I roped my ktm 150sx at 97miles
By my research Ktm makes the fastest! This bike would be 2009 ktm 65cc Sx.
NO the internal part and dementioms are diffrent the transmition is very diffrrent wide ratio trans on the EXC .
The fastest fourwheeler in the world is, Quadzille 500 it goes 130 MPH 6 gears.
The fastest dirt bike in the world is an American made 2009 ATK INTINMIDATOR 700 or a 2010 KTM 300 two stroke. As four strokes have become popular in recent times, any 450cc bike can claim the title because there has never been a drag race with all current manufactures included with all variables the same ( rider weight , rider experience, etc ) ever done. Would have to be either the KTM 950 Super Enduro or the BMW HP2 Enduro. Both put out over 100 hp. Worlds fastest custom dirt bike. GSXR 1000 engine on off road suspention and tires. http://www.youtube.com/watch?v=pS5FYrqaAls
Which would be 40.39 miles per hour, if that provides a helpful reference. If, on the other hand, you're inquiring about off-road motorcycles, then we've all misread your question and we can tell you that the KTM 65 is pretty fast.
90mph
65 mphIt is the top speed of KTM 85 sx.
90mph
110mph
The Top Speed Is Around 80 mph
60 mph
About 70mph
KTM recommends Motorex Top Speed 4T 15W50
With stock gearing top speed would be 50-52 mph.
KTM recommends Motorex Top Speed 4T 15W50.
KTM recommends Motorex Top Speed 4T15W50 for the 125SX.
KTM recommends .5L of Motorex Top Speed 4T15W50.