Gearbox for a mugello?

[leehuggy72]

hi all,

i've got a vijay super gearbox 50,42,38,35 tree 10,12,16,19

28mm pwk keihin
scootrs exhaust
mugello 186 v2
electronic ig

I would love to go with an li box but the funds are sparse at the mo

i've tried to get the most out of what i have and put a 16 front sprocket on.. which i think brings me down to 4.9 final drive

is this ok or should i leave as standard.( advice welcome )

sorry if i'm going over old ground i just couldn't find anything that related to these gearboxes

[sideout]

I tried a Vijay Super Mk2 box with my Mugello 186, PHBH28, JL3 and it would hardly pull 4th .

Changed to a GP200 box and it transformed it. My understanding is that the ScootRS exhaust is even more revvy than the JL3 making matters even worse for you.

BTW the JL3 is often touted as a box that makes it's power low down. It might do compared with a really revvy race pipe, but in my experience it provides little low rev grunt with a Mugello .

Cheers,

Nigel

[leehuggy72]

hi sideout,

mine's the earlier mk 1 box

if the gp200 box is the way to go then i guess i only need to change 3 and 4th loose gears to get a 200 box

[Special X]

I've heard the JL3 described as "like a JL4 race pipe with the lovely top end scream taken out but without any benefit at the bottom end or midrange"

[leehuggy72]

just been on ebay £150 for an li gearbox

how do people afford this

[shocky]

just been on ebay £150 for an li gearbox

how do people afford this

did it sell £60 is about the going rate unless its some dealer ramping the price up like they do with other "rare parts"

[sideout]

I've heard the JL3 described as "like a JL4 race pipe with the lovely top end scream taken out but without any benefit at the bottom end or midrange"

Do you know, I think you've hit the nail on the head! I must stick a clubman on one day for a direct comparison. There really is not a lot of guts below 4500 rpm, but it all comes together after that and flies.

hi sideout,

mine's the earlier mk 1 box

if the gp200 box is the way to go then i guess i only need to change 3 and 4th loose gears to get a 200 box

Ahh, the Vijay Super Mk1 is a better box for your needs I would have thought. The Mk2 has got a huge gap between 3rd & 4th (makes my SX150 box feel like a close ratio ) and a really high final drive. Yours is equivalent to an SX150, but with a reduced jump.

I believe you can't mix and match loose gears and trees. You have to replace loose gears and cluster together. I was lucky when I got my GP200 box, it was a snip at £40 odd about a year ago from a dealer (unfortunately he's put his price up now).

£58 ish from Scooter Restorations at the moment:
http://www.scooterrestorations.com/lamb ... d-cluster/

[bristolmod]

I've got an Italian GP200 box for sale at £50 plus P&P if anyones interested

Can post pix over weekend if required

PM me if interested

NOW SOLD- SORRY

Chris

[leehuggy72]

http://cgi.ebay.co.uk/lambretta-li150-p ... 240%3A1318

People must have money to burn

[byron]

definitely want to change my gearbox after riding a few dual carriageway miles today.
Mugello v.2 with VHSA28 & old Mikeck mk6.
currently got standard Li125 Special gearing. so 6.1 final drive ratio .
at 8000rpm this is about 66mph.
I was thinking of leaving the box as is and playing with sprockets, but what'll pull ?

5.8 ? I've got a 16 tooth sprocket, but not a worn enough chain.
5.4 ? got a 17 tooth sprocket, but would need the 81 link chain
5.2 ? got a 82 link chain, but neither std GP200 sprockets
4.8 ? use the 82 link chain, 46 crownwheel and get a 19 tooth front sprocket ??

I have also got a [early] pacemaker box, but was saving that for the next engine...

or any other combination suggestions welcome