Scooterotica

I've just built a GT with a LI 150 box on standard sprockets 15/46. I'd say it was under geared, which was handy for the highland hills I'd been on at the weekend on the A roads it's pretty loud at 60 mph. Anyone recommendations welcome

16/46 on that box. I tried 17/46 but it didn't quite pull it. Somewhere between the two might be ideal.

That's with an mb/bgm Clubman

Agree with the above, you can run 17/46 but this is better with a 30mm and an expansion. All in the manual BTW

What sprocket set up & chain for a GT 186 with BGM clubman & cyclone? 28mm Dellorto jetting would be very helpful too.

cheers

I was running Li150 17/46 with my GT186 (60/110 crank)/30mm Delly/Fran Race but found it struggled to pull the gearing a little so changed to 16/46 which is much better.

My GT200 kit with 30mm Delly and BGM Clubman pulls Li150 17/46 gearing no problem

Just been out on a jetting run.

GT186 with extra boost port in the casings and cylinder, LI150 16/46, 30PHBH with Ram Air and TSR Evo exhaust.
Clocked a GPS of 70.46 mph and Im 16.5 stone.

Im very happy with that and glad I listened to the advice here and on LCGB and from Richard Taylor to go the 16t front instead of the 17.

hi Donnie that sounds great how was the tsr evo to fit ther has been a few on here having trouble lining them up

As did I, it was terrible mate. I would say i would never buy another, though of course I managed to adapt the exhaust hangar that was the main problem so of course if i bought another I would simply reuse the current hangar I guess. But I would not recommend them after this hassle.

Oh and another problem is the rear exhaust hangar bracket for the tail pipe. It all fits fine, however you will (or I did) have to cut your panel as the panel hits where the hangar is connected to the engine casing :-/

On saying that it's performance is good, power band is awesome but im sure no different from a franspeed that I likely should have bought in the first place.

tsr2 by Donnie Canning, on Flickr

tsr1 by Donnie Canning, on Flickr

I'm building a GT 186 engine to run with a 28mm PHBH, BGM clubman and a 60mm crank with a 110 rod. I have a 150 Li gearbox and I'm torn between 16 x 46 and 17 x 47 gearing. Will 17 x 47 be a little too tall for the set up, any advice ?

17/47 gives you 4.7 and 16/47 gives 5.

I tried both on mine with 30phbh and bgm clubman. 4.7 was unpleasant but 5 was nice. I'm running a 58 stroke crank though.