1978 or 1977 dt400 questions
Posted 19 November 2010 - 09:47 AM
How can I verify the model year?
Does it hurt anything to disconnect the oil injection and just run pre-mix?
Posted 19 November 2010 - 01:29 PM
Posted 19 November 2010 - 02:40 PM
The 78's VIN's ran from: 1M2-100101 to 112053
DT400's have had oil injection since their debut in 1975.
Yamaha's 1st DT, the DT250, has had oil injection since 1968.
The stock oil injection is VERY reliable. If you determine it's working OK I'd keep it as it's a really great feature and it gives you precisely the right oil mixture for any given throttle opening.
Best source of info for you: http://www.yamahaenduro.com
Posted 19 November 2010 - 05:44 PM
It has been a few years since I had a DT400, but I remember 10-12 tanks of fuel per tank of oil. It was really nice to pull up to a station and just fill it up.
Posted 20 November 2010 - 07:15 AM
Posted 20 November 2010 - 04:06 PM
Make sure to post some pictures!
Posted 20 November 2010 - 06:59 PM
THe guy claimed it ran good last year and he started tearing things off to make it more "dirt bike" in looks. Hoping to powerwash all the grime off tomarrow if I find the time.
I am going to have to figure out how to post pics. Kind of sad, Ihave been on TT for several years and still dont know how to post pics.
Posted 30 November 2010 - 08:10 AM
Missing some of the turn signals and the headlight. The throttle cable system is missing the upper portion, the lower split cables section is in pretty poor shape. Checked for spark and had it.
Figuring for the time being I am going to block off the oil pump and use a solo throttle cable from one of my primary bikes just to get it running for better evaluation before buying the expensive oem cable system (hard to find and pricey).
To get going on this project I am going to have to find a shifter (might try to temporarily use one off my cr250 or ktm 200), install new fork seals, adapt a solo throttle cable, new air filter. Anybody have any suggestions on what oil mixture I should run on this (what approx mix ratio the oil pump would produce)?