Derp that is a bike isn't it... Grab a modded adder maybe then, I found that for some of the jumps a car worked better even though you would expect the bike to always be superior (pier jump 6 comes to mind...)
I agree with Organic Meatbag, doing a backflip definitely makes you go further. I've done this jump on a fully modded Bati 801 and have overshot the helipad and landed in the water when pulling a backflip!
Yes, some of them are immensely frustrating. A lot of the ones on Elysian Island, for instance, are maddening. On the bright side, after that is the spaceship parts, I'm guessing. They're much, much easier. Make sure you use the Buzzard to get at the one on the bridge strut.
"...and it suddenly busts out of your pants and starts flopping around on your keyboard so you can't tywrtjudfgjktuil tiuly8ruedjtgfncvb" - Nade