75 Yamaha DT400 build

motorman45 · May 24, 2015

So I found this 75 Yamaha DT400B basket case to build into a tracker of sorts, well it kind of already is but its evolved a few ways as ive gone thru the motions of building it. so I thought id put the stages so far, I built and posted a Honda shadow brat here last year and wanted to do something lighter and a bit more simple.

Anmic · May 24, 2015

Looks good! Im watching.

2_DONE_THE_TON · May 25, 2015

I will stick around!

motorman45 · Jun 2, 2015

while im waiting for the motor parts I need and a re bore I started on the sheet metal for the tail and seat.

irk miller · Jun 2, 2015

Nothing like a dual sport. 8)

canyoncarver · Jun 3, 2015

Onboard.

motorman45 · Jun 5, 2015

Got to some more seat fabrication. stiill not sure about the front fender but ill try some different looks when i get the motor in.

motorman45 · Jun 8, 2015

more progress, firmed up the tail with 1/4 " rod , more tig welding but ran out of argon. finished matching the ports on the jug prior to a over bore, testing clear clor paint over silver metallic, looks pretty nice so far, this will be the color of the tank and tail

cosworth · Jun 9, 2015

Dt175 owner here. Looking forward to some pics of progress.

JustinLonghorn · Jun 9, 2015

I'm on board.

motorman45 · Jun 22, 2015

more done. motor complete, 1mm over weisco, all new seals matched porting, playing more with paint and finished seat fab and just primed it. . need rear sets now

motorman45 · Jun 22, 2015

been playing with paint in a s[ray can, this is clear blue over silver metallic base. not bad so far

canyoncarver · Jun 23, 2015

Love that color.

VonYinzer · Jun 23, 2015

Good stuff.

2_DONE_THE_TON · Jun 23, 2015

Hell yeah.

motorman45 · Jun 24, 2015

Thanks guys. nice to know other like what ive bee making so far. I like the color too so far, here is the tail and seat pan with color,

motorman45 · Jun 30, 2015

now im working on the wiring, after reading all sorts of threads on 6 volt to 12 volt conversion i designed a new wiring layout. the 12v headlight is wired direct to the AC for best power and the LED tail lights and blinkers are DC from a small Cap/nicad bank charges thru a regulator rectifier.

jimmer · Jun 30, 2015

That is looking sharp,can't wait to see the end result. 8)

motorman45 · Jul 10, 2015

more progress with the hydroform expansion chamber

JadusMotorcycleParts · Jul 10, 2015

Damn this is so freakn awesome. Cant wait to see how it turns out. The fab skills on the tail section and the expansion chamber are real impressive. Did you consider doing a full 12V conversion? I hope you don't have any issues but if you do, I can highly recommend the kit from powerdynamo in Germany.

Also, what will you do for carb? I ran a 34mm (up from the 32mm) Mikuni VM carb. Went pretty good with some Boysen performance reeds in it too - i rekon the stock stainless ones are too stiff.

Will you run the original oil pump or convert to premix?

75 Yamaha DT400 build

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