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primary pinion and woodruff key on Ducati single
Posted: Mon Dec 10, 2012 7:45 am
by rospo
Hi. Me again. Is the primary drive helical pinion on my 450 Ducati supposed to have a recessed interior? I can't see the point unless the previous owner was into some weight saving. If that is normal, what size of woodruff key goes into the shaft / pinion? Which work better: tab washers or spring-type washers? Hope someone can help here. Thanks in anticipation. Ross
Re: primary pinion and woodruff key on Ducati single
Posted: Mon Dec 10, 2012 9:32 am
by graeme
Hi, pinion gear is sold as standard. The half moon key is 4mm
Re: primary pinion and woodruff key on Ducati single
Posted: Mon Dec 10, 2012 12:18 pm
by Ventodue
graeme wrote:The half moon key is 4mm
And available from Nigel Lacey - along with the correct tab washer. And a new nut ... and shims, should you need 'em
P.s I think there
may be a shoulder machined on the inside of the pinion -? Tsk! Can't remember now ...
Best ask Nigel!
Re: primary pinion and woodruff key on Ducati single
Posted: Mon Dec 10, 2012 1:12 pm
by Eldert
recessed interior ? do you mean the oil groove thats machined in there .
Eldert
Re: primary pinion and woodruff key on Ducati single
Posted: Mon Dec 10, 2012 7:44 pm
by joe46ho
Hi,
I believe, as Eldert has already mentioned, you must be refering to the oil grove... It IS supposed to be there, and as far as I know is there on all Ducati single primary gears... As for the washers, I use the original tab washers myself, some claim the "spring" or bellville washers are the way to go, to each his own I guess... Here are some pics of a primary gear up close, the factory drawings can be deceiving at times...
Joe
Re: primary pinion and woodruff key on Ducati single
Posted: Tue Dec 11, 2012 6:44 am
by rospo
Mine seems to be bigger than just an oil groove. I know the previous owner did quite a lot of work on the engine. Thanks for your help. I am going to try again with a tab-washer.