Vintage Dirt Bike Q & A
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1977/75 DT 400 swap
https://vintagedirtbikeforums.alp-sys.com/viewtopic.php?f=28&t=1826
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Author:  Roost [ Tue Apr 15, 2008 8:30 am ]
Post subject:  1977/75 DT 400 swap

Hello,

Ive got a 1975 DT 400 with a bad top and bad crank. Ive found a good running 1977 DT 400, will the 77' fit into the 75' frame? I dont want to do any serious conversions just looking to swap it out. Thanks in advance for any info.

--Roost--

Author:  Dave [ Wed Apr 23, 2008 3:42 am ]
Post subject:  Re: 1977/75 DT 400 swap

i have never tried it myself.you might have to remove the engine in the 75 and compare it to the 77 engine,mounts wise and all that,note how the exhaust port is,stuff like that.you might try asking this questions at http://65.12.209.183/yamahaforum/index.php you will have to join there to post but there is many experts on the DT's there.there is a guy named Endurunut there.he is quite the guru.he might know.there is some guys there that know about the 77/78 DT400 and there are many members there with the 75/76 models there too.i own a 75 model myself.

Author:  buzzchoptop [ Sun Sep 20, 2009 12:38 am ]
Post subject:  Re: 1977/75 DT 400 swap

I just bought a 1978 DT250 project. Do you have any parts left over from the '77? I think they are the same!

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