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Makotosun

Yet another DT400 project,the Super DT400.

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Replied by Bigdog302 on topic Yet another DT400 project,the Super DT400.


yeah,I took a wire wheel to them. it cleaned off the sludge and light rust.
2 1968 DT1s,1970 RT1M,1970 DT1C,1971 RT1B,1971 Honda Z50K2,1974 DT100A 1974DT250A,1974 Honda MT250,2 1975 DT400Bs,1975 Honda CR250M1,1978 DT175E,1979 Honda CR250R.
Dave
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08 May 2015 10:18 #31

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Replied by FrankC on topic Yet another DT400 project,the Super DT400.

Can't wait for the video :Excited
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08 May 2015 13:48 #32

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Replied by Bigdog302 on topic Yet another DT400 project,the Super DT400.

my Boyesen reed valve petals came in today.

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part number is 606,the stock 1975-76 DT400 takes these as well the MX400B,77-78 DT400. the applications list for this is huge.

ready to get the petals on.

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2 1968 DT1s,1970 RT1M,1970 DT1C,1971 RT1B,1971 Honda Z50K2,1974 DT100A 1974DT250A,1974 Honda MT250,2 1975 DT400Bs,1975 Honda CR250M1,1978 DT175E,1979 Honda CR250R.
Dave
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Last edit: 08 May 2015 16:04 by Bigdog302.
08 May 2015 16:01 #33

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Replied by Bigdog302 on topic Yet another DT400 project,the Super DT400.

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here is a side by side comparison with the Moto Tassinari V Force 3 Reed assembly. I plan to try these and do a back to back comparison.
after I get a reproduction carb to reed joint.

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2 1968 DT1s,1970 RT1M,1970 DT1C,1971 RT1B,1971 Honda Z50K2,1974 DT100A 1974DT250A,1974 Honda MT250,2 1975 DT400Bs,1975 Honda CR250M1,1978 DT175E,1979 Honda CR250R.
Dave
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08 May 2015 16:08 #34

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Replied by the_trooper08 on topic Re:Yet another DT400 project,the Super DT400.

So much good info in this thread
Thanks!
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Last edit: 08 May 2015 17:19 by the_trooper08.
08 May 2015 17:18 #35

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Replied by the_trooper08 on topic Re:Yet another DT400 project,the Super DT400.

I just ordered the boyesen power reeds. In the book it lists different than what you say.
You mentioned the 606 is the one. In my parys book they list the 77 dt400 as 633? Any idea?
10 May 2015 09:55 #36

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Replied by Bigdog302 on topic Re:Yet another DT400 project,the Super DT400.

sorry about the misinformation. the part number on the 77-78 DT400 is a 4 petal design and takes part 344. I foolishly went by a Ebay seller's listing and it is way off.

here is my parts lookup page here from Yamaha.
www.yamahapartsandaccessories.com/parts-..._%28DT400D_-_1977%29

this is from the Boyesen reeds page. it does not go by model,it goes by HP and the reed petal count. I looked it up by the 119 hp and 4 petal reeds.
www.boyesen.com/power-reeds-247.html

I am very sorry! my bad in the deepest sense! :Ugh

I am still checking and 247 may be wrong too. I am investigating this....
2 1968 DT1s,1970 RT1M,1970 DT1C,1971 RT1B,1971 Honda Z50K2,1974 DT100A 1974DT250A,1974 Honda MT250,2 1975 DT400Bs,1975 Honda CR250M1,1978 DT175E,1979 Honda CR250R.
Dave
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Last edit: 10 May 2015 10:20 by Bigdog302.
10 May 2015 10:12 #37

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Replied by the_trooper08 on topic Re:Yet another DT400 project,the Super DT400.

Haha no biggie. Im just going by what the parts canada book says. Ill believe their numbers for now. I cant believe they still list parts for 70s bikes!
10 May 2015 10:18 #38

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Replied by Bigdog302 on topic Re:Yet another DT400 project,the Super DT400.

thanks! you would be surprised on what is still available. there is things I stumbled on and was very surprised. it makes it a lot easier for us to fix up our old bikes. :OnFire

Boyesen still lists reed valves on two strokes going all the way back to 1919! :EEEK
2 1968 DT1s,1970 RT1M,1970 DT1C,1971 RT1B,1971 Honda Z50K2,1974 DT100A 1974DT250A,1974 Honda MT250,2 1975 DT400Bs,1975 Honda CR250M1,1978 DT175E,1979 Honda CR250R.
Dave
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Last edit: 10 May 2015 10:23 by Bigdog302.
10 May 2015 10:22 #39

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Replied by MarkT on topic Re:Yet another DT400 project,the Super DT400.

From the Boyesen website...





(you have to scroll down to get to the DT400 listing...)
1963 YG1-T, 1965 MG1-T, Allstate 250, 1970 CT1b, 1971 R5, 1973 AT3MX, 1974 TS400L, 1975 RD350, 1976 DT175C, 1976 Husqvarna 250CR, 1981 DT175G, 1988 DT50, 1990 "Super" DT50, 1991 RT180, 2017 XT250
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10 May 2015 10:35 #40

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