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1978 DT175 Rebuild and Restoration.
https://vintagedirtbikeforums.alp-sys.com/viewtopic.php?f=28&t=3808		 Page 4 of 8
Author:  Gfrench [ Sun Oct 07, 2012 8:22 am ]
Post subject:  Re: 1978 DT175 Rebuild and Restoration.
Your bike is looking good and sounds Great Dave!
Author:  Dave [ Mon Oct 08, 2012 10:40 am ]
Post subject:  Re: 1978 DT175 Rebuild and Restoration.
thanks! i am so glad you found me here. :D
Author:  Endurodave [ Wed Oct 10, 2012 5:16 am ]
Post subject:  Re: 1978 DT175 Rebuild and Restoration.
Dave,

Just ran across your trend, impressive work on the DT…. Thanks very much !! for the time and effort put into sharing.
Author:  Dave [ Thu Oct 11, 2012 8:26 am ]
Post subject:  Re: 1978 DT175 Rebuild and Restoration.
Endurodave wrote:
Dave,

Just ran across your trend, impressive work on the DT…. Thanks very much !! for the time and effort put into sharing.

no problem there! glad and very thankful you responded. :D
Author:  Dave [ Fri Oct 12, 2012 12:45 pm ]
Post subject:  Re: 1978 DT175 Rebuild and Restoration.
i did some more work,this time on the horn and i did improve it some,still not a super loud horn and almost on par with my 1975 DT400 and 1968 DT1.

i used this tool to test the horn,click the image to play the video,it is the first time i used it on a 6 volt system and it works great for that too.

i used it to put a straight 6.3 volts to the horn and it sounded much stronger than it did hooked up to the bike's electrical system.
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this is battery voltage with the key off.
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this is voltage at the battery with the key on.
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these are pics of the LH switch as it is being taken apart.
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Author:  Dave [ Fri Oct 12, 2012 12:53 pm ]
Post subject:  Re: 1978 DT175 Rebuild and Restoration.
i found a bit of oxidation in the switch contacts.
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this is a before and after set of videos.

this is before.
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this video is after the horn switch was cleaned up,it is a bit better than before but it is not super loud.at least now a MVI inspector should hear it over the engine.
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Author:  shntat [ Tue Oct 23, 2012 10:53 am ]
Post subject:  Re: 1978 DT175 Rebuild and Restoration.
i am currently converting my dt175e over to 12v electric start.
do you know if the starter generator off of a 75 dt125 will fit?
Author:  Dave [ Wed Nov 07, 2012 10:44 pm ]
Post subject:  Re: 1978 DT175 Rebuild and Restoration.
shntat wrote:
i am currently converting my dt175e over to 12v electric start.
do you know if the starter generator off of a 75 dt125 will fit?

little to nothing will interchange on the 74-76 125 and the 78-81 125,they are totally different from one or another.the engine in particular besides the chassis is totally different.
Author:  dwil4 [ Wed Nov 21, 2012 11:55 pm ]
Post subject:  Re: 1978 DT175 Rebuild and Restoration.
dang man i finally found you. been looking for someone from yamahaenduro.com to see if its still up and running??? saw gfrench on here also.. :) ill send you my email thru pm and maybe you can let me know whats up and how the dt is coming..
Author:  Scootern29 [ Fri Dec 14, 2012 8:35 pm ]
Post subject:  Re: 1978 DT175 Rebuild and Restoration.
If you guy's are waiting for a response from Dave, it will be awhile. He is in the hospital and is doing better as of today. He should be back soon.

Scott
Author:  dwil4 [ Fri Dec 14, 2012 10:17 pm ]
Post subject:  Re: 1978 DT175 Rebuild and Restoration.
:( thanks for the update! hope he has a speedy recovery!
Author:  Scootern29 [ Fri Dec 14, 2012 10:36 pm ]
Post subject:  Re: 1978 DT175 Rebuild and Restoration.
As of tonight he will be in the hospital till after Xmas. He had to have surgery but is doing well.

Scott
Author:  dwil4 [ Sat Dec 15, 2012 11:05 pm ]
Post subject:  Re: 1978 DT175 Rebuild and Restoration.
glad he is doing good...Thanks
Author:  Dave [ Mon Feb 18, 2013 7:43 pm ]
Post subject:  Re: 1978 DT175 Rebuild and Restoration.
i am back with a Vengeance guys!

thanks!!!! :D

if there is mispelling,it is because i am not on my normal Firefox Browser and on IE Explorer in Windows 7 right now.
Author:  Dave [ Fri Feb 22, 2013 4:38 am ]
Post subject:  Re: 1978 DT175 Rebuild and Restoration.
here is a ride video,it is simply jetted too rich for now,the engine has just over 100 miles on it but according to the man that did my cylinder it is ready to start tuning for power.

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i was hitting 60-65 mph and on on the return trip but it started to run out of fuel.

i reached down and turned the fuel back on so it saved the engine.

this bike is already much faster than a stock 1978 DT175 as most of them struggle to reach 55 mph,let alone 60!

the blubbering is the hint of this as it blubbered at 6500 rpm.

this engine has the stock 24 mm carb on it currently. the 26mm YZ 80 carb and with a tuned pipe should be good for 10,000 rpm + .i am running a RT180 pipe right now because the 1978 DT175 pipe is truly horrible.

i also need to upgrade the clutch with Barnett Plates.even in it's weakened form the clutch slips slightly shifting into 6th gear.
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