Battery Sizes for minitwin

It came off a BMW G650X May just be a duff battery.

[andrewsmith]

It does sound like a kaput battery as that should start it without no issues.

I have a LiPo battery built from 8x A123 cells, same as Maviryk sells. Starts the bike with no problem at all, 4.6Ah and 700g.

Unless you have a big compression bored and stroked motor, there is something wrong if an 8Ah battery won't fire it.

Originally Posted by yorkie_chris

Maviryk design battery is probably cheaper.

Yes you're right, the Marviryk batteries are around £11 cheaper (at todays exchange rate)

but, when you add in postage to the UK the B&W battery is £9.41 cheaper ($45 shipping to the UK vs £8 Special Delivery)

Nothing has been done inside the motor as per minitwin rules, I know the batteries I tried it with were replaced for a better one, maybe this is why. Starter relay is having none of it though. Still goes on my standard battery.

Originally Posted by GrahamB

Unless you have a big compression bored and stroked motor, there is something wrong if an 8Ah battery won't fire it.

Have a look on Ebay for a VARTA YTX7L-BS Gel. I got mine delivered for £28 and it could crank a tractor over. Its only half the size of the original too.

It'll allow you to put the starter relay in the battery tray too.



C

I will look into one of these or similar, I will phone around and see what I can get, will post when I get one and how it goes.

Originally Posted by Berlin

Have a look on Ebay for a VARTA YTX7L-BS Gel. I got mine delivered for £28 and it could crank a tractor over. Its only half the size of the original too.

It'll allow you to put the starter relay in the battery tray too.



C

I used a YTX5L-BS all season and never had an issue.

John

Just an update, I got a new battery charger and the battery was dead so I have got a new one on the way