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In an attempt to find my original Italian (raised Innocenti logo, if memory serves correctly) alloy drive-side retaining plate, which was being discussed elsewhere, I had a look through the internals that I'd taken out of a GP200 motor, many moons ago. Whilst I could not find the drive-side plate, I did note something that had caught my eye when I stripped the motor originally.

If you've followed the link (seems to work) then you'll see that the rear of the Innocenti 47 tooth rear sprocket has been engraved with part number, date, signature and 'taglio-D', with Google Translate suggesting that taglio translates to 'cut'.

This is the only time that I can remember finding such markings, however, I seem to recall stories of similar being recounted by others (?). Perhaps this is something that others have found? The info is intriguing and I wonder if this relates to development of parts, the end of a production batch, an employee's last day or simply a slow Friday afternoon? Either way, I liked it and thought I'd share it with you.

Adam

Hi Adam.

That's a nice piece of history to own. I wouldn't exactly frame it & put it on the wall, but I'd hang on to that, if I were you, just because it's a 'tactile' piece...

Nice photo's of a tidy crank as well!

Thanks for sharing.

That's fantastic! I'd frame it!

Warkton Tornado No.1 wrote:Hi Adam.

That's a nice piece of history to own. I wouldn't exactly frame it & put it on the wall, but I'd hang on to that, if I were you, just because it's a 'tactile' piece...

Nice photo's of a tidy crank as well!

Thanks for sharing.

Yep, I've got Sean Brady to thank for chamfering / flowing the crank webs for my crankcase induction motor (Ron Moss crankcase version of the TT3).


Bilko - Yep, I'll hang on to it. It seems like that should be the one that I use in the motor of my GP200E when I finally get around to restoring it. It can be my favourite rear sprocket... in my favourite scoot

Are you rebuilding the engine to factory spec?

Flippin eck. Didn't read your post properly.

Like this one?

Post by rossclark » Sun Jan 29, 2017 6:53 pm

Like this one?

A perfectly good drive side oil seal plate.

Putting my neck on the line (again...) I’d say that the alloy ones are more than adequate for the majority of engine builds.

They have a bad reputation, but my opinion is that has come about by a combination of other factors.

Although I use hexagon socket countersink screws myself, they so easily allow over-tightening. In addition, any aftermarket ‘Hallite’ gaskets may be too thick or less compressible than OEM, which also encourages the distortion of the alloy.

[quote="rossclark"]Like this one?

Yes, exactly like that one! It amazes me what my mind retains (the detail of raised logo), whilst I can't even remember what I ate for lunch today (assuming I ate)!

The comment, which I think may have been on FB, was that SIL were the first to experiment with alloy drive side plates, which I knew to be a mistake. My example of this type of plate is in one of my motors and I wasn't about to start stripping them down to take a photo... so thanks

Adam