Used 17 or 18 - anyway to tell if its sumped?
Looking at some 17 and 18 used bikes. My initial thought was to stay away from 17's with the idea that 18's might be alittle better? The bikes are in the 6K to 18K mile range. Anyway to tell if the bike has had issues with sumping?
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Not really other than listening for noises and lack of response. Best way would be ride it in an aggressive manner and hit higher RPM, you'll get a pretty good idea.
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Originally Posted by desertwolf
(Post 18371710)
Looking at some 17 and 18 used bikes. My initial thought was to stay away from 17's with the idea that 18's might be alittle better? The bikes are in the 6K to 18K mile range. Anyway to tell if the bike has had issues with sumping?
You can ask for the warranty history. You can ride them and if they run good they run good. If you are worried about sumping and or Transfer, have the dealer upgrade the pump and back plate along with the Primary vent to current production. then enjoy the ride. |
Sumping ?
If you are talking about true sumping, that is the transfer of engine oil into the primary housing. Most of the 17-18 bikes had a transfer problem with trans fluid into the primary and Harley came up with a fix for that...It was a inner primary vent. My bike had that fix installed about a month ago and has had no noticeable transfer since.
Just ask the dealer if the new inner primary vent has been installed on the bikes your looking for. |
The 18's were built no differently than the 17's, so don't expect a difference there. As stated, review the warranty history with the dealer for any bike you're interested in, and buy whatever fits your desire and budget. Keep in mind the vast majority of those bikes did not and will not sump, despite what the forums might indicate.
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Originally Posted by dyna rider
(Post 18371837)
If you are talking about true sumping, that is the transfer of engine oil into the primary housing.
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Originally Posted by desertwolf
(Post 18371710)
Looking at some 17 and 18 used bikes. My initial thought was to stay away from 17's with the idea that 18's might be alittle better? The bikes are in the 6K to 18K mile range. Anyway to tell if the bike has had issues with sumping?
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2 simple methods to check if an M8 bike has or will sump.
1) As already stated, ask the owner for permission to take the bike’s VIN # to any dealer and ask for the service records 2) Ask the owner if you can take the bike for a 45min to 1hr test ride. Check the oil level before you leave and then check it when you return after a “healthy” ride. If the dipstick oil level from before to after is more than 2-3 dots lower, then politely RUN away from the bike. |
Does sumping ever do permanent damage though ? I know they slow down on their own, from so much oil in the crankcase, but aren't the journals at that time getting a lot of air from the oil pump ? Or is there so much in the crankcase, it doesn't make a difference ? Plenty of oil anyway, so nothing got scored... ?
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Originally Posted by Ericson38
(Post 18372129)
Does sumping ever do permanent damage though ? I know they slow down on their own, from so much oil in the crankcase, but aren't the journals at that time getting a lot of air from the oil pump ? Or is there so much in the crankcase, it doesn't make a difference ? Plenty of oil anyway, so nothing got scored... ?
Sumping can be very subtle at first and for someone that has never experienced it, its doubtful they would be able to detect it, til the bike has lost serious power. At that point, the damage may already be done. The problem is TOO much oil which causes massive friction around the crank which in turn creates enormous heat. Heat can kill an engine. I had 3 M8 engines with bearing damage that required the engines to be replaced under warranty. |
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