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Well, the ktm 105 sx is a juniour racing bike that goes in the "85 cc class", they have designed the 105 sx to have just that extra power to beat the 85 sx in its class. The 144 sx is pretty much the same consept as the 105 but it is in the 250 f and 125 cc class, they have a full size frame and again more kick in the top end to get you going. But personally, i think the "better" bike is the 125sx, i have one my self and it has just the right amount of power in the top and bottom end. they are also more common, so theres no trouble with parts in your local mx shop.

thanx Jules.

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16y ago

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