help, engine "surging"

[Weaver, Mark]

sorry robb, that's a classic symptom of lean carburetion. it even has a name, "lean surge". you might try using duct tape to progressively cover part of you airbox intake. that will probably richen the mixture somewhat. if that makes the surge go away, then you might have to get friendly with your carburetor. also possible that that fuel line isn't flowing well for some reason. you could try a new line w/o filter. make sure the filter is facing the right way and gas line isn't kinked awkwardly anywhere. -mark weaver p.s. am i the only guy who got a fuel filter as OEM on his klr?

> -----Original Message----- > From: Robb Seurkamp [mailto:zircam@...] > Sent: Tuesday, September 19, 2000 2:30 PM > To: DSN_klr650@egroups.com > Subject: [DSN_klr650] Help, Engine "surging" > > > Hey everyone, nice to have the digest back. > > Hope someone can offer some suggestions to my latest problems with my > 650. I am noticing some surging while I am travelling at a consistent > speed on the highway. I can feel it in the bars almost like a gust of > a head wind gets your attention. > I am trying to determine if this might be fuel or ignition related. > > I want to get advice on methods of trouble shooting before I go > panicing. It has been doing this for about 3 weeks or so since I have > noticed it. > > What I have done. > -About 2 weeks ago I did a valve adjustment changing all four shims. > (very careful to double check my reassembly) > -A month or so ago I installed an inline fuel filter. I did a fair > amount of riding right after that and the surging wasn't happening. > -I have been to different gas stations during that time. > -Bike has 2200 miles on it, Y2K model. > I run high octane in it. > > Symptoms- > -I can let off the throttle and then grab a handful while cruising on > the highway and it won't stutter at all. > -It idles smoothly, as smooth as a KLR can. > -I can run it hard up through the gears and not notice and hesitation. > -While it is "missing" I try to get a peek at the tach at around 60 > mph, I don't notice any obvious jumping of the tach needle. > > What I was thinking of doing. > -Dry gas (isopropyl) Is this okay to add a little to the tank? Maybe > it is ONLY water in the tank. > -Run the gas out of the tank and check that the screen isn't blocked. > Is there a screen in the petcock? > -Put a new piece of fuel line in without an inline filter. Maybe it > is some kind of fuel deprivation prob. > > Gentlemen (and ladies, I know there are a few on the list) Your > suggestions please. > > Please don't tell me it is an internal carb problem. Carburetors and > me don't get along. (even with a good tutorial) > > Thanks, Robb > > Off list replies are fine too. > > > Visit the KLR650 archives at > http://www.listquest.com/lq/search.html?ln=klr650 > Support Dual Sport News... dsneditor@... > Let's keep this list SPAM free! > > Visit our site at http://www.egroups.com/group/DSN_klr650 > To unsubscribe from this group, send an email to: > DSN_klr650-unsubscribe@egroups.com > >