OzVMX Forum

Marque Remarks => KTM => Topic started by: holeshot buddy on September 16, 2013, 08:47:55 pm

Title: 1989 ktm 500 mx timing
Post by: holeshot buddy on September 16, 2013, 08:47:55 pm

anyone know how many mm bftdc on the big beasty ;D

Title: Re: 1989 ktm 500 mx timing
Post by: Lozza on September 16, 2013, 08:59:05 pm

Found lots of confliction info depending on the model of ignition but 1.45-1.55mm BTDC seemed to be common
HTH

Title: Re: 1989 ktm 500 mx timing
Post by: holeshot buddy on September 17, 2013, 08:01:04 pm

ok thats what it is so thats ok have to look elsewhere has no top end from the mid range up
leaned the jetting way down and it improved a lot but still shit back to the drawing board :'(

Title: Re: 1989 ktm 500 mx timing
Post by: jurado on September 19, 2013, 01:24:59 am

Proper 500cc engine timing depends on the ignition system you have:

- Standard MX ignition (Motoplat 9600 176-1): 2.2 mm  BTDC
- SEM K10:  2.2 mm  BTDC
- SEM K11: 1.5 mm  BTDC

Title: Re: 1989 ktm 500 mx timing
Post by: jurado on September 19, 2013, 01:36:04 am

I forgot to mention. When setting the timing BTDC, I would suggest you use one micrometer for proper setting. If you are just a few tenths of millimeters out of the recommended timing, it will make a difference.   

(http://142.0.244.174/ktmtalk/photogallery/galleries/Parts_Mods/611.jpg)

Title: Re: 1989 ktm 500 mx timing
Post by: holeshot buddy on September 19, 2013, 10:00:09 pm

ok its a motoplat and set at 1.5 will redo it to 2.2 and see what happens  ;)