1980 xs650special
XS650 Member
- Messages
- 20
- Reaction score
- 0
- Points
- 1
Hey all,
It has been a long while since I have posted here, but the long winter months have gotten me thinking again.
I have a 1980 XS650 Special, and I have been chasing very intermittent issues with it over the past few years. Up until this point I have always thought it to be fuel related issues but in dealing with some ignition issues on a different engine it got me wondering if some of these symptoms would carry over to my problems with the XS.
I apologize if I have a lack of detail and I will do my best but I haven't ridden it in a few months things are a little foggy.
First off, the setup is mostly stock with new air filters, carb boots, manual petcock, slide diaphragms, up-sized pilot and main, and other things that I may be forgetting...all this work was done when I was chasing fuel issues.
As for the symptoms, It runs pretty good and I have been happy with performance through most of the range. EXCEPT: it has almost always had a little stumble right off of idle if I snap the throttle fast. And here is where the problems really take an annoying turn. Randomly...and I mean randomly(once was a year and a half between incidents)I can be riding along at any point into a ride, could be 1 mile or 50...and it will start to buck and miss and surge in and out and nothing that I do can prevent the inevitable stall that happens next. If I mess with choke/no choke I can sometimes get it running again...but rough...and as soon as I take it off choke it dies...I end up fighting with it for quite some time until I can either limp it home or leave it and come back later. Then it usually fires up like nothing happened and runs great again.
Also, the last time this happened I noticed as I was limping it home that it seemed like it was running on one cylinder and the other one would cut in and out sometimes.
The PO installed what looks to be one of those green dual output coils from Mikesxs. Could this be a coil on its way out? If so why would it respond to choke after it dies? Also, why would it start and run fine after sitting for a few hours?
Any thoughts would be great, i'm just sitting here thinking about things until the weather gets above 30 degrees again
Thanks!
It has been a long while since I have posted here, but the long winter months have gotten me thinking again.
I have a 1980 XS650 Special, and I have been chasing very intermittent issues with it over the past few years. Up until this point I have always thought it to be fuel related issues but in dealing with some ignition issues on a different engine it got me wondering if some of these symptoms would carry over to my problems with the XS.
I apologize if I have a lack of detail and I will do my best but I haven't ridden it in a few months things are a little foggy.
First off, the setup is mostly stock with new air filters, carb boots, manual petcock, slide diaphragms, up-sized pilot and main, and other things that I may be forgetting...all this work was done when I was chasing fuel issues.
As for the symptoms, It runs pretty good and I have been happy with performance through most of the range. EXCEPT: it has almost always had a little stumble right off of idle if I snap the throttle fast. And here is where the problems really take an annoying turn. Randomly...and I mean randomly(once was a year and a half between incidents)I can be riding along at any point into a ride, could be 1 mile or 50...and it will start to buck and miss and surge in and out and nothing that I do can prevent the inevitable stall that happens next. If I mess with choke/no choke I can sometimes get it running again...but rough...and as soon as I take it off choke it dies...I end up fighting with it for quite some time until I can either limp it home or leave it and come back later. Then it usually fires up like nothing happened and runs great again.
Also, the last time this happened I noticed as I was limping it home that it seemed like it was running on one cylinder and the other one would cut in and out sometimes.
The PO installed what looks to be one of those green dual output coils from Mikesxs. Could this be a coil on its way out? If so why would it respond to choke after it dies? Also, why would it start and run fine after sitting for a few hours?
Any thoughts would be great, i'm just sitting here thinking about things until the weather gets above 30 degrees again
Thanks!