yamaha 78 xs750 issues


Old 07-06-06, 01:56 PM
Thread Starter
Join Date: Jul 2006
Location: USA
Posts: 22
yamaha 78 xs750 issues


I have a 78 XS750SE that seems to be stalling out constantly now. It ran great, the only mod I had made was that I changed the petcocks, got rid of the pesky vaccuum ran ones, but it ran fine after that.

When idoling, it will not stay, if I pull the choke 1/2 out, it will stay running, but if I let it in, it dies. This started on a ride, it wouldnt stay running at low idol, it just dies.
Any ideas on what to look at?
Sponsored Links
Old 07-07-06, 06:31 AM
the_tow_guy's Avatar
Group Moderator
Join Date: Feb 2001
Location: SW Fla USA
Posts: 11,588
Vacuum leak; getting too much air.
Old 07-07-06, 09:40 AM
Join Date: Jan 2006
Posts: 107
Hi, Sounds like a common problem. The right amout air and not enough fuel or the right amout of fuel and too much air. Could be a number of problems. Fuel being restricted, low speed air passage blocked or a vacuum leak.
I would bet it is a fuel restriction problem but check for a vacuum leak also.
Best regards, Jeff Z.

Last edited by Jeff Z; 07-07-06 at 11:17 AM.

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 Off
Pingbacks are Off
Refbacks are Off

Thread Tools
Search this Thread
Display Modes