Join Date: Apr 2013
Location: Brittany north-western France
As I posted - the balance shafts are not chain driven, they are driven at 2 x crankshaft speed by a gear on the crankshaft, it's not chain tension, it's gear mesh.
They are inside the crankcase on the left-hand side of the motor, so the adjusters are also on the LHS.
Edit - I just looked at a better, clearer parts diagram, the front shaft adjuster is on the left and the the rear adjuster is on the right - apologies, I don't like dishing out wrong info!
From the Haynes manual, the adjustment is as follows:-
Static adjustment with cold motor.
Slacken the adjuster pinch bolt. Turn the adjuster shaft slightly clockwise using a flat bladed screwdriver until a torque of 0.4 Nm is reached (meaning resistance is reached because the gears are now meshed tight together) then turn the shaft one graduation anticlockwise marked on the holder when adjusting the front balancer shaft and two graduations when doing the rear.
Then carry out the dynamic adjustment.
Must be carried out with the motor hot.
Let the motor idle.
Slacken each balancer pinch bolt in turn and turn the shaft slightly one way and the other to find the point where the gears run at their quietest, too tight and they will whine, too loose and they will clatter.
(Resist the temptation to have them meshed too tight to get rid of any slight gear clatter - my remark).
Tighten the pinch bolt after each adjustment.
Rev the motor to check noise above idle.
Last edited by barnstormer; 09-17-2018 at 03:12 PM.