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Anyone have any documentation on yokomo YR4 2 speed transmission? I picked one up with a car as extra parts in the deal, but it's completely in pieces, and I'd like to at least know how it goes all back together.

I'll snap a pic of the components, maybe it's even an aftermarket one? everything is unfinished aluminum, except the one pulley has a light yellow anodizing.

thanks! still looking for an original issue yr4 manual, the one most like an 870c.

Couple of pics of one assembeled...

hi guys
here is a photo of what i think is a yr4 2 speed trany in pieces.
dont think its all there think there is a second shaft missing not sure.
someone told they can go on a yz 10 as well
forgot where i got it from but this is how i got it. be good to see one altogether

Paul1600, that looks more like the Kyosho 2-speed tranny for the Kyosho TourForce TF-1/2/3 and the accompanying pinions.

just found this at the tamiyaclub site
http://www.tamiyaclub.com/showroom_model.asp?cid=46447&id=11147
looks like what i have EvolutionRevolution, cant find photos of the Kyosho unit
i'll have to try to set it up one day on one of my yz10s

jwscab wrote:Anyone have any documentation on yokomo YR4 2 speed transmission? I picked one up with a car as extra parts in the deal, but it's completely in pieces, and I'd like to at least know how it goes all back together.

I'll snap a pic of the components, maybe it's even an aftermarket one? everything is unfinished aluminum, except the one pulley has a light yellow anodizing.

thanks! still looking for an original issue yr4 manual, the one most like an 870c.

Hey mate,

Apologies on dragging an old thread back from beyond the grave.... but was just wondering how you went with finding 2-speed instructions?

I have recently acquired this little beast, and instructions could prove very useful....
I do have a scan of a YR4 manual, but it has no mention of the 2-speed....

Alex

I'll have to check, I no longer have the 2 speed, and I can't recall if I ever saw an exploded diagram. It was very straightforward once I put all the parts together. I think I did see something regarding setting the shift points.