been looking for an emergency jump starter for my motorcycle, i find one at dealsplus: https://www.dealsplus.com/Automotiv...able-car-jump-starter-400a-peak-6000mah-up-to
It seems as small as a power pack for cellphone, will it really work?

 

Depends on how much cranking is required to start the bike. It claims 400 A peak output, and a 6000 mAh capacity. If you work it out, that means it will deliver that 400 amps for about 30 seconds.

Don't motorcycles still have kick-starters?

 

Welcome to AAC!

It seems as small as a power pack for cellphone, will it really work?

If it can start a car, should have no problem with motorcycles unless you have a huge engine.

 

Depends on how much cranking is required to start the bike. It claims 400 A peak output, and a 6000 mAh capacity. If you work it out, that means it will deliver that 400 amps for about 30 seconds.

Don't motorcycles still have kick-starters?

From about the 80s on - a lot don't.

the last motorcycle I had was so knackered, there wasn't a snowflakes chance in hell of getting it going with the kick starter - getting it going with the electric starter wasn't a forgone conclusion either.

10x Ni-Cd D cells will get the job done.