Engine mounting bolts - Kawasaki KLR 650 Forum
1987 to 2007 Wrenching & Mods For maintaining, repair or modifications of Generation 1 KLR's. 2007 and earlier.

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post #1 of 3 Old 03-28-2019, 07:30 PM Thread Starter
1st Gear
Join Date: Mar 2017
Location: SW Colorado
Posts: 32
Engine mounting bolts

Anybody know whether the engine mounting bolts are compression threaded? I have the engine out of my '05 KLR and was inspecting the large rear mounting bolt. The nut starts onto the first thread or more of the bolt then gets snug/stops and is finger tight. I've closely inspected the threads of the nut and bolt and they look good. Tried cleaning them and slowly tightening with the wrench. It doesn't look like they are cross-threading, but thought I'd ask about the possibility that they are compression before I go further. Thanks!
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post #2 of 3 Old 03-29-2019, 11:11 AM
Join Date: Nov 2009
Location: Lander, Wyoming
Posts: 6,240
Sounds like you are actually working with the Swingarm Pivot bolt, yes it anchors the engine as well. Many times while driving the larger, longer bolts out during disassembly ones punch gets off to the side and damages/compresses the threads.
No, its not manufactured as a compression thread.

You could take the bolt & nut to a shop and have them pass a thread chaser or die over the bolt & a tap thru the nut. Most likely its the bolt threads. Should be able to spin it on with fingers.
Tool companies also make thread files. 8 inch long, 1/2 inch square so always have 2 - 3 threads overlaping on clean straight threads as repairing the damaged tip or side.
Double ended so has 8 thread sizes on one file. Ours are New Britain brand, we've had them over 40 years. They even work on Left Hand Threads!

Modify at "YOUR OWN RISK"!

Still riding my 1987 KL650-A1. 85,000+ miles & counting

Last edited by pdwestman; 04-02-2019 at 10:14 AM. Reason: spelling
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post #3 of 3 Old 04-02-2019, 08:19 AM Thread Starter
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Join Date: Mar 2017
Location: SW Colorado
Posts: 32
Ok, thanks!!
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