You can always click it into a higher gear to make it turn over easier on the Jump Start. I'm sure its more related the the High Compression ratio vs the gearing or possibly the clutch dragging. I can start my Beta (Techno 250) just by sitting (where a seat belongs
) and just pushing forward (in 3rd) and dropping the clutch. Being a Beta and if its a cold start I have to do the backward and forward rocking to free up the stuck clutch 1st. You may want to see if the clutch is completely free when you are kicking it over. Just a bit of clutch drag makes starting it a bitch.