Jump to content

XS250 still wont start


YDS7Paul
This post is 3358 days old and we'd rather you create a new post instead of adding to this one. You can't reply in this post.

Recommended Posts

Hi all I am still having trouble with my 1977 XS250 starting. The bike is a standard 250 with matching engine and frame numbers but has 400 barrels and head, the carbs are standard 250.  First of all I was convinced it was the carbs but after exhaustive work on them and speaking to other people I am now not so sure. My last efforts were to remove the starter motor and have it checked, that was ok. Then someone who used to own one and had done the same 400 top end swap suggested changing the condenser(s). I done this Saturday and still no joy. Any theories would be welcome as I am running out of ideas. 

Link to comment
Share on other sites

Do you want an ad-free experience? Join today and help support the Yamaha Owners Club.

Hi yes I have a spark at the plugs and the bike will eventually run. It just takes so long to start, so long that you would drain the battery before it started. Once running it is not too bad but even when warm if you turn it off it is very difficult to restart.

Link to comment
Share on other sites

DO a compression test ,   3 things needed to start. Spark/fuel [ you have both]  and GOOD  compression,, ;)

Link to comment
Share on other sites

is it gapped right,  plugs and points. clean air filter, make sure you have good fuel feed too.

Edited by up.yours
Link to comment
Share on other sites

  • Moderator

Look on the bright side, its better than a Z250.........um!

Link to comment
Share on other sites

  • Who's Online (See full list)

    • There are no registered users currently online
  • Recently Browsing

    • No registered users viewing this page.
×
×
  • Create New...