- Joined
- Feb 7, 2009
- Messages
- 12,536
- Reaction score
- 1,182
- Points
- 113
- Location
- Cape Coral, Florida, USA
Long story short.
I've been chasing a vib, very high frequency,definitly engine RPM related.
After many checks, adjustments, re-setting engine position-torque, sync, etc, I found the issue...
After doing a spark plug wire shortening(didn't need it, no arcing, two slightly loose) I checked the
spark plugs.
Two were about finger tight, the two maybe 5' lbs holding them in. Pulled the NGK Iridiums
which had a decent color, and checked the gaps. When initially installed 12,000 miles ago, they were
at .027-.028". Now, they were at .032", .033", .034" and ,034.5"
Picked up some new ones, re-gapped (only one was at .028") the rest were about 030", .031"
and re-assembled... No more de-cel vibs thru the seat, and rt foot peg, noticeably smoother, back to
normal... (that's a Big SMILE)
Plugs were the last thing (especially Iridiums) I thought would be the issue but in fact,
they DO NOT LAST indefinitely. Count on changing them pretty much as you would the stock plugs..
As far as I'm concerned, they get R&Red every 12K miles. Just something to pay attention to for maintenance
and / or running issues..
I've been chasing a vib, very high frequency,definitly engine RPM related.
After many checks, adjustments, re-setting engine position-torque, sync, etc, I found the issue...
After doing a spark plug wire shortening(didn't need it, no arcing, two slightly loose) I checked the
spark plugs.
Two were about finger tight, the two maybe 5' lbs holding them in. Pulled the NGK Iridiums
which had a decent color, and checked the gaps. When initially installed 12,000 miles ago, they were
at .027-.028". Now, they were at .032", .033", .034" and ,034.5"
Picked up some new ones, re-gapped (only one was at .028") the rest were about 030", .031"
and re-assembled... No more de-cel vibs thru the seat, and rt foot peg, noticeably smoother, back to
normal... (that's a Big SMILE)
Plugs were the last thing (especially Iridiums) I thought would be the issue but in fact,
they DO NOT LAST indefinitely. Count on changing them pretty much as you would the stock plugs..
As far as I'm concerned, they get R&Red every 12K miles. Just something to pay attention to for maintenance
and / or running issues..