Laverda 500 Rev Counter Drive Gear

[sport53]

Hi, I have an Alpino engine rebuilt to Montjuic spec that I need to order a Rev Counter Drive Gear for. Apparently there is a difference between the Alpino and Montjuic drive gears.

Does anyone know the difference between the Montjuic Rev Counter Drive Gear 41112183 and the Alpino Rev Counter Drive Gear 41112182. This is the gear installed on the end of the inlet camshaft.

Thanks

 

[sfcpiet]

The counter drive only needs to be modified if the Veglia Competizione rev counter as used on the Formula models is fitted. If the stock ND clock is installed there is no need to change the drive.

In the case of a swap, BOTH gears would need to be exchanged, not only the drive worm gear on the cam.

piet

 

[sport53]

The counter drive only needs to be modified if the Veglia Competizione rev counter as used on the Formula models is fitted. If the stock ND clock is installed there is no need to change the drive.

In the case of a swap, BOTH gears would need to be exchanged, not only the drive worm gear on the cam.

piet

Thanks Piet, I do intend to utilise a Veglia Competizione rev counter, however, the rev counter has a 3/1 ratio. So I was thinking the standard drive gear would be correct?

Do you know if my assumption is correct?

 

[sport53]

Thanks Piet, I do intend to utilise a Veglia Competizione rev counter, however, the rev counter has a 3/1 ratio. So I was thinking the standard drive gear would be correct?

Do you know if my assumption is correct?

I should qualify my last post, it’s actually a Borletti Replica of the Veglia Competizione rev counter with a 3/1 ratio.

 

[sfcpiet]

The original Veglia were 5:1 ratio iIrc, necessitating a drive change from the stock 3:1. All twins and triples have 3:1 ratio rev counters, Smiths and Nippon Denso. If your clone is 3:1, it should be just fine with the stock drive.

piet

 

[sport53]

The original Veglia were 5:1 ratio iIrc, necessitating a drive change from the stock 3:1. All twins and triples have 3:1 ratio rev counters, Smiths and Nippon Denso. If your clone is 3:1, it should be just fine with the stock drive.

piet

Thanks again Piet, I do not know for certain what driven gear I have installed in my cam cover. As this was originally an Alpino engine I would think it’s the standard driven gear, but I would like to confirm before I order the drive gear. It’s probably a tooth count difference between the F500 driven gear and the standard Alpino driven gear.
Do you know the driven gear tooth count difference between the driven gear options?