Valve Clearances for White Cam

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Duccout
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Location: Essex UK

Valve Clearances for White Cam

Postby Duccout » Fri Jul 03, 2020 8:14 pm

Can anyone confirm what the valve clearances should be for a white cam? I have two sources that list it as 2-4 thou, but this seems very small, and in view of the variations in Ducati technical information I'm a little wary.
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Jordan
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Joined: Fri Dec 24, 2010 11:29 am

Re: Valve Clearances for White Cam

Postby Jordan » Sat Jul 04, 2020 3:29 am

2 & 4 thou were the normal clearances for INL & EXH of pushrod Triumph 650s.
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ducwiz
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Re: Valve Clearances for White Cam

Postby ducwiz » Sat Jul 04, 2020 8:14 am

Afaik, the white camshaft was used in the 250SCR n/c and w/c models, and apparently in the 450SCR. The 1964 user manual for the 250SCR and Monza quotes:
Snap 2020-07-04 at 10.08.58.jpg

cheers Hans
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Ventodue
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Re: Valve Clearances for White Cam

Postby Ventodue » Sat Jul 04, 2020 8:19 am

Seems spot on for a wide-case white cam, Colin, i.e. as fitted to 250 SCR & 450 Mark III, SCR according to Jim Pianetta. (Haven't checked for n/c).

Spec in owner's h/book is 0.05 - 0.10mm. And 0.05 = 2 thou, and 0.10 = 4 thou ...
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