Guide: Valve Clearances, Shims and Seals. (Pic Heavy)

[Dukedesmo]

Originally Posted by Macflurry

Using MBP retainers instead of standard collets can extend servicing intervals but also require MBP shims to work with them.

MBP retainers are great, I hardly need any adjustments on both my M900 and 916 but you don't need to use the modified shims in 2v engines, only the 4v require them and then only the opener shims.

As far as stopping valves from falling into the cylinder, I find it easier to remove the belts and turn the piston up (gently) to stop it falling.

Good info though.