Motoscrubs.com

hello, well finally got my bike delivered.
started 1st kick! engine sounds a little noisy, want to check the valve adjustments.
I have some books but can't find the specs for the 450 scrambler.
also the valves uses shims on top of valve stems, I live in Kingman AZ so may be
a issue to find some. the bike has 5089 original miles.
thankful any help.

Hi,

Congrats on the new bike. The valve shims are the same as fitted to a modern Ducati that has 8mm valve stems, so we are talking about 620 Multis and Monsters, or 750/900SS, so if you have a Ducati dealership near you then you are OK. As for valve clearances, it depends what cam is fitted; I believe that the Scrambler came with a 'white' cam, which the book lists as 2 thou inlet and 4 thou exhaust, but other cams have larger clearances...... It may be advisable to go with 4 thou and 6 thou to be safe.

Cheers,

Colin

I think you are right to recommend larger than 2 thou for the inlet. When i used to ride a Mach 1 and use its revs the inlet valve clearance would regularly close up as the either the seat got hammered in or valve stretched !!.

wmpowell wrote:<snip> I have some books but can't find the specs for the 450 scrambler.

(In which case I fear you may have the wrong books ... )

0.05 - 0.10mm.

(I've no idea what this talk of 'thous' is. Must be owners of cranky British iron ... )

Sources:
March 1969 Owner's handbook.
January 1970 Owner's handbook
May 1972 Owner's handbook
December 1969 Supplement to Workshop manual
etc etc

I note that the Motociclismo "Guida al restauro ed alla manutenzione della Scrambler" allocates the smaller clearance to the inlet valve and the larger to the exhaust. Which seems reasonable.

thanks for the replies... gonna do oil change, and valve adjustment if needed.
using valvoline vr1 20w50 conventional racing oil seems to be a good choice as I live in
northern Arizona.