Transmission Rebuild. Is parallel alignment necessary?

[noreaster]

Hello,

Read and looked at plenty of posts explaining the placement and proper stacking of gears in a smallframe. I plan on shimming for exact tolerance as well.

My questions is. Should all notches (looking parallel with the driveshaft) line up?

Easier said than done perhaps on final mating of the halved cases. But my theory is, if these are in constant mesh with the xmas tree, the final drive gears will not change orientation with oneanother. Would having all notches where the cruciform sits lined up make shifting easier or prone to jumping?

Not a single article I can find makes mention of this, but simply making sure they are stacked in the right orientation. I would think having the openings for the cruciform haphazardly placed would make it more difficult finding a gear quickly.

Thanks for the feedback! If I knew how to post pictures of the project in my kitchen I would. Quattrini M1B, Crimaz clutch system, Egig Mamba, cases vapor honed and decked. Hoping for a nice and tidy reliable scooter.

[Deleted]

What was the question again? Was a long drawn out post.

[tzsteve]

i think you are looking for problems that do not exist

a primmie has one of the simplest and most forgiving engine designs.

just keep the build clean and you will have few problems
do not worry about where all the notches, dogs and teeth are
because once the engine gets going all the bits will move around

[noreaster]

Right on, thanks Steve. Little too good at looking for problems.

[jbcollier]

The "loose" gears on the mainshaft are in constant mesh with the fixed gears on the xmas tree. With the engine running, all the gears are rotating on the mainshaft at different speeds. Lining the gears up doesn't do anything as they will be instantly out of line once the engine is running.

[noreaster]

Yeah, I had to visualize this in my head. The loose gears independently rotate in relation to the xmas tree when not engaged.

My first build of this magnitude and want to get everything as close to right as I can and not split the cases for some time. It's a rotary inducted (pros and cons to this) M1B 60 GTR. Again wish I could figure out how to post pics, quite satisfied with progress thus far and vapor honing does wonders to restore cases without painting.

My other bike is a 69 BMW R50/2, thought this would be a breeze compared. I was wrong!

[tzsteve]

yes photos can be a black art
find someone on another forum to show you how they upload
it took me a while and the guidance of scooterfreak before i got it sorted

i know a lot here use tapatalk on the mobile app

i upload mine to imgur.com and copy the link from there

but you do need to watch someone else first