Loncin engine atv

diggerjones

diggerjones

Well-known member
The casting has broke where the starter motor fixes to it. How would i go about getting the fly wheel off and could it be stuck back together.
 

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V8Druid

V8Druid

do it as well as you can,but learn to do it better
The casting has broke where the starter motor fixes to it. How would i go about getting the fly wheel off and could it be stuck back together.
got pix of the rest of the bits Dyl? how does the starter engage with that flywheel? .... the casting might be weldable, but'd have to almost certainly be stripped from the motor and clinically clean to weld it ... assuming you have enough of the detached bits to re-attach
 
V8Druid

V8Druid

do it as well as you can,but learn to do it better
just seen the chain in pic 1 ..... did it snap?
 
diggerjones

diggerjones

Well-known member
just seen the chain in pic 1 ..... did it snap?
No driver abuse. One lad on it, his brother wanted his turn so stood in front of motoring quad and got drove over🤣🤣 this was the result, think it had been bodged before.
I need to know how to get fly wheel off
 
M

Monkeybusiness

Well-known member
Does it not just pull off once you remove the central nut?
 
C

charlie2

Well-known member
Thats why I'm asking. Would it be left hand thread and would a impact gun be the tool
can you see the end of the threads, also it will depend which way the engine turns as to if itd left hand thread i think if engines clockwise it will be anti clock wise so it self tightens but i could be barking up the wrong tree that may only be when its held by taper keyway or splines probably be right hand thread.
 
V8Druid

V8Druid

do it as well as you can,but learn to do it better
No driver abuse. One lad on it, his brother wanted his turn so stood in front of motoring quad and got drove over🤣🤣 this was the result, think it had been bodged before.
I need to know how to get fly wheel off
now I've spotted the chain I am assuming the three SHCS are holding the sprocket on the back of the flywheel .... personally ... I'd slack off the flywheel nut, to the end of the crank's threaded bit, having made a circular/triangular (easier to get behind) plate and replace each of the SHCS with longer bolts through said plate, one at a time to keep the sprocket in place .... nip up all three a little tighter than 'touch down' and give the centre of the plate a decent tap ... shock should release the taper lock....if it doesn't go with a couple, nip up the three bolts a little tighter, being careful not to strip the threads in the sprocket and repeat. Not too big a hammer and the blow needs to be nicely square to the plate face .... be surprised if it doesn't let go fairly easily
 
Gecko

Gecko

Well-known member
The engine is essentially a Honda step-though (Honda cub etc.) - probably more engines of that design than every other motorcycle combined.
A complete engine is worth pricing before you commit yourself too deep.

The flywheel will almost definitely be a key/tapered shaft design where the bolt just stops it coming loose, but takes no real load.

The pull should look like this:
You'll need to check the thread - looks like there are several options from M24 to M33
 
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V8Druid

V8Druid

do it as well as you can,but learn to do it better
The engine is essentially a Honda step-though (Honda cub etc.) - probably more engines of that design than every other motorcycle combined.
A complete engine is worth pricing before you commit yourself too deep.

The flywheel will almost definitely be a key/tapered shaft design where the bolt just stops it coming loose, but takes no real load.

The pull should look like this:
You'll need to check the thread - looks like there are several options from M24 to M33
so the black boss has an internal thread under the nut??? :unsure:
 
Gecko

Gecko

Well-known member
that's a conventionally mounted flywheel though .... Dylans is inverted with the coils carried, presumably in the cover
Oh - yes, you are right. You can see the external thread in the pics, I hadn't picked up on it.

It's "this" type of flywheel

1673532144711.png


and it'll need the "other" puller

1673532350261.png
 
diggerjones

diggerjones

Well-known member
Thanks gents. So the problem will be getting fly wheel off. So I'll have to buy one of these pullers
 
V8Druid

V8Druid

do it as well as you can,but learn to do it better
Not if you use the ugga dugga gun. Pretend it’s a formula 1 wheel change, you’ll be fine!
that is not going to pull it off the tapered key shaft MB .... the nut simply holds it on there .. you then have to pull it to break the tapered seat stiction :rolleyes:
 
M

Monkeybusiness

Well-known member
that is not going to pull it off the tapered key shaft MB .... the nut simply holds it on there .. you then have to pull it to break the tapered seat stiction :rolleyes:
I reckon it’ll defo come apart if you dog it up to FT, it just might not go back together without some glue….
 
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