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4.8 or 5.0 gears on a RB20?
Posted: Sun May 10, 2009 9:14 pm
by ArKaTxU
Hi.
I dont know what to do.
I have a jet200 (std 4.8) and Li150 (16x47 = 5.0) gears to put in a future project with a RB20.
The engine that i want to do:
RB20
Mikuni TMX35
Franspeed JL tourer
I am 16 stone and always ride solo.
Can you recommend me what to do?
Thanks!
Re: 4.8 or 5.0 gears on a RB20?
Posted: Sun May 10, 2009 9:18 pm
by sean brady scooters
maybe change your gearing to 5.2..........or go for 225/250cc...........

Re: 4.8 or 5.0 gears on a RB20?
Posted: Sun May 10, 2009 9:26 pm
by ArKaTxU
sean brady scooters wrote:maybe change your gearing to 5.2..........or go for 225/250cc...........

Sorry but i dont know anything about how works the gears on the Lambrettas
I thought that the RB20 and this exhaust is ok with 4.6 to 5.0
Re: 4.8 or 5.0 gears on a RB20?
Posted: Sun May 10, 2009 9:28 pm
by bazman
I would have thought the li box and that ratio along with the tourer exhaust would be ok.
Personally i'll be going with the af close ratio box and franspeed race along with 30mm delly and maybe ratio of 4.8

Re: 4.8 or 5.0 gears on a RB20?
Posted: Sun May 10, 2009 9:32 pm
by ArKaTxU
bazman wrote:I would have thought the li box and that ratio along with the tourer exhaust would be ok....
with the li std 5.2 box? or the 5.0 ratio with 16x47?
Re: 4.8 or 5.0 gears on a RB20?
Posted: Sun May 10, 2009 9:38 pm
by bazman
ArKaTxU wrote:bazman wrote:I would have thought the li box and that ratio along with the tourer exhaust would be ok....
with the li std 5.2 box? or the 5.0 ratio with 16x47?
5.0 IMO.

Re: 4.8 or 5.0 gears on a RB20?
Posted: Sun May 10, 2009 9:54 pm
by sean brady scooters
this may sound a bit strange........but i now know from experience.......that if someone tells me they weigh 16 stone............in reality they may well be 18/19 stone....
likewise .........if they say .....i,m only 12 stone...........they will be now 14.........
unless someone has just weighed themselves the day before............and not THREE years ago..........take it as a pinch of salt.............meaningless ..in terms of tuning scoots and recomending set ups/gearing.............

Re: 4.8 or 5.0 gears on a RB20?
Posted: Sun May 10, 2009 10:03 pm
by ArKaTxU
Re: 4.8 or 5.0 gears on a RB20?
Posted: Sun May 10, 2009 10:05 pm
by bazman
sean brady scooters wrote:this may sound a bit strange........but i now know from experience.......that if someone tells me they weigh 16 stone............in reality they may well be 18/19 stone....
likewise .........if they say .....i,m only 12 stone...........they will be now 14.........
unless someone has just weighed themselves the day before............and not THREE years ago..........take it as a pinch of salt.............meaningless ..in terms of tuning scoots and recomending set ups/gearing.............

I just weighed myself after 1st post.....wheres that slim fast gone
Still going for 4.8 on mine though!!
Re: 4.8 or 5.0 gears on a RB20?
Posted: Sun May 10, 2009 10:07 pm
by bazman