Theyre a good thing!

Quote from: memper on April 16, 2013, 09:13:02 PM
I will try to sort out the valves Thursday but I might be distracted by

Cool! Want....

i slide the opening rocker out of the way and push the valve tip down with my thumb.  if it moves, there's clearance.  how much is generally much less than you'd expect.  0.10mm feels like an heap.  if you turn the cam around and it drags then a closer is too tight.  if you put the cam where it's tight and push down on the valve tips one should move down, so you'll know which one is tight.

Thanks. I will try that. Frankly, I never liked the screwdriver method.
I will re measure all my gaps and see if I can just do a little sanding on the tight closer.


I will swap around my openers. Is .006 too large an opening for an exhaust opener?

Quote from: memper on April 17, 2013, 07:01:51 AM
Thanks. I will try that. Frankly, I never liked the screwdriver method.
I will re measure all my gaps and see if I can just do a little sanding on the tight closer.


I will swap around my openers. Is .006 too large an opening for an exhaust opener?

.005 is better.

Quote from: ducpainter on April 17, 2013, 07:32:53 AM
.005 is better.

Spec is 0.004" to 0.010".  It is optimal to run a tighter opening clearance, but honestly...  Anything within OE specs is sufficient.

You're building a new bike (almost that is).  I wouldn't bother concerning yourself w/0.001" worth of opener clearance when you have so much else to do... 

BUT, that's just me and this is just my $0.02.

Quote from: Duck-Stew on April 17, 2013, 04:23:45 PM
Spec is 0.004" to 0.010".  It is optimal to run a tighter opening clearance, but honestly...  Anything within OE specs is sufficient.

You're building a new bike (almost that is).  I wouldn't bother concerning yourself w/0.001" worth of opener clearance when you have so much else to do... 

BUT, that's just me and this is just my $0.02.

Hey Stu whats you take on this for 750 heads?

http://ducatitech.com/2v/maint/rebuild/headwork.html

Quote from: Duck-Stew on April 17, 2013, 04:23:45 PM
Spec is 0.004" to 0.010".  It is optimal to run a tighter opening clearance, but honestly...  Anything within OE specs is sufficient.

You're building a new bike (almost that is).  I wouldn't bother concerning yourself w/0.001" worth of opener clearance when you have so much else to do... 

BUT, that's just me and this is just my $0.02.

Is that .010 number the 'new relaxed' spec?

I don't disagree about it maybe not being worth chasing that valve that's only .001 from optimal.

Quote from: Mendo Dave on April 17, 2013, 04:35:26 PM
Hey Stu whats you take on this for 750 heads?

http://ducatitech.com/2v/maint/rebuild/headwork.html

Don't bother.  If you're after some hotter small-Duc heads, I'd buy some 695 heads.  Direct bolt on, bigger valves, better chambers, better ports and stronger cams.  Can usually be had for cheap-ish...

Quote from: ducpainter on April 17, 2013, 04:48:12 PM
Is that .010 number the 'new relaxed' spec?

I don't disagree about it maybe not being worth chasing that valve that's only .001 from optimal.

As far as I've known, it's always been 0.004" to 0.010" spec.

Quote from: Duck-Stew on April 17, 2013, 05:51:03 PM
Don't bother.  If you're after some hotter small-Duc heads, I'd buy some 695 heads.  Direct bolt on, bigger valves, better chambers, better ports and stronger cams.  Can usually be had for cheap-ish...

As far as I've known, it's always been 0.004" to 0.010" spec.

Thats just the sort of answer I was hoping you had. 

Quote from: ducpainter on April 17, 2013, 04:48:12 PM
Is that .010 number the 'new relaxed' spec?

I don't disagree about it maybe not being worth chasing that valve that's only .001 from optimal.

Thanks fellas. I talked to Mike about the loose closer and seeing that I never ran the bike after the install of the shims he's willing to send me a better fitting closer in exchange for that one really loose one (which may not actually be too loose after discovering that I press too hard). But I figure while he's sending me the closer (if I really do need it) that I will just buy the one opener that I sanded too much. I like knowing I set something to what I want rather than sufficing for a mistake that is "good enough".

On another note I casually tried to put the FCR in earlier. I have a removed airbox situation. Seems I gotta cut away a bit more of the remaining bits of air box "buttresses" for the carbs to fit...I hope I dont need to cut the front wall off the battery box because I like the stock coil location. And that would pretty much render the stock battery box useless. Certainly not ready ($$) for the LifePo in the custom tail unit step yet

there's some airbox mods pictures on my blog.

Quote from: brad black on April 18, 2013, 07:57:07 AM
there's some airbox mods pictures on my blog.

What part of your blog?

FCR and (temporary) straight pipe vid!
Ducati M750 project

Whats that rod sticking out the side airscrew adjustment?

Oh and if your running velocity stacks are you just using a small filter on the crank case breather?

Im glad your sharing all this because I have to do most of the same stuff on my 750 later this summer.