Scooterotica

I'm about to change my monza 225 gearbox from a gp 200 to an li 150 gearbox. I'm currently running 47/19. Just wondering if it's a good idea to drop down the front sprocket to 18, what's the best sprocket chain combination for this gearbox?


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Your best bet is to have a go with the gearbox calculator on this forum, what was the reason for taking out the gp box ?

https://www.scooterhelp.com/tuning/lam.gear.calc.html

as i cant find it on here now.

you will be going from 4.95 a/all ratio to 4.44, quite a drop , will your barrel tune/carb exhaust combo pull it ok ?
why not try 19/46 on the gp box first ?

I'm changing the gearbox as I don't like the ratios on the gp200 box, big jump from second to third and barely anything from 3rd to fourth. It's an untuned barrel at the moment with a 30 phbh and a tsr exhaust. It pulls fine at the moment but I'm planning a tour tune on the barrel at the end of the rally season with a 60/110 crank so I imagine it should pull well


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Forgot to mention it has full Grp panels so it weighs naff all


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I've got an Innocenti Li 150 gearbox in my series 3.It has a Casa 210 top end with a clubman exhaust,I'm using 16x46 sprockets and it pulls great.

I hope that you have a good clutch as swapping to the LI box and smaller front sprocket will put the clutch under a lot more strain? Your GP200 19 front is giving the current clutch a very easy life.

Adam

I've had a nightmare with the current clutch slipping like a bitch but I'm changing it for a cassette clutch so I'm gonna sort all the gearing out at the same time


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I run li150 46x16 4.9 on both my ts230 with cassette clutch and my rb200 4plate with mb springs and no problems

Seems to be the way to go having spoke to a few people


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