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gp150 gearing change

Posted:
Sat Jan 02, 2016 12:44 am
by sunrisemac
Happy New Year to one and all, I am thinking of changing the gearbox in my GP150 and would like opinions on which ratios are available to use. The engine is tuned to what I would reckon to be stage 4 or there about and I could do with losing the big jump between 3rd and 4th

Re: gp150 gearing change

Posted:
Sat Jan 02, 2016 1:12 pm
by ToBoldlyGo
If you're happy with it overall an Indian (Vijay Mk1) gearbox would get rid of the jump between 3rd and 4th. Failing that your best bet would probably be the LI150 gearbox.
Re: gp150 gearing change

Posted:
Sat Jan 02, 2016 1:27 pm
by dscscotty
or alternatively use Indian GP200/125 Gearbox which has a very close 3rd to 4th ratio
Re: gp150 gearing change

Posted:
Sat Jan 02, 2016 1:27 pm
by dscscotty
or alternatively use Indian GP200/125 Gearbox which has a very close 3rd to 4th ratio
Re: gp150 gearing change

Posted:
Sun Feb 14, 2016 10:45 pm
by sunrisemac
I thought I'd just update on progress.
I had the weekend to take the gearbox out and change it for Li150 plus a few other jobs.
I had always assumed, (as I did no more than check all the bits when I rebuilt the soot without counting teeth), the gearset in the scoot was SX or GP 150, I was surprised to find that it was in fact a TV200 gearset, I guess that's why it was running out of puff in 4th.....
I now look forward to a bit of decent weather to get the scoot an MOT and give the new gearbox a test.