ago, it is still working ok, I am sure that it is one of many methods.
The alignment/clamping tool mentioned in the text is shown in the picture attachment, it has been posted before.

Hope this helps.

John P.

Hi,I will draw a sketch which may explain it in more detail, see tomorrows morning post.

John P.

See pics. of home made oil seal for between the timing chain case and the magneto, the breathers are has original, it has worked well for a number of years. The seal caters for any offset between the hole in the timing chain case and the spindle of the magneto, see alignment marks in the pics.. Hope...

To enable winding the kick start spring I made a tool for this, see pics., you wind the spring it up to its correct tension and then insert the m4 screw, very easy. There is only one penny washer, my sketch is incorrect, the arrow points to the spring retainer and not the penny washer, sorry for tha...

I suppose a way out of our dilemma is to ask John.bebb if he would kindly take back ownership of our bike .

John P.

Hi Johnny, one of the drawbacks that I found when I had a similar problem with jamming was that you cannot see inside the box and observe what is happening between the quadrant and the pinion, plus, I always found it difficult to tension the spring and fit the outer casing all at the same time. To o...

One method of proving mathematically whether the con rod length effects the BTDC angle calculation is to carry out two calculations, keeping all things constant except the con rod length, the con rod length is different in both calcs. If the BTDC angle stays the same in both calcs. then it proves th...

Brillient Simon, you must keep us all updated.

John P.