surging when using partial throttle in windy conditions.
Posted: Wed Nov 28, 2012 5:08 pm
I would only do a jet mod as a last resort. Everyone that's done one has reported a significant decease in mpg with marginal performance gains. Some I attribute to the dreaded placebo effect. Do the T/Y vent mod and turn out your pilot screw. Has anyone mentioned checking the float level ? Then if necessary shim the needle a bit instead of the major surgery of changing jets.
Bogdan, who only recommends the major surgery of flossing your teeth
From: David Nichols >
Reply-To: David Nichols >
Date: Wednesday, November 28, 2012 11:37 AM
To: Ken >
Cc: RobertWichert >, Bill Kinnison >, KLR Group DSN_KLR650@yahoogroups.comDSN_KLR650@yahoogroups.com>>
Subject: Re: [DSN_KLR650] Surging when using partial throttle in windy conditions.
Thanks Ken, can you tell me what number jet you're using? Any other mods?
________________________________
From: Ken >
To: Bill Kinnison >; David Nichols >
Cc: RobertWichert >; KLR Group DSN_KLR650@yahoogroups.com>
Sent: Tuesday, November 27, 2012 6:42 PM
Subject: Re: [DSN_KLR650] Surging when using partial throttle in windy conditions.
I have an 09 with the 688 upgrade with klx needle and rejetted. No problems.
KJE Bill Kinnison > wrote:Mine does this to a small degree too. I'm sure these being carbed engines,
and varying ages, altitudes, loads, & other varying conditions, they are
all a little different. But it seems like a fuel issue to me. I have seen a
lot of guys say that the 22 cent mod or the KLX needle mod are necessities
on this bike. I imagine they would really clean this up.
-
Bill
On Mon, Nov 26, 2012 at 12:44 PM, David Nichols > wrote:
[Non-text portions of this message have been removed] ------------------------------------ List Sponsors - Dual Sport News: http://www.dualsportnews.com Arrowhead Motorsports: http://www.arrowheadmotorsports.com List FAQ courtesy of Chris Krok: http://www.bigcee.com/klr650faq.html Member Map: http://groups.yahoo.com/group/DSN_KLR650/app/peoplemap/view/map Group Apps: http://groups.yahoo.com/group/DSN_KLR650/grouplets/subscriptionsYahoo! Groups Links [Non-text portions of this message have been removed] [Non-text portions of this message have been removed] [Non-text portions of this message have been removed]> ** > > > Maybe I should have said this before, but the engine cuts out like it's > running out of gas. More throttle always makes it run but it is pretty > abrupt. In a corner it's downright dangerous... > > One more thing, I removed the snorkle. > > ________________________________ > From: RobertWichert > > To: David Nichols > > Cc: KLR Group DSN_KLR650@yahoogroups.com> > Sent: Monday, November 26, 2012 2:25 PM > Subject: Re: [DSN_KLR650] Surging when using partial throttle in windy > conditions. > > > > Mine seems like it surges in the wind too. I have decided that it is > the wind. > > Seriously. > > Robert Wichert P.Eng. LEED AP BD&C > +1 916 966 9060 > FAX +1 916 966 9068 > > =============================================== > > On 11/26/2012 11:00 AM, David Nichols wrote: > > > > My 1997 KLR650 surges when using partial throttle in windy conditions. > > This happens while I am riding at about 3,750 RPM - about 55 MPH. I've > > been trying to figure out what's going on for awhile and I'm still > > stumped. It may be my imagination, but this issue seems worse on a > > windy day. I trimmed the carb vent line last night, before I trimmed > > it it was hanging down below the swing arm about 4 inches. Could that > > have caused it? I cannot tell yet because I haven't been able to ride > > much since trimming the vent. I haven't done the T mod...yet. > > > > Here's the details on my KLR: > > 17,000 miles, I'm the second owner. > > 22 cent mod, drilled the slide, shimmed the main needle, set the air > > screw to 1.75 turns (should it be further out?). > > Carb has been cleaned recently and has new parts in it everywhere they > > can be replaced (except for slide and diaphragm, which are in good > shape). > > Vacuum petcock, recently overhauled. > > Sintered brass type fuel filter, the same one Fred sells which is high > > flow. > > OEM oiled air filter with Notoil oil, recently cleaned and not over > oiled. > > IMS tank, with a vent hose that's not clogged or kinked. > > New Eagle Mike/Wyman Winn 688 piston, rings, and valve job 400 miles ago. > > New chain and sprockets. > > Eagle Mike doohickey and torsion spring. > > Valve clearances set to max clearance 400 miles ago. > > OEM exhaust, fresh gaskets with no leakage. > > > > Some more details: it doesn't pop a lot under deceleration but does > > have a slight popping. When I start it on a cold day the enrichener > > doesn't work. I can always start it by twisting the throttle until it > > fires and I need to keep a little throttle for about 30 seconds until > > it idles on it's own. If I use the enrichener, it just won't start and > > I'm afraid I'll flood it. I recently replaced the enrichener plunger > > with a new OEM one, the one I replaced had a gouge on the outside > > diameter of the larger part of it. Looked like someone had grabbed it > > with pliers. > > > > -David > > > > [Non-text portions of this message have been removed] > > > > > > [Non-text portions of this message have been removed] > > [Non-text portions of this message have been removed] > > >