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Yamaha YZ80 - 1985. Just how much has it changed?


towiecat
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So firstly, Hi, and thanks for having me, if i should be posting this somewhere else, then would a very kind moderator point me in the right direction? thanks

I just acquired my very first grown up "box of bits," in the form of a good old YZ80, well some of one anyway. that most vital of parts - the engine is not there!

it seems like the bike has not changed much over the years, does anybody have any idea whether the frame / set up will easily take a much later engine? For example looking at the mounts on a 1998 they seem identical. Anybody successfully tried a later engine, or should i just keep looking for a '85?

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Hi,

I own a DT 50 r with DT 80 LC engine... I cant say if the YZ and DT 80 engines are identical, but I can help you with pictures and measurments if needed.

Your bike should have liquid cooling, right?

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Many thanks for the offer,much appreciated.

Yes it is liquid cooled, i will look for some exhaust pics.

At this stage i am thinking mainly of using the same model, just a different year. I will let you know if i start to consider other model engines.

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Easiest way to found out if the engine from newer model will fit is to search on the net for frame photos. That is the way I discover it that on dt 50 R frame cannot fit DT 125 engine (and there are a lot of 125 engine here). So I found a RD 80, wich has the same engine with DT 80. It needed a little modification on the rear engine holder, but it fits.

Originaly, DT 80 has a pipe wich is placed on the left side of the bike, and DT 50 R () and YZ 80 has the pipe from the right side. Currently I`m using old pipe from dt 50, but I think that it is small. That is why I asked for YZ measurments, if it fits to the cylinder I can order a pipe from ebay.

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Welcome towie" take this post to workshop or project section, it will get more views, as its only the diehards lurk in here, to welcome newbies,,, :welcome:

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  • Moderator

Here you go. Shifted to projects.....

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