What tolerance did YOU stay in when adjusting valves? (On a 2V)

[JamesBill]

It seems every source has a different spec and even a different claim to what Ducati techs follow. I am curious what you guys personally followed on the opener/closer on the intake and exhaust.

I checked my loaded unloaded gap and my closer has a .003" gap. Even if I ordered the correct shim and it was perfectly machined to the right size, new half rings might put me to bind the closer to I think I am just gonna leave it.

[brad black]

don't replace the collets.  0 on the closers without drag, 0.10mm on the openers.

[seevtsaab]

+1 what Brad said (.004" on opener). If your collets aren't busted leave em, the longer they stay the easier it is to tell which side is 'up'.
It also occurs to me, the longer they wear, the slower they wear, but I might be making that up.

Make sure to get a good reference feeling the cam pulley spin with no load, I imagined some drag I think and sanded in about .001" clearance on a closer.
Also - if you use the shim measuring tool to help hold the shim while sanding - be make the beast with two backs sure you are sanding the shim not the tool.
Please don't ask me how I know this ....

Have fun with it, it's a tedious and fiddly job but my little 620 runs as good as ever at 53K miles.

[Riverdrive]

O

[He Man]

If you have the $$ go with MBP Collets or similar.

Easy to tell which way they go. Easy to install, and extends adjustments by a long shot.

[thorn14]

+1 on the MBP collets. Haven't moved in 12k miles.

[JamesBill]

+1 what Brad said (.004" on opener). If your collets aren't busted leave em, the longer they stay the easier it is to tell which side is 'up'.
It also occurs to me, the longer they wear, the slower they wear, but I might be making that up.

Make sure to get a good reference feeling the cam pulley spin with no load, I imagined some drag I think and sanded in about .001" clearance on a closer.
Also - if you use the shim measuring tool to help hold the shim while sanding - be make the beast with two backs sure you are sanding the shim not the tool.
Please don't ask me how I know this ....

Have fun with it, it's a tedious and fiddly job but my little 620 runs as good as ever at 53K miles.

You sand your closer shims if they are tight or binding?

So you suggest before I change the closer valve to get a reference feeling of spinning the cam THEN change to the new shim and check for binding?

Thanks!