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Posted by testpilot
- September 04, 2013, 07:24:58 AMIt didn't seem like it was running hot. The cooling fan cycled normally when parked and running. Temps were close to 90F on Friday but Monday they were in the high 70s & low 80s. Detonation was the same.
Posted by dakuhosu
- September 03, 2013, 18:17:00 PMOverheating, possibly? Hot heads will detonate before spark. Did it seem like it was hot at all?
Posted by testpilot
- September 03, 2013, 18:10:45 PMI just returned from a 1,200 mile trip on my 05 Drifter 1500 that took me through the hills of WV and VA. I noticed a lot of spark knock on acceleration at speeds of around 75 mph and up while pulling up long grades. I had to either allow my speed to drop off or run it in 4th gear to prevent the pinging. I used 93 octane throughout the trip. At the half way point, I bought a can of Sea Foam and put about 1/3 of it in the tank at the next three fillups without any change in the detonation/pre-ignition. I pulled all four plugs after the trip and they all have a nice light tan color. Spark plugs are NGK DPR6EA-9. Cooling system is full and seems to be working OK. Cooling fan cycles as it should when parked and idling. The bike just turned 10,000 miles this weekend. Any ideas?