I am in the middle of fitting an Imola to my GP150, looking at the gear ratio it has a 46/15 = 5.65 with a 80 link chain, question is will this be ok or should I change the ratio. Haven't bought the carb or the exhaust but probably going with 30m and JL or Franspeed exhaust.
Cheers
Imola gear ratio
Depends on your weight,whether your going 2 up,which JL you use etc etc.
I would suggest 5.2 final drive maybe 5.0.
Its a bit of a pain to get with a GP150 box as it means a 48t crownwheel.
If the gearbox is Italian you will find the Imola doesn't like the jump between 3rd and 4th. The higher you keep the ratio the less of a problem this will be.
Indian GP150 boxes have less of a jump between 3rd and 4th.
I would suggest 5.2 final drive maybe 5.0.
Its a bit of a pain to get with a GP150 box as it means a 48t crownwheel.
If the gearbox is Italian you will find the Imola doesn't like the jump between 3rd and 4th. The higher you keep the ratio the less of a problem this will be.
Indian GP150 boxes have less of a jump between 3rd and 4th.
I ran mine at 5.7 for a year or so, it was a lot of fun. Now at 5.3 and don't think I'd want to go much lower. (Delly30 & JL3, one up plus rally gear). I'd try the 5.65 for a while, it should put a smile on your face!
Weel 17/48 gives you 5.2. Could work out expensive with crownwheel sprocket and chain. Or 5.0 is 17/46 so just a 81link chain and a front sprocket.
The new imolas are a lot torquier than the old ones so it should pull that.
The new imolas are a lot torquier than the old ones so it should pull that.
Try what you've got first before altering anything, yes your ratio is a bit on the low side for long distance stuff but for around town it will be fun. Diablo mentioned the gap between 3rd & 4th but that gets worse if you lower the ratio ie raise the gearing so bear that in mind. Standard Gp 200 gearing of 5.22:1 would be ok OR Li 125 with16/47 , 81 link chain will give you 5.42:1 which is in between the GP200 and what you have now. However I'll say it again try what you have then work out what you want to do
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My early Imola was fantastic with 5.3 -16 x 46 Pacemaker [or possibly 5.4 - 16 x 47 it was a few years ago 
], TMX27 and scootrs exhaust. Thought I could improve the top end with 5.0 [17 x 46] and Devtour but it killed the performance, headwinds and hills became 3rd gear which was never a problem previously.
], TMX27 and scootrs exhaust. Thought I could improve the top end with 5.0 [17 x 46] and Devtour but it killed the performance, headwinds and hills became 3rd gear which was never a problem previously.4.9 Clubman
5.2 ScootRS
5.4 JL4
5.2 ScootRS
5.4 JL4