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49 Posts
I know this subject has been covered with many posts over the yrs but I thought I would give those a heads up who think this can be put off. I have a 2017 dl 650 I bought used with 8400 miles in July.I now have 15,500 on it. I was planning on doing it a 14,500 ( 24k) but I am doing a few other things to it and wanted to do it all at once ,and had to get a few things together. And the riding weather in Md has been pretty nice so far this winter).
So here is what I found
Front cylinder. Both Exhaust were .18mm .Thats .02 under minimums.
Intake- One at .15mm ,and one at .12
Rear Cylinder- Exhaust- both at .20mm (min)
Intake- both at .12mm
So out of 8 valves I am changing 7 of them, The bike has been running great, plugs looked good although gaps were at .040. I have new ones although they certainly could be used after re gapping. So the lesson here is, the factory interval should not be ignored unless you are the gambling type. I cannot imagine going thousands of miles more with under min exhaust valves.
So here is what I found
Front cylinder. Both Exhaust were .18mm .Thats .02 under minimums.
Intake- One at .15mm ,and one at .12
Rear Cylinder- Exhaust- both at .20mm (min)
Intake- both at .12mm
So out of 8 valves I am changing 7 of them, The bike has been running great, plugs looked good although gaps were at .040. I have new ones although they certainly could be used after re gapping. So the lesson here is, the factory interval should not be ignored unless you are the gambling type. I cannot imagine going thousands of miles more with under min exhaust valves.