Question

I have gotten to the last bicycle ramp in the top right corner of the secret entrance to the cave under the bridge but even in 4th gear it wont jump two spaces to the place you need to be to get TM26.

Answer 1

It is found in Wayard cave. To find Wayard cave watch this video.
It can also be bought for 48 battle points at the battle frontier. Hope you find the video easier to follow than I did.

Answer 2

You can find a very easy to follow video here. Skip to 3:00. What he does for the last jump is go down and gain momentum, then turn and jump over the rock. Then he follows the path and goes up into a small room where the TM is located.

Hope I helped! :)