Undercut or worn gears?

[Speedie]

Hello all!
Not sure about these gears from my Z1000. Would we say these
Dogs are the undercut type? I noticed that brand new ones have a
straight side where they mesh with each other, and so I am not sure if I have standard gears with excessively worn dogs or undercut gears that may be normal or also worn?
Many thanks for your thoughts.
Paul

[z1bman]

They are indeed undercut gears

[Speedie]

They are indeed undercut gears

Thanks for the reply.
Can I assume these gears look in good condition then, and that a standard bike didn't come with undercut gears and therefore someone has been in and upgraded the gearbox?

Thanks
Paul

[zed1015]

Yes! Those are non stock undercut/backcut dogs and look to be in very good condition.
The angle looks a bit aggressive though, usual cut is around 3 degrees.
FYI. The only big Z aircooled four with a factory undercut was the 1100A unitrack.

[Speedie]

Yes! Those are non stock undercut/backcut dogs and look to be in very good condition.
The angle looks a bit aggressive though, usual cut is around 3 degrees.
FYI. The only big Z aircooled four with a factory undercut was the 1100A unitrack.

Thanks Rob, that's why I wondered if they were worn as the angle
looked too steep against the photos I saw on the PMC site that show undercut gears.
Do you think there could be any issues?
Did the untrack have the same gear ratios as the Z1000? Hope I've
got the correct gears even though they're the undercut ones.

Paul

Thanks

[zed1015]

All that a steep angle may do is make shifting a little harder as the gear dogs will be more deeply engaged.
The unitrack has an entirely different gearbox, tooth form, ratios and larger output shaft which needs major modification to fit the early cases.

[Speedie]

All that a steep angle may do is make shifting a little harder as the gear dogs will be more deeply engaged.
The unitrack has an entirely different gearbox, tooth form, ratios and larger output shaft which needs major modification to fit the early cases.

Thanks for that, very much appreciated! Do you think they are slightly worn or cut like that? Odd that my project
which was a bit rough in places to start with now throws up a upgraded box

[zed1015]

They are cut like that and show little if any wear.
Any wear will usually start to show up as rounding of the peaks and yours look crisp and sharp.

[Speedie]

They are cut like that and show little if any wear.
Any wear will usually start to show up as rounding of the peaks and yours look crisp and sharp.

Invaluable advice! Thank you.