Giant Prime Hybrid help needed

[Baz the balloon man]

Hi everyone

I bought a Giant Prime Hybrid from Saint Luke’s Hospice on e bay .

It has the Mid Drive Yamaha motor

They are not now allowed to sell me the SH battery or a PAC tested charger.

I thought when I went to pick it up I may have been able to find a way to get it no luck though.

I do not want to spend 600 odd quid on replacement’s.

Does any one know a HL or other half decent after market new battery can be fitted and is it worth the effort. ?

at the moment I am trying to sell the motor to get my money back and them sell the rest of it in bits.

If I can fix it I will sell my wife’s pendalton Somerby and keep it as it’s a better bike I think !!!

pls see photos

Its on sale on here eBay and the Gumtree

Cheers

Baz

 

[saneagle]

Generally, you can only use the Giant stuff on Giant bikes because they use a special version of Yamaha, so Yamaha stuff won't work, neither will the Yamaha hacks. You need to find out if yours is a natural Yamaha system. If it is, you can use a hack to fit a standard Chinese battery.

Yamaha ebike dongle to use any 3rd party battery by Albert van Dalen on Tindie

Yamaha mid-drive motor hacking dongle to use any 3rd party battery instead of the expensive Yamaha battery

www.tindie.com

 

[Baz the balloon man]

Thanks I will have a look

 

[Baz the balloon man]

That’s a good piece of kit .

How do I find out if it’s a natural Yamaha motor ?
And then will the controller be Yamaha
I am assuming that the controller is part of the motor ?

Do I need to take the motor off and open it up ?

 

[Baz the balloon man]

Without looking in the motor The Yamaha Motor has Yamaha brand on it
However the battery is a Giant Brand Pylion made in china is that any help ?

 

[chris_n]

You should be able to find some answers here https://www.pedelecforum.de/forum/index.php?forums/yamaha.46/
The site is in German but you can use the translate function on most browsers. Look at the reverse engineering thread or the threads that are highlighted Giant. There is one Hungarian guy on the reverse engineering thread who has some experience with Giant, you will be able to find him as he usually posts in English, you could ask him for help.

 

[Baz the balloon man]

Thanks Chris
I just got back from the pub so I will have a look over the weekend .

I just bought a volt meter to have a look at the dishwasher I think I am very interested in doing an electronics courses .
Any advise one one to do one that helps with motors and building batteries ? Would be welcome

 

[soundwave]

the batt and motor are can bus locked nothing 3rd party will work with it and no way to hack it either as giant use the yamaha motor but make there own bms and motor controllers displays.

the og yamaha motors use uart programming and a hack chip can be used but not on the giant stuff.

 

[soundwave]

can you have the batt and charger if you pick it up as most bike shops wont even post batts that big?