tag:blogger.com,1999:blog-2509610466526370087.post5815938928156268796..comments2023-08-10T06:48:37.549-07:00Comments on GnarlyWrench: Still no progress - GL1000gnarlycharlie4uhttp://www.blogger.com/profile/06601479090778920946noreply@blogger.comBlogger4125tag:blogger.com,1999:blog-2509610466526370087.post-38791407732931696922011-12-02T07:46:12.334-08:002011-12-02T07:46:12.334-08:00I've confirmed that the problem is not the air...I've confirmed that the problem is not the air cut off valve several times, and the o-rings are in place.<br /><br />I've got a set of vacuum gauges that you can see here:<br />http://gnarlywrench.blogspot.com/2011/10/two-steps-forward-two-steps-back.html<br /><br />I've also got a mercury manometer that is not pictured.<br /><br />Thanks for your comment!gnarlycharlie4uhttps://www.blogger.com/profile/06601479090778920946noreply@blogger.comtag:blogger.com,1999:blog-2509610466526370087.post-74743308945403530592011-11-29T15:44:42.764-08:002011-11-29T15:44:42.764-08:00There is a valve on the top of the 'Air Box...There is a valve on the top of the 'Air Box' (plenum) they call the 'air cutoff valve', it's the same thing the automobile makers used to call a 'deceleration delay valve' - anyway, it's mounted just below the breather and to the front, and has a vacuum hose going to the #1 carb. You might try disconnecting the hose and plug it and see what happens- also apply vaccum from another source if you have a 'Mighty-Vac' or something. <br /><br />This valve also must be removed to R&R the carb set and the o-rings there might have been left out on re-assembly.<br /><br />I have run into this and all manner of other uneven idle conditions on these- just do your self a favor and get hold of the vacuum guage setup for synchronizing your carbs before you go much further with anything- it's incredibly crucial and you'll be glad you did!1Grouch2uhttps://www.blogger.com/profile/08537645791903753275noreply@blogger.comtag:blogger.com,1999:blog-2509610466526370087.post-58277836253137004882011-10-28T15:26:29.952-07:002011-10-28T15:26:29.952-07:00Compression is good. No leaks at the air box.
I h...Compression is good. No leaks at the air box.<br /><br />I have since found and solved 2 air leaks. But every time I find one, a new one pops up and symptoms return, just exhibited slightly differently.<br /><br />Now I'm trying to determine if the #3 carb has an air leak at the manifold boot or the throttle plate dowel.gnarlycharlie4uhttps://www.blogger.com/profile/06601479090778920946noreply@blogger.comtag:blogger.com,1999:blog-2509610466526370087.post-40059280004185764472011-10-28T11:17:14.848-07:002011-10-28T11:17:14.848-07:00I know you have been through all this, but that su...I know you have been through all this, but that surging idle screams air-leak. Does that bike have a vacuum operated petcock? Just trying to think of weird air sources.<br /><br />Where is the airbox/filter on that bike? Maybe some weather stripping to seal it up would help.<br /><br />Another possibilty, though remote, is that the throttle cable is snagging on something. You didn't touch the throttle or turn the bars though, so probably not.<br /><br />Where does the choke lever/knob sit on the bike? Maybe something it triggering the choke to cause it to surge.<br /><br />Is compression even across the cylinders?Tamir Lenkhttps://www.blogger.com/profile/13525325113803746665noreply@blogger.com