Fooked Rimini 5 speed.

[dave wheeler]

the process of putting the gearbox is not technically difficult, but it is extremely labourious, had the endplate on and off over 2 dozen times to check the shimming but the result is outstanding, especially when you go back to riding a 4 speed. my otherwise standard TV175 performed brilliantly on a tour of the alps, and it states quite clearly that anything more than low 20`s bhp is too much, is it any wonder things are looking grim, would love to know what the ratio of failures to happy customers is?

[ducksta]

probably too many for the price

[sydduckett]

I have one on an RB and my riding style and gear changes can be best described as agricultural. The 5 speed has really made a difference to the scooter, it's quicker through the gears, in the power all the time, has a better top end and has reduced fuel costs. It's never broken and like the prev post the gear doesn't quite line up.

It's without doubt the best after market part I have brought even at £800.

As an aside you can drill large holes in the end plate so you can see exactly how the gears are seated without the need to stick a phone down the side......

[wrecklessrobbie]

I know not a lot about lambretta so am prepared to be laughed at and shot down with my next question.
Why are you trying to fit five gears into a space made for four gears?
( I know the extra gear will be for cruising and give a getter spread of power).
I have seen engine case packers from MB to be used with a 6 plate clutch.
If the crankcase side can be packed out 10 mm can the endplate that holds the gears not be packed out by 10 mm. Then a longer set of gears could be produced that are thicker and line up better.
Just as thought.

Robbie

[wack 63]

Along with a longer layshaft and a front sprocket carrier.Interestingly Vega's have a stepped endplate to fit 4 gears compared to a Lui 50's flat endplate with 3 speed.

[rosscla]

You'd probably run into problems with the length of the layshaft, needing a custom one and the 'throw' on the wishbone of the gear changer. Then there's the alignment of the sprockets to consider too...

Too much

[Muppet]

can it be done without other changes cus selector dont got 10mm extra travel the gear pivot wishbone on top of engine and tie rod wont allow it,

muppet

[wrecklessrobbie]

Ok
Yes probably too much work.
My thought was if they are making a new gearbox why not make a new lay shaft as well.
And slightly longer front sprocket.
But i suppose its going to be too expensive.

Good job im not a scooter engineer.

I suppose its just a question of fit the gearbox, shim it, check it and hopefully it will be fine.

Robbie

[ArmandTanzarian]

It's the seemingly random nature of the failures that are a worry. A lot seem to be at low speed on moderately powered scoots. On the other hand, a mate has one fitted to a tuned RB that he thrashes the life out of at every opportunity and that seems fine.

[Adyonekenobi]

I have to agree with Bristolmods thinking.

My TS1is quick enough for me and I chose that spec because of its performance and reliability.
Although there continue to be some positive new products for Lambretta and Vespas, we don't all want or need them.
5 speed gearboxes for the Lambretta are nothing new but technically it is difficult to fit a pint into a half pint glass.

All joking aside, and I confess to not being an expert, but why couldn't a Lambretta be modified to run with a belt driven auto gearbox like many of our rev and go cousins?
Simple to make, proven to be capable of handling more power than a Lambretta could ever have?

Shoot my idea down if you like, just a idea for discussion.

Cheers