Scooterotica

Which gearbox and sprockets would go best with a 175, poss 30mm Dell and clubman spout. Thanks if you can help

li 150..........15/16........46 depending on state of tune...............

Sorry to jump on this thread but is a gp 150 gearbox any good for a tuned scooter? I've heard the gap between 3rd and 4th is quite big.

ying,ying,ying..........whuuuuur.................
sx 150.........gp 150..............are without doubt the worst boxes ........especially for tuned scoots

errrr! anybody want to buy a good second hand 150 box.....lol

I've run an SX150 box (46/17 sprockets) on a tuned SR190, 28ml carb, and clubman for a couple of years. It's been fine on this. In my experience, you get used to the box and ride accordingly______quick and fast through the gears but maybe that's just the way i like to ride .

I'm just doing a rebuild on the engine and will be fitting a fresco. My experience so far has not told me that I need to go to the expense of changing the gearbox.

For a lot of road scoots, it's OK. If you're running a race bike, or anything approaching TS1 performance with an expansion then, yes, I think you'd need to think about another gearbox. Hope this helps

To answer the original post, I can vouch for a 125 Special gearbox (same as GP125) with 47/18 sprockets. This gives GP 200 gearing and I've run it for several thousand miles on both a 175 conversion and a 186 Mugello with a Clubman and various carbs from 20 to 28mm.

125 boxes are very good............also.
sx150/gp150..............will of course benefit a lot from any extra cc above 175..............
the added CC and possible tuning/or just a better kit.........will provide more power/torque ,which would enable you to cope better with said box..................
having said that............they would still benefit lots from a better box..............

So what about a SX 200/TV 175 gearbox then, i've heard these are good for tuned motors with the correct sprockets which i suppose is to ease the big jump from 3rd to 4th, any opinions or advice on the sprockets.What about 46/16?

Pacemaker with 15 x 46 should work well on a 175. SX 200 box will be too tall with 15 x 46 never mind 16.