Gearbox removal, does the engine have to come out?

[Gearbox]

As in the subject, can the gearbox be removed without the engine? Seen a few posts on the internet, some say yes and others no.
Any advice please, before I start taking mine out. (I have a replacement that I want to fit while I rebuild the existing unit)
Appreciate any advice

[Black Sheep]

No. Engine out for swinging arm machines and especially so for plungers where it is a bit challenging.

[berger]

when i swapped mine for the rrt2 and then swapped it back yo the std the engine stayed in on my swinging arm model

[muskrat]

G'day Gearbox.
For swingarm models the box can be removed without the motor. With plunger models the whole lump has to come out, but in saying that the guts can be removed from the g/b shell with the whole lump in the frame.
Cheers

[Black Sheep]

I stand corrected. On the only occasions I have had the gearbox out, the engine came out as well.

[Ratchet Richard]

Just removed and refitted my A7 gearbox.  It was quire easy once the primary inner cover was removed.  I found taking the top engine gearbox plates off helped a lot.

[Gearbox]

Thank you gentlemen. Will have a go at pulling it out and leaving the engine undisturbed

[muskrat]

G'day Gearbox.
What model do you have?
Would be great if everyone had their models in their profile (next to the flag). With about 1200 members it's a bit hard to remember who has what.
Cheers

[Greybeard]

Would be great if everyone had their models in their profile (next to the flag). With about 1200 members it's a bit hard to remember who has what.

Good idea. Make it so.

[Minto]

Of course, some of you have more than just the one though so still helpful to specify in the post.

[muskrat]

G'day Fellas.
Without going off topic re bikes in your signature (profile).
 https://www.a7a10.net/forum/index.php?topic=419.0
Cheers

[Gearbox]

Working on a Hybrid 1957 Gold Star with 1960 Super Rocket Engine.  Assume that the method of gearbox removal will be the same for a swinging arm A10

[berger]

yes primary side off and plates off the gearbox, one plate can be left loose on the bolts/ studs

[Gearbox]

Thank you again gentlemen. Hope to get it done today (assuming swmbo does not have other ideas)

[Gearbox]

Well, after doing lots of house based jobs, finally got to look at the A10. Removed the primary side and taken all the bits off the gearbox. Hope to get back to it today.
Looking at various bits, I was wondering if the gearing was right. 23 tooth sprocket on the engine, 43 on the clutch, 19 on the gearbox and 42 on the rear wheel. Thought about putting a 24 tooth engine sprocket on.
When on the road, it was reading about 4000 rpm at 55 mph. Seemed low to me. Could be the rev counter is out or the speedo. The gearing is fixed, so as long as it is right, I know where to start.
Engine is to RGS spec, so assume I am best using RGS gearing. Fitting a Daytona spec gearbox if that changes anything