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Gearing change
Posted: Thu Feb 05, 2015 12:57 am
by kevspeed
Totally out of my area,this one,but here goes.........................
I am considering an auto conversion on a Lambretta,i want to keep the wheels at 10'',the engine I have has 12" wheels!
How can I convert the gearing so that the ratio's are the same with the 10" wheel fitted as they are now with the 12" wheel??
Re: Gearing change
Posted: Thu Feb 05, 2015 10:54 pm
by DigDug
Auto's usually have a reduction gear set-up on the rear axle so you could change these but I would imagine that you'd need to have them made rather than being able to buy them off the self.
Re: Gearing change
Posted: Fri Feb 06, 2015 11:04 am
by shocky
http://beedspeed.com/gear-kits-c-74_227_252.html
what engine are you using im guessing its not the typhoon 125 as that had 10 inch wheels are you goingto kit it if its a 125 my dragster was a 125 with a 180 upgear kit fitted I dont know if the 180 upgear kits are the same ratios as a standard 180
again I dont know if a typoon 125 with 10 inch wheels at 70 mph with have the same rpm as say a dragster with 12 inch wheels at 70 not much help but hopefully some food for thought
Re: Gearing change
Posted: Fri Feb 06, 2015 12:27 pm
by kevspeed
The engine is from a 'Direct bikes' 125cc 4 stroke,so no real information!