Timing Drift

[Pravin]

Hello Experts !!

I have converted my RD350 to points ignition and am happy I did .... I enjoy the character the bike has now with points : )

One issue as I think all have is setting up the timing ..

My issue is every time is set timing to 2~2.1 mm BTDC  after say 20 ~30 km only the timing drifts back to 1.7mm BTDC. Points are NEW and Cam is in excellent condition, all the screws are hand tight at wrist torque..

Now is this normal ? has anybody actually checked the timing after 20 km ? just for the sake of it ? am curious to understand the reason for  this timing getting retard so quickly. Though she still gives a back kick as you Switch ON power to the coils ..and starts n rides okay  but its kind of annoying to have the timing at 1.7mm BTDC


Regards,
Pravin Dalvi

[Striker1423]

are you positive you set the timing at the center of the highest point on the cam? and double-checked the points gap?

[m in sc]

^ this. and use a timing light.

the heel pads might be settling in, as they wear the timing will be more retarded.. mine stay consistent on the few bikes i do have have with points, but always check them after 50 miles or so after new to make sure they settled in ok. Usually they are fine, but new ones , brand new ones, might need a tweak once or 2x early on.   

[Pravin]

are you positive you set the timing at the center of the highest point on the cam? and double-checked the points gap?

The points open at the beginning of the highest spot hump  and thats where i have set my timing..

[m in sc]

gap needs to be set at max height, not the beginning of the cam lobe. you do this visually, its easy if you look closely.

[Pravin]

Yes gap is set to .38mm at the highest point ..

Timing is set when the point opens ...set to 2.1mm btdc