#ygrps-yiv-454080585 {margin:0.7em;}#ygrps-yiv-454080585 p {margin:0;}#ygrps-yiv-454080585 .ygrps-yiv-454080585OECFntDef {font-family:"Segoe UI", Tahoma, Verdana, Arial, Helvetica, sans-serif;font-size:10pt;} Being a one cylinder engine, there is but one big piston and counterweight set on the crankshaft. Singles shake and some designs, like the KLR, incorporate additional shaft(s) that spin smaller weights to counteract the vibrations a good bit. It's not 100% smooth. But, it definitely helps. The "doohickey" is a small lever that tightens the counter-balancer shaft's drive chain slack whenever the adjustment bolt is slightly loosened. The spring on the lever pulls it and rotates an eccentric shaft holding an idler sprocket for the chain - tightening up the chain and restoring the proper timing of the counter balancer parts. The adjustment bolt is tightened again to secure it in place. If the Doo breaks, the spring can come loose (along with the broken "doo" parts) and fall into the moving parts of the engine - possibly causing catastrophic damage. At the least, the broken parts fall down inside the case and the counter balancer assembly gets out of time with the rest of the reciprocating parts and the result is a bunch of vibration.
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-eddie Original Message:
From: aminklr650@... [DSN_KLR650] DSN_KLR650@yahoogroups.com>
Reply-To: DSN_KLR650@yahoogroups.com>,
To: DSN_KLR650@yahoogroups.com>
Sent: 11/19/2015 3:36:29 AM
Subject: [DSN_KLR650] KLR 650 Doohickey
Hello fellow KLR owners,
I have a 2006 KLR 650 that I have been riding since I bought it new, and I am ashamed to say that I am not very familiar with the internal anatomy of the bike and by no means am I a mechanic. All I have ever done on this bike is oil changes and I barely hit 4000 miles recently. However, I am extremely curious about doing this "Doohickey" upgrade since many people say that the stock components are prone to failure I would like to know some background. I have been reading a lot about doing the Doohickey upgrade to the "Eagle Mike" components, so before I purchase a set, I'd like to understand what it is exactly that I'm "fixing." I have been looking up the youtube videos on the repair, but I have failed to understand what the function of these parts are. I understand that they break over time, but it's been bugging me that I don't have a full knowledge of why and what I would be replacing.
In simple terms, what does the Balancer Idle Lever & Spring do? Also, what does to the balancer chain do?
After all my research, I have basically only been able to understand that the Eagle Mfg. idle-shaft lever and spring replaces the weak stock unit.
Please give me a crash course on the questions and concerns I have asked. Simple engine terminology would be greatly appreciated as I said before that I am a total ignoramus when it comes to engine mechanics and functions (feel free to define components for me as I really love to learn about these things).
Thanks very much,
Amin