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RC51 Battery box help

  1. #1
    TWINS! xrocket21's Avatar
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    RC51 Battery box help


    I have an aftermarket tail on my RC51 and I just cant seem to keep the battery in place. I dont have the stock tail to work with and I dont see any aftermarket stuff. Any RC51 guys on here run into this and have a good solution short of fabbing my own out of aluminum?

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  2. #2
    Lifer loudbeard's Avatar
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    Re: RC51 Battery box help

    Pics!

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    I went to MMI I know what Im doing here chief

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    Re: RC51 Battery box help

    Quote Originally Posted by loudbeard View Post
    Pics!
    Id be embarrassed for any of you to see the current duct tape, tie wrap, broken plastic, safetywire rig that is in there now....

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  4. #4
    Senior Member jeantarrou's Avatar
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    Re: RC51 Battery box help

    I ended up "fabricating" one out of aluminum, I'm pretty much a hack with that stuff but it didn't look too awful. If you've got some extra cash to spend the battery relocation kits for 51's are pretty sweet. Actually, those probably wouldn't be a huge diy challenge?

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  5. #5
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    Re: RC51 Battery box help

    Quote Originally Posted by jeantarrou View Post
    I ended up "fabricating" one out of aluminum, I'm pretty much a hack with that stuff but it didn't look too awful. If you've got some extra cash to spend the battery relocation kits for 51's are pretty sweet. Actually, those probably wouldn't be a huge diy challenge?
    Got any pics of your setup?

    I had never heard of the battery relocate, looks interesting, but I dont think I want to go that route.

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  6. #6
    Senior Member jeantarrou's Avatar
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    Re: RC51 Battery box help

    Quote Originally Posted by xrocket21 View Post
    Got any pics of your setup?
    I knew you were going to ask! I definitely had pics of it, let me see if I can dig them up.

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  7. #7
    Lifer Garandman's Avatar
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    Re: RC51 Battery box help

    I can 3D print one out of ABS, would need a dimensioned sketch

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  8. #8
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    Re: RC51 Battery box help

    Quote Originally Posted by Garandman View Post
    I can 3D print one out of ABS, would need a dimensioned sketch
    !!!!!!!!!!!!!!!!!!!!!!!!!!! that would be sick!

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  9. #9
    Lifer Garandman's Avatar
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    Re: RC51 Battery box help

    Because batteries are rectilinear taking dimensions iseasy.

    Made this to use a Li battery in the TW200. Rev 1.



    This was made to test fit a replacement on the R90, which has a giant battery but modest electrical needs. I’ll replace the stocker when it wears out with another Li battery, maintain stock look and have storage space.



    Your timing is goidas Im going to be house-bound a while after surgery. The printer will do 8”x8”x6” in one build.

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    Last edited by Garandman; 08-16-19 at 11:50 AM.
    1975 BMW R90/6 | 2008 Triumph Tiger 1050 ABS | 2009 Honda CRF100F | 2009 Yamaha TrailWay 200 | 2012 Yamaha WR250R | 2016 Honda CB500FA | 2016 Suzuki GSX-R750

  10. #10
    TWINS! xrocket21's Avatar
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    Re: RC51 Battery box help

    Well, i pictured something more complex, but it is tight and the subframe i pictured it hanging from is where the seat rests.

    RC51 Battery box help-20190819_165533-jpg

    RC51 Battery box help-battery-box-jpg

    This is what i was thinking, it should hook over the crossmember. The crossmember itself is 5/8", so maybe just a touch bigger. Maybe if the semicircle went like 200 degrees instead of 180 it would kinda snap on. The rear would just rest on the tail i guess.

    @garandman

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  11. #11
    TWINS! xrocket21's Avatar
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    Re: RC51 Battery box help

    Since I'm leaning toward a much simpler design, Im wondering if I should just try thermoforming some Kydex

    https://www.amazon.com/Plastics-2000...ateway&sr=8-10

    edit: Im kinda second guessing Kydex, with the v-twin setup the battery mount is kinda close to the rear header, it definitely gets hot under there, I wounder if Kydex would soften up...

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    Last edited by xrocket21; 08-20-19 at 10:16 AM.

  12. #12
    Lifer Garandman's Avatar
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    Re: RC51 Battery box help

    Kydex seems to have a Heat Deflextion Temperature of 150-170.

    3DP ABS is around 200.

    I suspect either will work.

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  13. #13
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    Re: RC51 Battery box help

    RC51 Battery box help-20190823_162220-jpg

    RC51 Battery box help-20190823_162413-jpg

    Well, it went great. I got super thick kydex and made a pretty nice jig to form it. Seems to be working and hasnt softened up!

    Thanks guys.

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    Last edited by xrocket21; 08-30-19 at 01:40 PM.

  14. #14
    Senior Member jeantarrou's Avatar
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    Re: RC51 Battery box help

    Finally got around to looking for some pics, unfortunately no luck... Your mock up looks pretty similar to what I remember mine too look like, what I also remember is finding a good spot for the ECU was a pain, and I secured the tipover switch and the fuel pump relay to the back of the tray. PCIIIr I'm not sure where that ended up, and at the time it was a track only bike so I didn't have any of the lighting relays.

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  15. #15
    Lifer Garandman's Avatar
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    Re: RC51 Battery box help

    Looks good!
    Quote Originally Posted by xrocket21 View Post
    Well, i pictured something more complex, but it is tight and the subframe i pictured it hanging from is where the seat rests.
    3D printer doesn’t care about complexity. You can have variable wall thicknesses, any shape, doesn’t really matter.

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    1975 BMW R90/6 | 2008 Triumph Tiger 1050 ABS | 2009 Honda CRF100F | 2009 Yamaha TrailWay 200 | 2012 Yamaha WR250R | 2016 Honda CB500FA | 2016 Suzuki GSX-R750

  16. #16
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    Re: RC51 Battery box help

    Quote Originally Posted by xrocket21 View Post
    Well, i pictured something more complex, but it is tight and the subframe i pictured it hanging from is where the seat rests.

    RC51 Battery box help-20190819_165533-jpg

    RC51 Battery box help-battery-box-jpg

    This is what i was thinking, it should hook over the crossmember. The crossmember itself is 5/8", so maybe just a touch bigger. Maybe if the semicircle went like 200 degrees instead of 180 it would kinda snap on. The rear would just rest on the tail i guess.

    @garandman

    You're not supposed to remove the tray when you put those on. I have had 4 RC51's you cut the whale tale off and a little of the bottom of the box keeping the sides. The whole idea is to keep the battery box. I have had 3 different undertail covers. You really need to just spend the $25 or $30 to get a cut battery tray. Stock ones are $$$$$ but you can get the cut ones all day. Otherwise you are making a lot of work for nothin...

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  17. #17
    TWINS! xrocket21's Avatar
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    Re: RC51 Battery box help

    Quote Originally Posted by Beinggodisgreat View Post
    You're not supposed to remove the tray when you put those on. I have had 4 RC51's you cut the whale tale off and a little of the bottom of the box keeping the sides. The whole idea is to keep the battery box. I have had 3 different undertail covers. You really need to just spend the $25 or $30 to get a cut battery tray. Stock ones are $$$$$ but you can get the cut ones all day. Otherwise you are making a lot of work for nothin...
    I bought the bike used in 2008 and it was already gone.

    Im good with my setup now, works great!

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