New Guy w/ '71 Yamaha DT1 - Off-Road Forums & Discussion Groups
Vintage Dirtbikes Discussion of all things on Vintage Dirtbikes manufactured in 1980 or earlier.

 
LinkBack Thread Tools Display Modes
post #1 of (permalink) Old 12-01-2008, 11:13 AM Thread Starter
 
Join Date: Nov 2008
Posts: 1
Thanks: 0
Thanked 0 Times in 0 Posts
 
New Guy w/ '71 Yamaha DT1

Hey All,

New owner here of a 1971 Yamaha DT1 250 looking for all the help, guidance and advice for the restore that I can get for my new bike. The bike is currently not running, but has good compression, and a clean gas tank. First thing is a good cleaning...
Attached Images
File Type: jpg bikes3.jpg (67.1 KB, 2 views)
Hamr Mark is offline  
Sponsored Links
Advertisement
 
post #2 of (permalink) Old 12-01-2008, 09:55 PM
pgiganti
Guest
 
Posts: n/a
Things to try

I've been through this a few times! Here's what I would try in order of easiest to hardest. First check for a spark using a new plug, connected, but grounded outside the engine. If no spark, then it could be the coil, plug cap, hi tension wire, points, condenser, wiring, or stator coil, in other words, a lot of stuff to check. It could be just the timing is WAY off, but ironically, most two strokes will fire or backfire if the electrical system is fair but the timing is way off. You can't inspect the condenser to see if it's OK, and it's not easy to tell if the points are ok by looking. Best to just replace both points and condenser with new parts, then carefully set the timing by the book.

If you've got a nice spark and it's not running, move on to the carb. After kicking it a BUNCH, pull the plug and see if it's wet. It should be wet, and smell like gas. If it's dry, take the carb off and take it all apart carefully. You can do a careful cleaning of all the deposits and the misc jet, but sometimes it's just faster and more sure to buy a rebuild kit for the carb.

Nine times out of ten, it's either the ignition system or the carb. If those check out, things get more complicated...
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Off-Road Forums & Discussion Groups forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in










Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Posting Rules  
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome