Another eng swap thread:(Edit: no longer considering EFI, upgrading 750 engine

[LowercaseJake]

I can push the large starter gear inwards towards the engine and the gears now mesh, but it doesn't seem like there should be any play between the large gear and the FW. The flange and caged bearing are installed exactly as the instructions state.

Here's the view of the FW.

https://photos.app.goo.gl/tvnub32yXy8zKG8Z2

[ducpainter]

Have you tried installing the nut to see if all the play goes away?

[LowercaseJake]

Have you tried installing the nut to see if all the play goes away?

No.... To me that seems too much like "forcing the issue" and bad things happen when I do that. It seems to me the flanged spacer is too tall, it should be flush with the inside lip of the large gear. Tightening the nuts won't change that. But if you look at my last pic of the spacer, caged bearing and thin washer installed and this looks right to you well sure I'll tighten the nut down (not the full torque) to see if it removes the play.

[LowercaseJake]

DP you just nailed it. I put a little torque on the nut, play is gone, FW installed. Now to remove the original nut and install the dual lock nuts.

I was being to careful, which is the opposite of how I normally operate. Now just gotta install this bracket and hope I get the alignment correct and the air gap correct.

THANK YOU

[LowercaseJake]

Well that's lame. Lock nuts are much bigger than the OG nuts and I don't have a socket that big

[ducpainter]

I know the OEM nut has a bad rep, but I've never seen one that was properly torqued, and installed with red loctite, come loose.

[greenmonster]

+1.
ALWAYS clean threads thoroughly, red Loctite and correct torque.

[Duck-Stew]

Be sure to align your flywheel to the outer notch on the crankshaft.

As far as the lock-nuts go, here's my $.02:  If you already have them, might as well use them.  If not, clean threads, plenty of red loc-tite and set the torque to the factory value.

[LowercaseJake]

Those jamb nuts took a 36mm socket!! Who the F has that laying around?? Luckily I have this absurd 3/4 "jumbo" set from Harbor Freight, I did the penny trick and used a 2 foot breaker bar plus lots of loctite.... I'd say I'm good... I hope.

[ducpainter]

Buy a torque wrench.

[LowercaseJake]

Buy a torque wrench.

I have 2...both very good quality, one is a micrometer style for torquing reeeeally small bolts. In this case however I didn't have a 36mm 1/2 deep socket. And I'm not buying a 3/4" torque wrench.

I don't see them going anywhere given the force with which I applied them using a 2' breaker bar, also knowing what I know about how jam nuts work (they'll remove a cylinder head stud before they come loose) but yeah I'm shopping for a 36mm 1/2 drive deep socket right now. I don't disagree with you, DP and you're the one who got me through this.

So while I have a captive audience... Any recommendations on setting the bracket position and air gap? Liam from Fast Bike Gear recommends setting them as close as possible, basically with just enough clearance for the lump. But I don't see any obvious markings for the bracket, and there's a ton of room for advancing or retarding the ignition rotating that bracket. Since my sharpie marks washed off I set it in the middle, slightly biased to the left as that's how I remembered it being. My Haynes manual arrives tomorrow.

Oh and those lock nuts... Honestly I'm more worried about getting them off than anything else. They're so thin that getting a socket head on just the first one *and* applying enough torque to get it off won't be fun.

[ducpainter]

They make 3/4 to 1/2 adapters...problem solved...or...

use the factory nut and eliminate the rest of the hassle.

Like Gert said...clean the threads well, use red loctite, a torque wrench, and be happy.

[Howie]

https://www.craftsman.com/products/craftsman-1-2-to-3-4-in-socket-adapter

[greenmonster]

You`ve just had a seized engine.
So why not do it as thorough as possible?

You-do-not-want-a-loose-flywheel. Could mean ruined splines/keyway etc.

Get the socket & adaptor and follow the Haynes.

[Duck-Stew]

36mm deep well 1/2” sockets are used to torque front wheel drive car axle shaft nuts.  Call your local auto parts store.  I paid about $12 for mine.

Air gap?  There is a spec for that.  Do not run it as close as possible!  Things grow when they heat up.  0.020” comes to mind but I haven't set ignition pickups in ten years.