Yet another CRF 250 Build but its my first so... ;)

[Dave Daum]

Bike looks awesome! Congrats!

On your battery fitment, it's great that it's so snug, but I highly recommend doing a proper mount, both for your safety, the safety of others and for the battery's protection. If you were only riding street then it wouldn't matter, but if you're doing MX, the stresses g-forces that a bike endures while on the track need to be accounted for.

The way it's resting directly on the motor is not ideal, and one hard hit could put undue stress on that part of the motor casing, and even worse, on that very nice metal case of the battery. Don't forget, there are cells right underneath that... you did design it after all.

Also, in the case of a bad crash, if the battery is not properly secured, you very well could have a 50 pound projectile flying towards who knows where. Not ideal.

I will send you photographs of how I attached my battery. I was in the same situation as you. I am happy to cut and ship brackets to you. Look for photos today.

 

[Dave Daum]

@bayodome
sure thing no worries I will fix that battery in its place.
It will get support from right, left, bottom and one open closable bar from the top.
I will grind off some more from the top of he motor anyway to gain space for the support frame.

 

[DonCox]

Dave that looks great on the battery mount system. One thing I try to do is to not have the battery touch the motor, We found in the hotter summer days here in the Southwest USA, that the battery will overheat before the motor, so if it doesn't touch or connect to the motor, none of the motor heat will transfer into the battery.
And as @bayodome mentioned is securing the battery for the worse case scenario, endo, bike flipping. The battery will try to get out... I sure know motocross has sent me for some for some wild rides.

 

[Dave Daum]

Dave that looks great on the battery mount system. One thing I try to do is to not have the battery touch the motor, We found in the hotter summer days here in the Southwest USA, that the battery will overheat before the motor, so if it doesn't touch or connect to the motor, none of the motor heat will transfer into the battery.
And as @bayodome mentioned is securing the battery for the worse case scenario, endo, bike flipping. The battery will try to get out... I sure know motocross has sent me for some for some wild rides.

Hello @DonCox, you are completely right about the heat transfer and the need to secure the battery. The battery on my mount has a small gap with EVA foam between the motor and the mount. Like @bayodome did with his YZ, the bottom cradle secures the battery very tightly. Over the top I'm running a 2 inch wide nylon web strap with an over center latch to prevent any vertical movement. It is very simple and effective. I'll try and post some detailed photos over the next couple of days.

 

[Dave Daum]

Hello @DonCox, you are completely right about the heat transfer and the need to secure the battery. The battery on my mount has a small gap with EVA foam between the motor and the mount. Like @bayodome did with his YZ, the bottom cradle secures the battery very tightly. Over the top I'm running a 2 inch wide nylon web strap with an over center latch to prevent any vertical movement. It is very simple and effective. I'll try and post some detailed photos over the next couple of days.

 

[Dave Daum]

Quick install Enduro kit. Street, trail or track...