Rapido Race 225 exhaust and gearing recommendations

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Bidsy
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Sun Jun 16, 2019 4:01 pm

Hi, Just starting to build my Rapido Race 225 and looking for exhaust and gearing recommendations.
I have a couple of exhaust options open to me, I have either a JL3 road or a NK road Rally and either LI150, SX200 or Indian GP200 gearboxes, 46 crown various size front sprockets and will be running a 30 mm VHSH Dellorto.
Can anybody please suggest the best combination and suggest final gear ratio.
Preferable more torquey low down than Revy.
Thanks

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db67
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Sun Jun 16, 2019 5:38 pm

Hi, in my opinion I would recommend the the Indian gp gearing (less of a gap between 3rd & 4th)with 19x46 sprocket's giving you a 4:84 4th gear ratio, couple this with the jl 3 it should pull ok, if not a 47 rear sprocket will give you a 4:95 4th ratio, can't comment on the Nk pipe as I've never run one, hope this helps ;)

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ForemanBob
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Sun Jun 16, 2019 10:54 pm

4.8 final drive or there abouts should be perfect for those pipes....

Bidsy
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Main scooter: Lambretta S2 Eibar Li150
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Tue Jun 18, 2019 2:01 pm

Thanks all for the info, so I looks like the GP200 (indian) with a 46/19 seems to be what most suggest but can any body tell me how the JL3 Road and the NK Road Race would differ and if the jetting would be around the same.

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