Please Help With Timing

[guitarmoose]

Can annyone give me some pointers on setting timing on a sherpa t? My manual is somewhat cryptic and lacks the small details? And if possible can someone point me in the direction of some pictures of this process?

[bultaco49]

I've not come across any diagrams for Bultaco engine timing but here is my method.

Remove the magneto cover.

Set points to correct clearance (important as changing points setting will alter timing slightly)

Remove the magneto flywheel (using special tool obtainable from Bultacouk/Sammy Miller)

Disconnect black wire from terminal block (under tank). This should be the wire from the points to the coil.

using a multi meter with audible resistance facility (or bulb and battery) connected across exposed points.

Remove spark plug and insert tdc tool (obtainable here http://cgi.ebay.co.uk/TDC-Timing-Tool-Tria...0808141019a5852 ) or google 'tdc motorcycle timing tool'.

Wrap a piece of copper wire (stripped from household mains wire) around body of tdc gauge leaving end of wire near tdc gauge slide. Rock engine until tdc is found. Bend copper wire and point to marked point on mm scale on slide. Turn engine anti clockwise quarter turn then turn clockwise slowley and listen for buzzer on multi meter or light to go off (as points open). Read off how many mm slide has dropped (btdc). This should read 2.8 - 3.0 mm btdc. If not adjust timing by loosening three screws on rim of stator plate and move plate accordingly.

When happy that measurment is correct turn engine over a few times and re check.

More accurate than this method is to use a Bultaco special tool (unobtainable) or Dial Test Indicator instead of tdc gauge..

Replace everything and start bike. At this setting the bike will occasionally kick back on early Sherpa's. If it kicks back badly the timing is too far advanced. Too far retarded and bike will be sluggish.

Most people re-set the timing slightly for preference of power delivery.

Tim