Modern Vespa

The thick washer is a "shoulder washer" PN 70878. It only goes on the clutch side.

Hmmm.
Had one on both sides of the rally…

Where did you find it listed amigo?

Part 39 in the diagram.

TY. I have that diagram but different headset, different pulleys etc.

*scratches head*

if these guys come knocking, you'll know who sent them!

yes... but... can I find it amidst the clamor and clutter within the house of wares?

(probably)

when you find it may depend on the quality of ham that is in question

Must be some ET3 weirdness. Both of my Primavera's both Supers only have the shoulder washer only on clutch side. There's an indent in the casting where it resides.

Measure the inner and outer diameter … I might have an extra.

Thanks all.

I am sorted for now as I robbed both shoulder washers off my Rally 200 Parts bike. Thanks though!

I pulled out the Ricambi books last night and even they do not show the transitional headsets.

It seems the headsets on some large frames and small frames transitioned around 75/76 towards the P style pulleys... but made of metal.
That is what was in the 75/76 Rally and what works with the ET3 headset.

Surly a diagram exists... somewhere?

I wonder if Safis or some of our other smalley experts may have some knowledge about these. Schnakenberg knew what was what with this style headset regarding the pulleys... the washer and spacer stacks though... still a mystery?

Glad I had the spares from the Rally to get it sorted.

On my "poor man's" ET3:
1mm washer outside the headset (shifter tube only), like SoCal mentioned (the diagrams are deceiving).
1mm flat washer, wave washer under both pulleys (same on the Super). No other washers/spacers. Can't imagine your bike being different.
Pin installed and no play, pulleys line up with the ferrule sockets, ride I say!

Btw I "think" the pulley change was for handlebar indicators that were required in some countries in Europe during the 70's. My '80 bike had the same as your Rally/ET3. '74 Super/Rally/etc had the older style.

Thanks Ray.

I installed the washers in the same sequence as they came off the rally with 3mm Shoulder washers on both sides. Without the 3mm washers both tubes on the ET3 headset had substantial lateral movement. March 29th 12:03am...

Ok now I remember your tubes protruding more, earlier in your thread.
Makes sense, but still wild.

Barring me taking a sick day and some delivery miracles I will lose my ham bet... *sighs/ looks sadly at ham vault*

My final full weekend of scooter tinker was interrupted by family time, and that's OK. Yous gotsta put the fam over da ham. (Ifs ya don't... you're doing it wrong.) I did get out to the garage, but it was in fits and spurts and Sunday was mostly circles on the engine.

I had a seal issue that was ...umm... interesting:
I went to put the new fly-side seal in and was using an old seal to press fit it by hand. As I was pressing it home, it got sucked in as if by some whirlpool of destruction well past being flush. (Read: I put too much grease and pushed too hard apparently.) It was wayyyy to far in.

Video of it here: (You're welcome for the ear worm.)



So this begged a question: How in the fuckstockings do I get the bastage out without splitting the cases?!?

I tried to punch a pick through it and never had any luck. I started to see if I could puncture it with an exacto knife and then get the pick through it, but it seemed the razor blade was sure to break before the seal did.
I ended up measuring the depth of the extra seal I had on hand and taping off a small drill bit to match that depth. Then I picked a spot on the seal that wouldn't (hopefully) involve me grabbing the spring with the drill bit. The thought of tiny metal bits fucking up new bearings weighed heavy for sure. Short story long... it worked a treat. The little hole i drilled allowed me to get a pick through and pull the offending seal out. Spring was intact and bearing behind looked happy and unaffected by the shennaigans.

I seated the extra seal on hand, and it is all sorted and good.

Waiting for the pressure test next.
Question for you smallie guys:
Do you pressure test with the intake manifold on or off?

I pressure test with as much assembled as possible in all cases (see what I did there? ). So manifold on.

Glad you got the fly seal sorted!!

