" Unfortunately they look completely different than the 66' Scr tray, which I believe is a one year only type thing... "
____ The unique battery mounting-tray of the 1966-version of the 250-Scrambler was nicer in that it's platform-base much better held the (originally intended!) stock-battery from getting vibrated all around on it's surface, and it's particular method for securing the battery in-place, was somewhat superior as well.
And while I never bothered to do an exact/measured comparison, I do believe that that complete b.mounting-tray was copied-over from that of the 125-Bronco.
__ The main downside to that particular battery mounting-setup, is that besides the b.tray/platform-mount itself, (which was directly welded to those frame-models it was fitted to), it was expected to retain it's intended battery along-with the help of an added top-piece fitted to the back-plate (of the platform), and that added piece was rather easy to get lost since it was somewhat loosely fitted-into & held by the b.mount's back-plate and strapped-down by a rather poor-quality rubber-strap.
On top of that fairly frequent common-trouble, that top-piece cover-plate was particularly fashioned to snugly fit against/over the unique plastic-cover of the particular*battery which Ducati had chosen to employ for/in those two Duke-models. _ And that particular battery was relatively expensive & uneasy to find, compared to most similarly sized batteries,, so that rather unique battery mounting-tray setup was a general overall PAIN for their owners ! _ And thus those stock cover-plates were simply often outwardly discarded, (if not lost first) !
__ The only other battery, (most common back then), which even came close to the same dimensions (of the stock-battery), was about 6mm thicker,, and so the rear-side slightly-lifted ridge-edge of the platform-base, (which was so nicely spaced & placed for helpfully retaining the thinner stock-battery), would prevent that (common/cheap 6v) battery from fitting squarely down-in on the flat of the mounting-tray's platform-base.
Between that circumstance and the quite unique intended cover-plate top-piece fitment-issue (along with it's poor strap), I've come to have noted quite a number of Duke-owners of such, to have been fairly frustrated with whatever alternate means they had to come-up with to deal with that problematic predicament.
(If only that stock-battery had allowed simple viewing of it's water-level, then that unique battery may have allowed it's [lazy] owners to have gotten it's expected value out of it.)
____ Joe, since there's additional room in front of the rear-fender for a battery that's nearly twice as thick, and since your frame's stock b.mounting-tray has already been removed/destroyed anyhow,, then why not logically consider installing a much better battery retaining method/system instead ?
If I were in your position, I'd start looking for a suitable battery-tray/cage which could possibly be rubber-suspension mounted from-under the frame-tubes beneath the seat.
You could look-through a jap.bike junk-yard for many alternate styles of such b.tray-cages, and likely find a suitably fittable example for such mounting-installation, (without need for messy welding).
__ Otherwise, it's a somewhat difficult-call as to whether to go-through all the trouble of going the route which kmev had bothered to do (to remain as stock), or, attempt to make-use of one of those far-more common regular/std.base-plate only, type of battery-trays, which would preferably allow fitting of a more useful larger-sized battery.
" I have bought one, and they are a very good reproduction... "
____ Joe, did it come complete with the underneath piece of bracing-work that's needed to help support that tray/platform-base ? _ As their presented picture (of their reproduction-work) doesn't look as if that support-brace is included under the presented (otherwise complete) base-plate, (cuz it appears that the tab-bracket [for the fender] is all that's holding-up the base-plate from laying-down flatly, [as seen in the pic] ).
__ Without any support-bracket included to (mainly!) help securely-hold the tray-platform/base-plate (from underneath), I can then certainly assure you that the base-plate will crack (relatively soon) all-around the edge of the intended weld-bead, even if a battery is never supported by it !
____ For anyone interested in more such related posts, here's a link to another/older thread to check-out. -
viewtopic.php?f=3&t=409 Fun-Cheers,
-Bob
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