Modern Vespa

Assembled the headet and switches into their respective locations and mounted the headset.

Not much in the grand scheme of things, but all I had time for

Got the engine apart today

Polini barrel and piston are toast....

The crank needs a rebuild

I would like to share with the jury evidence of a prolonged oil sucker engine...

There is so much "rubbery" glazing that i am not sure what caused that.

Apart from the earlier tussell with the barrel and piston, it came apart quite easily... I need to source replacement toothed shaft and worm gear, but the rest seems in reasonable condition. At least the casings match and are stamped in single digits

This is a new one to me for holding the idler shaft in.... but I like it!!

Spot tje historic... ah damn it flew across the floor never to be seen again

Look like one of the brake pad cam followers is missing?

That and a circlip where a horse shoe should be

That thing I was telling you about arrived today but not had a chance to open it up yet. Will investigate tomorrow. Might have a spare crank if you need one?

Ill message you around the crank... ill have a look in my spare parts bin and see if I have one

Thankyou!++

Stripped and in the process of cleaning.

Won't be a Vader clean...

But a "professor Johnny go Scoot (TM)" clean

question

The gearbox in this doesn't look right to me... snd iny wuest for authentic. Id like someone here to yay or nay its originality

Primaries are 20/67 and a 35tooth 4th

Every other T5 I have had through my hands had been
Primaries 20/68 and 36 tooth 4th gear.

Which one is correct for a Spanish model T5?

What top end are you going to install?

The gearbox setup seems to have been geared towards slightly lengthening it to match the performance of the polini 152. If you revert to the original gearbox setup, it is guaranteed to be painfully short for a Polini; even an original cylinder would likely gain from the current setup. Something to consider.

No idea with gearbox but I'd ditch that 4th for definite. First on my TX was 58 but no idea if that was standard issue and you only really use it to get rolling so left it alone.

Right now I have a Polini doorstop and aim to pitnone back on at some time - but - will run a standard 125cc top end with a SIP 2.0 I have That's for sure something i intend to do. I even dump it from my 200s

I'm really not liking the SIP2 on my T5. If it doesn't sell it'll get a standard back on or do the 172,JL etc conversion I was planning anyway. Most likely the latter.

Please elaborate why you dont like it?

I.run another t5 with the 172 ane JL right hander.. and love it

It just doesn't seem to have the beef of the standard exhaust, top end is fine but seems lacking elsewhere. This is purely "seat of the pants" feeling. Never been near a dyno in my life.

I've run Sito plus on standard T5 and ot felt a good enough replacement for standard... how do you rate those against the SIP?

You mean Sito+ against SIP2 right?

Not a fan of Sito either as then tend to sound like a dried chickpea rattling around inside your exhaust within a couple of hundred miles but they work okay. I would never, ever fit 1 unless you were completely out of options.









Says he with 2 OE Piaggio sat in garage.

You want an honest answer, fit the proper exhaust.

Looks like i best go try source one somewhere

Make that decision aboit not using a polini barrel superceded.

I just won this on Ebay for less than £20 delivered.

A pair of new rings and a quick hone and it should be good as new.

Well happy!

Do you need a cylinder head to go with that or are you sorted?

I have a standard cylinder head. The one that came on the scooter.

It was running a standard none reprofiled head

Unless you have a profiled one I can persuade you to part with??

Got a couple of standards and a MRP billet for a 172 but that is staying put.

And the cases are now clean.... ready for partial reassembly


Many thanks go to "Professor Johnny Go Scoot" for his superb work here

Well this surprised me....

Out came a metal ethanol resistant clutch side seal..... and really it should have an all rubber one..

Shopping time again

I missed a bit of cleaning... toddles off to do it fast

Looking great!

I hadn't checked out this thread in a month of Sundays.

I'm normally not a fan of the black leg shield trim, but it looks so good with this build. Solid!

Much appreciated!

Professor Johnny go scoot in action with his patented cleaning formula

And this is where we have to leave it for today...

Clean and refurb time for the selector box....

Finally some good fortune, all this needs is a new pivot pin.

Do you have the same picture with the seal installed ?
I'd like to see if it is flush after installation, if possible
Thanks !

Job - jobbed

This is another piece of original equipment as came on the scooter.... vespa stamped inside and nicely refurbished


Where's the Professor... he missed a bit!+

Have you seen the poor machining on this!

I will post that when my ethanol resistant ones land

Great job!

I think it's a smooth call to revert back to, I wanna say stock. You can always tune something else, more available than a genuine T5. LML made T5 lookalike, with a 150 engine.

Wish me luck..... im off to an independent machinist tomorrow to see if he can adapt and lighten me a PX one to make me an electric start flywheel for the thing

They are made from the finest grade of Unobtanium with a periodic table entry of "F-Me" on the price if one can find one.

That's a fair bit of chatter there.

Good luck!

Here a picture with the seal installed- it sits flush to the edge and the bearing rotates freely with no binding against the bearing. Loctite in situ after first removing all contamination of grease etc from the bearing seat with suitable cleaner

Oh seals are BGM branded ethanol resistant