spark plug

[Gerald Autler]

I recently checked my valve clearances and found them to be within the tolerances--at least those that were in the KLR600 book I have. The numbers given are .10-.20 for inlet, .15-.25 for exhaust. Then, sometime after that, I saw very different numbers listed somewhere on the web (can't remember where). I know I shouldn't trust everything I read on the Internet, but it did make me wonder... Can anyone confirm the numbers that I went by? I was told that all the important stuff in the KLR600 book is relevant for the 650 as well. Thanks, Gerald

[John Lyon]

Gerald: Clearances for KLR 650A: Intake: 0.10mm 0.20mm (0.004in 0.008in) Exhaust: 0.15mm 0.25mm (0.006in 0.010in) John --- Gerald Autler wrote:

> I recently checked my valve clearances and found > them to be within the > tolerances--at least those that were in the KLR600 > book I have. The > numbers given are .10-.20 for inlet, .15-.25 for > exhaust. Then, > sometime after that, I saw very different numbers > listed somewhere on > the web (can't remember where). I know I shouldn't > trust everything I > read on the Internet, but it did make me wonder... > > Can anyone confirm the numbers that I went by? I > was told that all the > important stuff in the KLR600 book is relevant for > the 650 as well. > > Thanks, > > Gerald

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[Mark St.Hilaire, Sr]

> tolerances--at least those that were in the KLR600 book I have. The > numbers given are .10-.20 for inlet, .15-.25 for exhaust. Then, > sometime after that, I saw very different numbers listed somewhere on > the web (can't remember where). I know I shouldn't trust everything I > read on the Internet, but it did make me wonder...

That's right on the money... Mark Wise men still seek Him... Mark St.Hilaire, Sr HomePage: http://home.adelphia.net/~msaint/index.html KLR650 Motorcycle Pages: http://klr6500.tripod.com/ My Adelphia Email can be "iffy." If you don't get a response, please try: KLR6500@...

[Michael Koch]

I just did my first valve adjustment. One intake valve was below minimum clearance, one exhaust was at the minimum and the other two were in the middle. I adjusted all of them so they would be at or as close as possible to maximum specification. What are the effects of running too tight or too loose valve clearances, in terms of engine noise and performance? Is either condition more likely to result in premature or excessive wear of the valve train?

[Yahoo]

Planning to do my valve check today... A new plug it is. BTW how close to clearances would it be OK for you guys to button back up without changing shims. Sent from my iPhone

On Sep 12, 2015, at 12:29 AM, "walk9940@... [DSN_KLR650]" DSN_KLR650@yahoogroups.com> wrote:

  I have been reading through the spark plug discussion, and figured I have a few things to add.  I started using Iridium electrode spark plugs back when I was riding 50cc two strokes 20 years ago.  Iridium electrodes are an engineers dream because they are thin enough to focus the spark, yet resistant to erosion.  Because of the fine electrode, iridium plugs also are extremely resistant to fouling.  I have been able to use some weak ignitions (old Femsatronic) successfully because of this.  The concentrated spark is also more efficient at igniting the fuel charge.  This translates into more engine output and or better fuel economy.  There are many dissertations out there that prove that iridium plugs are more than snake oil such as a split fire plugs etc.  Iridium plugs are also OEM on most cars these days.  In my experience, from my weed wacker to my car, Iridium plugs mean hassle free starting(ethanol bunged up carbs excepted).   While we are talking about fancy electrodes, it is worth noting that some coil pack engines will share a coil pack for 2 spark plugs.  The result is that one plug will have the spark jump from the center electrode to the ground electrode, and the other will jump from the ground electrode to the center electrode.  Looking at a set of worn plugs, you will see heavy erosion on the ground electrode of these plugs.  This is where double platinum spark plugs are used.  There needs to be a resistant surface on both the ground and center electrode.  Double platinum plugs are not necessary in a single cylinder engine.    I prefer the NGK  DPR8EIX-9 in my KLR.  I buy them in a box of 4 for around $30.  When I put the 685 kit in my KLR, I had a problem with the oil scraper ring spring.  I bought the parts directly from Schnitz, and they were less than helpful at correcting the problem.   Frustrated, I installed the spring anyway.  ! At about the 4K mile mark of the Great Divide Ride, my KLR started burning oil.  On the final ride home from NM to GA, the bike was using a half qt of 50w every 100 miles.  When I tore the engine down, I could not believe that the plug was still firing.  There was just a hole in the ash from the spark.  My KLR never failed to start, which with that much oil going through the engine was a miracle to me.    When I do my valve adjustment, or when I am prepping for a big trip, I install a new plug.  For a $7 dollar part, it is not worth chancing a problem.  Leaving a spark plug in too long is also an invitation to remove the threads with the plug.  Small problems can snow ball into all sorts of unintended consequences.  Considering the hassle of removing the side covers, seat, tank, along with any obstructing luggage/farkles, it is cheap insurance to replace the spark plug in the comfort of my garage.Just my own .02. YMMV.Cheers, Doug  

[jeffsaline]

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[Yahoo]

Thanks Jeff, I got the 16 shim get from Fred at Arrowhead Motorsports..... I'm hoping that those shims plus the four I remove will suffice. Hoping to be able to finish up without  having to order more shims. Paul Sent from my iPhone

On Sep 12, 2015, at 8:08 AM, "salinej1@... [DSN_KLR650]" DSN_KLR650@yahoogroups.com> wrote:

  On Sat, 12 Sep 2015 07:23:44 -0500 "Yahoo pwhatfourever@... [DSN_KLR650]" DSN_KLR650@yahoogroups.com> writes:   Planning to do my valve check today... A new plug it is. BTW how close to clearances would it be OK for you guys to button back up without changing shims. <><><><><><> <><><><><><>   If I am going to bother with checking valve clearances I'll change the shims if the exhaust valves are less than 0.009" or the intake valves are less than 0.007".   Valve shim size increments are 0.002" so you can only get to 0.009" or 0.010" for an exhaust valve without going too large.  For the intake valves you can only get to 0.007" or 0.008" without going too large.  The shims are marked in sizes like 270, 265, 260, 255, 250, 245 etc.  That is the metric thickness of the shim.  A 270 is 2.70mm thick.  265 is 2.65mm thick etc.   Best, Jeff Saline The Beautiful Black Hills of South Dakota 75 R90/6, 03 KLR650 . . . . . .           ____________________________________________________________ [b]No Branches = Great Rates[/b] High Yield CDs Savings Accounts. 24/7 helpful customer service. allybank.com