Both the gears for the Mid and regular optima look the same, are they?Franco
Yes, they are.
where can I get a belt drive conversion kit for an optima. I can't find one on ebay and I have been looking for a little while now. Either an original kit or reproduction would be fine. I'd even settle for buying the parts separately if I can't get the kit. I am also looking for a plastic front bumper. Original or reproduction would be ok.
You can find some diff gears for optima mid and the belt too. It will be cheaper than a conversion kit.My chap TOM uses his optima with these without the little pulley and a 11T motor without fear :DHowever, Jürgen and Antonia Hach sell some belt and gearbox on ebay.For the OT-15 bumper, just look on ebay and tamiyaclub. They are sold out everywhere (not surprising for a 20 years old part though)...
Has anyone compared the 2016 Optima belt (0T227) to a vintage OT89? It looks to me (from photos) like they've changed the pitch. I guess this means that the claimed parts compatibility only goes so far :-) Similarly, I noticed that the bearings that go on the outside of the diffs have changed from 14x8 to 15x10! I would assume that would mean that any vintage owners replacing gearboxes with re-release versions would find that their diffs have a bit of play in the gearbox housings. I was thinking about upgrading my vintage Optima's rear transmission with the re-releases 48 pitch slipper arrangement, but given the change in belt/pulley pitch I'll also have to replace the belt and upgrade the front diff too.
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