valve shim question

[Gary LaRue]

Did you change to a foam air filter? When I changed from an enclosed air filter to two pod-type uni foam filters on my old 500 CC Honda, it surprised me how much more intake noise I could hear. Kind of a stacato "Blaaaaaat!" sound under acceleration. (Don't ya just looove the flash backs to old comic book sound effects!) Lash ----- Original Message ---- From: Vick Mackey To: DSN_KLR650@yahoogroups.com Sent: Friday, June 20, 2008 9:19:32 AM Subject: Re: [DSN_KLR650] strange noise coming from engine, need help This is a different noise. I am talking about a solid engine noise that only happens under hard acceleration. Kind of like a chopping noise, it doesn't sound good. I have an upgraded doo. It is not that something is loose, it is similar to the noise an engine makes when lugging, but higher pitched. Any other suggestions? ??? Recent Activity * 17 New Members * 16 New PhotosVisit Your Group Health Zone Look your best! Groups to help you look & feel great. Yahoo! News Kevin Sites Get coverage of world crises. Real Food Group Share recipes and favorite meals w/ Real Food lovers. . [Non-text portions of this message have been removed]

[Wayne Blackburn]

I had the same sound on mine after picking it up the dealership. also had the rear tire hitting the swingerarm due to overtighten chain. sounds like it is possible drive train issue.

--- On Fri, 6/20/08, Hedrek wrote: From: Hedrek Subject: Re: [DSN_KLR650] strange noise coming from engine, need help To: DSN_KLR650@yahoogroups.com, "Vick Mackey" , "Bogdan Swider" Date: Friday, June 20, 2008, 1:57 PM I did do a quick balancer chain adjust in Ruidoso, but it didn't help. I'm stumped by the fact that it only happens under load, not when in neutral.. I hope to peek inside tomorrow or Sunday. Robert Hedrick Albuquerque, NM --- On Fri, 6/20/08, Bogdan Swider wrote: From: Bogdan Swider Subject: Re: [DSN_KLR650] strange noise coming from engine, need help To: hedrek@yahoo. com, DSN_KLR650@yahoogro ups.com, "Vick Mackey" Date: Friday, June 20, 2008, 8:02 AM During the Moab rally, at the campground, a klr rode in and making that same metallic noise the posts below complain about. ( This was years ago; anybody remember Mariola s friend Adam ? ) Anyway..some of us advised a simple balancer chain adjustment; we performed the procedure and the noise was gone. Obviously this will only work if the doo and spring are sound but hey...they might be. Do that first. Bogdan On 6/19/08 4:02 PM, "Hedrek" wrote: > > > > I have something similar going on. I hear a loud, intermittent crashing or > rattling sound. I can rev the engine in neutral and it sounds fine, but get > in gear and I'll get this metallic sound (not just under hard acceleration for > me). I first thought it was just valve train or combustion noise, but I am > going to look inside and see if there's anything flying around. I have about > 45,000 on my 2007. I haven't done the doo and am afraid I have a broken part > and a loose chain inside. I was headed south weekend before last, about 2 > hours from home, when it became obvious (I had heard it before but was not > running due to a brake part I was waiting for, so I had forgotten the noise). > I almost turned around and came home, but just put in some earplugs and played > like it wasn't there. Trip was fine. > > I'll be riding the Concours until I look inside and see what's going on. > Might as well order the Doo parts and do that while it's opened up. I'll post > and let everyone know what I find. > > Robert Hedrick > Albuquerque, NM > > --- On Tue, 6/17/08, Vick Mackey > wrote: > > From: Vick Mackey > > Subject: [DSN_KLR650] strange noise coming from engine, need help > To: DSN_KLR650@yahoogro ups.com > Date: Tuesday, June 17, 2008, 11:19 PM > > I have a possible problem with my 2007 KLR 650. When I accelerate hard it > sounds like the engine is running harsh. Almost like it is lugging, but > higher pitched, I guess is the best way to describe this problem. > The bike has 23,000 miles on it, and has been doing this for the past > 4,000-5,000 miles. > This sound only happens during hard acceleration. > Is this normal? I know the bike did not make this sound earlier in its > life. > Back around 18,000 miles I had a carburetor problem and had to drain the > carb. When I went to start the bike, it took awhile to start because of the > lack of fuel. I had a passerby helping me, and he opened the throttle when > pushing the start button and starting the bike and accidentally revved my > engine up to 10,000 rpms while in neutral. > This is around the time that I noticed this noise on hard acceleration, but > it might have been happening earlier and I just hadn't noticed before. > So my questions are: > > 1. Is this engine sound normal on hard acceleration for a bike with > 18,000-23,000 miles? > 2. Could this be the sign of a bent valve? > 3. How likely is it that the 10,000 rpm incident bent my valves, or caused > other damage? > > I am traveling in Mexico and don't have access to mechanics. I CANNOT get a > leakdown or compression test! > > Please advise if you can. Thank you. > > Vick > [Non-text portions of this message have been removed] [Non-text portions of this message have been removed]

[Rick]

I have just finished checking and adjusting the valves on my wife's 05 and my 06. Last time I checked and adjusted them was about 12,000 miles ago, before our last trip to Mexico/Central America. On my bike, I found both exhaust valves were tight. On my wife's bike, and I will assume operator error from the previous adjust, one of her intake's was reading at .010 and loose spec is .008. So I actually had to put a fatter shim in to get it into spec. Interestingly enough, she says the bike starts and runs better than it has for the last year and a half. I bought a set of shims from Fred at Arrowhead because I found both bikes to require different sets of shims depending on which valve needs adjustment. And I keep the set full because with two bikes I never know which shim will be required.

--- In DSN_KLR650@yahoogroups.com, "Bryan Burke" wrote: > > Hopefully the KLR gurus out there can help me out on a valve > clearance question. I was planning to take off on a 10 day ride next > Tuesday and was going through the usual maintenance. Looking at my > log, I realized I was due for a valve clearance check, and last time > I did that my valves were getting near the limit. > > Well, they are way out of limit now, so I'll end up driving rather > than riding. But here's my question: does the KLR start out with a > stock set of shims, or does the factory drop 'em into each motor > depending on how the thing fits together during assembly? I'm asking > because I'll have to order shims, and I'd like to do it before I take > off, but I don't want to pull the whole top end apart and leave it > for two weeks. (Today I put the head back on loosely and closed up > the engine to keep the dust out.) The KLR is in an aircraft > maintenance hangar and might need to be moved while I'm away, so > tearing it all up to pull out the existing shims doesn't make sense, > until I get back. If I can order now, it will save me a few days. > > If the bikes do come with a stock valve shims, here are my current > specs: > Rt. Intake, .05. Was .12 4,800 miles ago. > L Intake, .04. Was .10 4,800 miles ago. > Rt. Exhaust, .08. Was .20 " " > L Exhaust, .05. Was .15 4,500 " " > > Obviously I need to get some thinner shims, so is there a way to > figure out what size without pulling the whole cam/lifter section > apart? > > Also, is it usual for the clearance to drop that fast? I did the last > check at 11,900 miles, and now I'm at 16,700, so just under 5,000 > miles from barely within spec to substantially below. > > Thanks, > > Bryan in Arizona >