What Gearbox to go for !

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Strummer10
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Main scooter: Lambretta LI Special 225
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Hi All, been deliberating but thought I'd float this. Just rebuilding the gearbox end of a motor and putting in new MB strengthened layshaft. Whilst at it was thinking of changing out gearbox from the current Italian GP 200 to look at alternatives. Thinking maybe AF 5 speed, maybe AF close ratio or even SIL GP 200 4 speed. Wondered what opinions were from people's experiences. I prefer a router that can still have it in town. It's aTS1 ….230mm
holty
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Main scooter: lambretta gp
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my choice would be 5speed af, followed by 4 speed close ratio, then sil gp 200 in that order, I am just saving up for a 5 speed, was in there on Saturday and they have had no breakages reported since they did the upgrade
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GTFOMWSC
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Joined: Sat Jan 01, 2011 5:49 pm
Main scooter: GP230 Super Monza CS Tuned
Location: Rugby
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i've changed out all of mine to the AF 4 speeds as on 1 225 and 2 230's transformed the gearing for the 3 of them.Only had 1 issue where i ripped the gear cluster on one but fitted a new one in and so far no problems.Would go 5 speeds in them if i had the cashflow but as a 2nd choice it's my prefered one.
the man don't give a f@@k
Mrnice71
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Nothing wrong with a GP200 box good close ratios , what top end you fitting ?
Strummer10
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Posts: 360
Joined: Thu Oct 11, 2012 7:17 pm
Main scooter: Lambretta LI Special 225
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Just changing things out today, found a new GP 200 Indian box and have it in another bike so might try that in this. It's a TS1 230
Strummer10
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Posts: 360
Joined: Thu Oct 11, 2012 7:17 pm
Main scooter: Lambretta LI Special 225
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I'll get the new layshaft and bearing in whilst still deliberating lol
holty
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Joined: Wed Jul 15, 2015 11:52 pm
Main scooter: lambretta gp
Location: east yorkshire
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your other option is to buy a rayspeed close ratio cluster and first and second gear and use your gp200 3rd and 4th to make up the full set, a good improvement over the standard gp200
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