The manifold on would also test the manifold gasket, so I do it that way.
I use an old inner tube and make a loop from the intake to the exhaust and pressure and test from the schrader valve stem (minus the valve) using a sphygmomanometer. Like CM said, test it with as much attached as you can, to catch any culprits.

Like this plan! Thx! *Giggles*

Small wood screw, mole grip pliers usually works to remove seals with no space around. 3 screws puncture the seal in a triangle, slowly pull on each one.

Pressure test as assembled as possible… as CM mentioned. That's with intake and exhaust manifold attached (exhaust would have sealant and a gasket, so you end up testing if those leak)

If you're using an old style intake, probably best use a rubber attachment that wraps around the outside instead of pretending to be the carb.

ohhh yeah

problem is I can't get that land of the lost song out of my head now, and I don't think I knew that show or movie at all....

Man, I used to love Land of the Lost. Mostly for the high-quality special effects.

Hahahhaha... Yeah. Sorry/Not Sorry.

"Land of the Lost" ...Think that is probably the theme song of this build. Captures both the missing bits and pieces and my competency in navigating a SF build from scratch. Will keep an eye out for Sleestacks as we button this thing up.

almost here

Possible lyrics to go with the above Steve Miller Band song…

(Verse 1)
I want to rebuild my Vespa,
To cruise through streets anew,
But every time I try to mend,
There's another part askew.

(Chorus)
I want to fix it up so fine,
But it's a constant uphill climb,
Oh, rebuild this Vespa of mine,
So it can soar like an eagle in its prime.

(Verse 2)
I twist and turn the wrench with care,
Yet challenges arise everywhere,
The gaskets rupture, fly-seal sinks in,
Oh, where do I even begin?

(Chorus)
I want to fix it up so fine,
But it's a constant uphill climb,
Oh, rebuild this Vespa of mine,
So it can soar like an eagle in its prime.

(Bridge)
With every setback, I feel the strain,
But the dream of riding keeps me sane,
For when this Vespa's back on track,
I'll soar through streets and never look back.

(Chorus)
I want to fix it up so fine,
But it's a constant uphill climb,
Oh, rebuild this Vespa of mine,
So it can soar like an eagle in its prime.

(Outro)
Someday I'll fly like an eagle,
On my Vespa so fine,
But until then I'll keep rebuilding,
One part at a time.

Lolz.

Just saying….

Ham bet collectors...

Squirrel and Mama Lou are waiting....

The ham-vault is well guarded!


Last night was pressure testing tom foolery.
My PT equip is hot garbage for testing on a small frame. I'll need to reassess. The flange on the exhaust elbow was too much for the inner-tube and poked a whole in it as I attempted to stretch it over. Will need to plug up with a rubber stopper and didn't have anything that fit on hand.

eyes on the ham

T-minus 13hrs…

*ETA*

I forget for 3/28 are we talking 12:01am or EOD 11:59pm? or Astros 1st pitch?

It is a great day. It is opening day! The crack of the bat under a spring sky is the best of days!

It is a sad day. The loss of a ham bet is never easy. See the above for retrieval of your hams.

Onward.

Had to ask the question:

birbs if you hurry you could still win the bolgna bet...

payout

I missed that past pic G-man.
Gold.

OK in today's edition of ET3 headset weirdness:

The M5 x 50mm screw that mounts the speedometer bracket is a good 15mm short.

I thought I had a bunk repop bracket... ya know "Grade A Perfect Repair"... but I even pulled the speedo off my Primavera, and with an OG piaaggio bracket had the same issue. There is no way the M5 50mm screw will work.
*start 60's TV cliffhanger Voice*
Is there another piece to the ET3 speedometer bracket? Is the ET3 headset larger than other smallies? Will just running down a m5 70mm solve the problem?

I hear that commentary in the voice of the guy on the old Batman TV series (the Adam West one)

100% Exactly

I really thought you'd make it in time, but it's always those tricky little details that bite you in the ass when you just wanna do it right.

New deadline perhaps to help keep you on your toes ?

new deadline? all star game