Weird vespa part help?

[nivlac]

Hi All

I bought a Vespa that I am rebuilding but the engine and frame are different. None of the parts of the engine make sense and i need to order new parts for the engine. The engine number is VNB2M *016307* the motor comes up as a 125cc when I do a search but is has a 2 port 150cc cylinder on it. Anyways there are two parts i need and brings about great confusion as i dont know what to order:

1. The clutch cog gear rivets have play in them. The rivets and the holes where they go into measure 2.6mm in diameter. The only clutch cog rivets I can find is 2.9mm. I though of just ordering a new clutch but nothing exists for a VNB. the clutches that are available measure 45mm in thickness whereas mine measures 40mm in thickness. I would like to replace the clutch cog gears as well but the back plate (the plate riveted to the gears) is completely flat whereas the other back plates I see have a small step in them.

2. The input gear shaft (Xmas tree) takes needle bearings on the one side. Mine had 22 in and I can only order packs of 21. If I put 21 in then there is a gap a bit bigger than 1 roller. Should this bearing not be a full compliment bearing? the shaft where these rollers run on measures 12.8mm in diameter and the rollers are 2mm in diameter x 11.7mm long.

I have checked sip scooters and scooter west and cant find out more info. 


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i.postimg.cc/0Qsp0hjM/IMG-20220205-071943.jpg

[adrian]

Welcome to the forum 👋, I'm sure someone can answer your questions

[nivlac]

No one?

[adrian]

I have been thinking about this , and I can only find 21 rollers, maybe try ve uk, they are very knowledgeable, best to ring them and have a chat about your requirements. Sorry I can't be of more help 😔

[nivlac]

So for everyones information. Some of the older bikes take 23 rollers instead of 21. I found this on scooterWest website "Some vintage Vespas take 23 of these rollers. You can buy 2 extras of 002457"

[adrian]

Thanks for letting us know. What year is your engine? learning something new about scooters 😃👍

[nivlac]

Its a 1961 150cc. VNB2M