1975 Yamaha dt400c

kelvinb · 08-16-2012, 09:54 AM

Hi, my name is Kelvin, friends with regal403 on here and pointed me to this site. I recently acquired this bike as a project. My uncle purchased this from the original owner, and has had this since the mid 80s.

He parked it in this barn after it quit getting spark 5 years ago. I asked him how much he wanted for it and told me that if I picked it up, I could have it.

quick trip to the car wash

I finally tore into it, and started determining what i could use, and what i had to replace.

seat latch works

custom oil cap, a cheap ebay replacement has been acquired.

the fuel tank had something in it, and i wasnt about to try and figure out if it would fire on it or not so i decided to drain it. after removing the fuel line i tried turning the petcock from off to on, and it wouldnt turn. a pair of pliers finally coaxed it open but nothing would come out.

after cleaning off the sludge i could blow through it. whether or not it works ill find out later i guess.

I then decided to take the airbox and carb off to see what it looked like. the tube between the carb and airbox revealed a critter that passed many moons ago. fortunately the carb was stuck closed, so there was nothing in it, or the cylinder.

well, theres only one place it could of came from right?

I am now searching for a new airbox, and recently acquired a new wiring harness as this one is destroyed.

it is currently sitting like so waiting for some brake cleaner, degreaser and a quick wash.

if anyone has any parts for sale, or any information they would like to share i would appreciate it. Ive been lurking and viewing some other restorations of these and really impressed on how well they turn out. Thanks

kelvinb · 08-17-2012, 05:15 AM

this came with it too.

nhedbot · 08-17-2012, 05:37 AM

You may already know about yamahaenduro.com. If not, check it out. Lot of knowledge and help there.

20valves · 08-17-2012, 09:59 AM

Wait a minute, an off road capable bike that's street legal, I thought BMW started all that in the 80's?

Have fun, a guy in OK restored one of those to showroom and it's a great bike!

baloneyskin daddy · 08-17-2012, 11:26 AM

They were great bikes, I have the exact bike sitting and rotting away up at a hunting camp, Every few yrs I dig it out and fire it up and run it around the trails just for the hell of it.

regal403 · 08-17-2012, 06:48 PM

Oh hello Kelvin. Nice project.

Hunsta · 08-17-2012, 07:40 PM

If you have trouble finding an air box, I have one thats off my 1976 DT250. Should be virtually the same Im sure. However I am in Australia.
Craig

Shocktower · 08-19-2012, 11:02 AM

Good times, great bike. try speed and sport inc, they have tons of parts

www.speedandsportinc.com will fill you needs also www.yamaha-motor.com can order stuff to your favorite dealer

exoff-roadgoat · 08-30-2012, 08:06 PM

Nice find! I had a 74 which was the same bike with a different paint job. I replace the seat with one from the same year MXer. You can see the two mounting brackets on your frame for the MX seat. Much betta on the bottom.

georgej · 09-02-2012, 05:14 AM

Nice bike. I just picked up a '74,no title but she runs and is complete,even has the tool kit under the seat. The kick starter on mine gets stuck sometimes.i'll be doing some work to it over the winter,tires,general cleanup etc.I'll post a pic soon.Good luck with yours.

08-16-2012, 09:54 AM	#1
kelvinb ^OP n00b Joined: May 2012 Oddometer: 3	1975 Yamaha dt400c Hi, my name is Kelvin, friends with regal403 on here and pointed me to this site. I recently acquired this bike as a project. My uncle purchased this from the original owner, and has had this since the mid 80s. He parked it in this barn after it quit getting spark 5 years ago. I asked him how much he wanted for it and told me that if I picked it up, I could have it. quick trip to the car wash I finally tore into it, and started determining what i could use, and what i had to replace. seat latch works custom oil cap, a cheap ebay replacement has been acquired. the fuel tank had something in it, and i wasnt about to try and figure out if it would fire on it or not so i decided to drain it. after removing the fuel line i tried turning the petcock from off to on, and it wouldnt turn. a pair of pliers finally coaxed it open but nothing would come out. after cleaning off the sludge i could blow through it. whether or not it works ill find out later i guess. I then decided to take the airbox and carb off to see what it looked like. the tube between the carb and airbox revealed a critter that passed many moons ago. fortunately the carb was stuck closed, so there was nothing in it, or the cylinder. well, theres only one place it could of came from right? I am now searching for a new airbox, and recently acquired a new wiring harness as this one is destroyed. it is currently sitting like so waiting for some brake cleaner, degreaser and a quick wash. if anyone has any parts for sale, or any information they would like to share i would appreciate it. Ive been lurking and viewing some other restorations of these and really impressed on how well they turn out. Thanks

08-17-2012, 09:59 AM	#4
20valves Yamaholic Joined: Sep 2010 Location: Oklahoma Oddometer: 326	Wait a minute, an off road capable bike that's street legal, I thought BMW started all that in the 80's? Have fun, a guy in OK restored one of those to showroom and it's a great bike! __________________ '06 R1 LE, '13 FJR, '12 XTZ12, '09 T Max

08-17-2012, 07:40 PM	#7
Hunsta Have guns will hunt Joined: Jan 2006 Location: Gympie Queensland Australia Oddometer: 5,406	If you have trouble finding an air box, I have one thats off my 1976 DT250. Should be virtually the same Im sure. However I am in Australia. Craig __________________ I REALLY AM A NICE GUY. JUST ASK ANYONE WHO HASN`T MET ME.

08-19-2012, 11:02 AM	#8
Shocktower Beastly Adventurer Joined: Jul 2009 Location: Oregon City Orygun Oddometer: 8,314	Good times, great bike. try speed and sport inc, they have tons of parts www.speedandsportinc.com will fill you needs also www.yamaha-motor.com can order stuff to your favorite dealer __________________ Alexa Drew Nov 9 1995- Oct 28th 2004 Miss you baby '08 KTM 530 EXC 79 RD 400 Daytona

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08-17-2012, 05:15 AM	#2
kelvinb ^OP n00b Joined: May 2012 Oddometer: 3	this came with it too.

08-17-2012, 05:37 AM	#3
nhedbot n00b Joined: Oct 2010 Oddometer: 6	You may already know about yamahaenduro.com. If not, check it out. Lot of knowledge and help there.

08-17-2012, 11:26 AM	#5
baloneyskin daddy bikaholic Joined: Oct 2009 Location: southcentral PA. Oddometer: 1,540	They were great bikes, I have the exact bike sitting and rotting away up at a hunting camp, Every few yrs I dig it out and fire it up and run it around the trails just for the hell of it.

08-17-2012, 06:48 PM	#6
regal403 vanilla_g0rilla Joined: Apr 2008 Location: Lincoln, NE Oddometer: 485	Oh hello Kelvin. Nice project.

08-30-2012, 08:06 PM	#9
exoff-roadgoat Will ride for food Joined: Nov 2008 Location: W.Meechigan Oddometer: 3,341	Nice find! I had a 74 which was the same bike with a different paint job. I replace the seat with one from the same year MXer. You can see the two mounting brackets on your frame for the MX seat. Much betta on the bottom.

09-02-2012, 05:14 AM	#10
georgej Gnarly Adventurer Joined: Nov 2008 Location: Upstate,N.Y. Oddometer: 157	Nice bike. I just picked up a '74,no title but she runs and is complete,even has the tool kit under the seat. The kick starter on mine gets stuck sometimes.i'll be doing some work to it over the winter,tires,general cleanup etc.I'll post a pic soon.Good luck with yours.