Training Wheel Hero
Join Date: Jan 2015
Location: Boston, MA
Thanked 5 Times in 4 Posts
Feedback Score: 0 reviews
Diagnose this Spark Plug!
Hi All, what can you tell me about my engine based on this sparkplug? Did this break as I was removing it with the Honda tool or could it have broken while the engine was running?
Bit of a background ... one night I was riding the RPMs significantly decreased and the sound of the engine changed quite a bit. I got off the highway and noticed a long trail of white smoke coming out of the exhaust. I was still able to ride, but I could tell something was definitely very wrong so I shut the bike off and walked it home (i was less than a mile away, luckily). It felt like a cylinder wasnt firing. My first guess on the smoke was coolant, but not sure. I have everything taken apart and have been trying to disgnose the issue by inspecting each part that gets taken off. Im down to the valve shims at this point and nothing seems to be glaringly wrong other than two of the sparkplugs (see the attached pic). Any help would be much appreciated! Thanks!
Custom Interlagos "BMW" Blue & Black Paint
Driven 520 Conversion Gold Chain and Sprocket Kit
Zero Gravity Double Bubble Windscreen
CRG Shorty Levers Black w/ Gold Adjuster
Driven Gold Mirror Block-Off Plates
Spiegler Steel Braided Front/Rear Brake Lines
Driven Gold D3 Grips
Bar End Mirrors
Flushmounts & Integrated Turn Signals
Metzeler Sportec M7 RR Tyres
Gold HONDA Decal
Gold Rim Tape from MotoInkz