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Old 03-24-2019, 12:48 PM   #46 (permalink)
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For transfer fix, look into the fat clutch pushrod talked about on other sites.
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Old 03-28-2019, 10:39 PM   #47 (permalink)
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I don't have an M8 but my brother rides one so I have to ask. What are the signs/symptoms of these engines sumping? Also, could someone explain to me exactly what sumping is? Sorry, don't mean to seem dumb on this topic but I have read about sumping several times but don't fully understand what's going on when it happens. Thanks.
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Old 03-29-2019, 05:22 PM   #48 (permalink)
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I did some searching and read what sumping is. He doesn't ride aggressive and from what I've read that may have something to do with it. I will pass on to him the oil level check procedure to be sure he knows.
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Old 05-22-2019, 01:44 PM   #49 (permalink)
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Just had this one come across, o-ring for oil pick up in crank case..



125 miles with new upgraded pump and housing off the line..



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Old 05-22-2019, 02:48 PM   #50 (permalink)
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Quote:
Originally Posted by Kickman View Post
Just had this one come across, o-ring for oil pick up in crank case..



125 miles with new upgraded pump and housing off the line..
What caused that? Poor install? It looks worn / burned / melted?

Is that the likely cause of a specific instance of "sumping"?
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Old 05-22-2019, 03:05 PM   #51 (permalink)
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M8 sumping

Quote:
Originally Posted by FishinFather View Post
What caused that? Poor install? It looks worn / burned / melted?



Is that the likely cause of a specific instance of "sumping"?


Poor install from factory, I cant even remember how many times since 2001 I've seen this. The worn look is the yellow coating over the ring runned off it's normal, the big chunk missing is where it was dislodged and rolled into the port from the oil pump pick up port during installation.

This will cause many different conditions.

In this instance oil level fluctuations on the stick, normal to low, to over filled, to corrected, to low, lead to inspections. More than 6ozs of oil out of the CKP hole bottom of the case, on Milwaukee 8s is considered need for inspection.

No engine braking or loss of power was reported, however these complaints tend to come from riders who are advanced riders, and larger displacement engines.

A causal rider may not realize its happening, further more, lower RPM operation would limit the ability of the pump to cause conditions that would promote sumping..

Fact. They Milwaukee 8 pumps move 6 gallons of oil per minute...

Last edited by Kickman; 05-22-2019 at 03:11 PM.
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Old 05-28-2019, 05:53 PM   #52 (permalink)
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30,000 miles and tugging a sidecar. Been beating it hard in this heat, in the Smoky's. This even I opened the primary cover just to check. Again not a drop transferred.
Nor has it showed a sump issue.
Checking for sumpping is easy to do.
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Old 05-28-2019, 11:18 PM   #53 (permalink)
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30,000 miles and tugging a sidecar. Been beating it hard in this heat, in the Smoky's. This even I opened the primary cover just to check. Again not a drop transferred.
Nor has it showed a sump issue.
Checking for sumpping is easy to do.
Good deal.....side car around the Smokies must be a little hairy !! I live near there and being able to pull the bike over inna curve is needed alot in the mtns!!.....anyway.....you say its easy to check sumping, explain...

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Old 05-29-2019, 04:25 PM   #54 (permalink)
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smitty901 is still riding a stock bike smitty901 is still riding a stock bike
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Good deal.....side car around the Smokies must be a little hairy !! I live near there and being able to pull the bike over inna curve is needed alot in the mtns!!.....anyway.....you say its easy to check sumping, explain...

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Run the bike until hot. Let it idle a minute of so shut down.
Remove crank sensor from underside of engine catch oil that comes out . Measure it. less than 6 Oz you are good. more you have an issue.
Been riding it hard here in the 80-97 degree temps. Sidecar handles like a dream. Road to into NC a bit today made loop back. It was a great day to ride.
I really wanted to put the car tire on the rear of the bike to a test on this trip. It has proven to be a great way to go.
Because it is a sidecar you don't see the lean but it is being pushed through the curve
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Old 06-04-2019, 09:40 AM   #55 (permalink)
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There are some good videos out there on sumping from Steve from GMR, he's saying when they've encountered sumping issues its because of loose piston cooling jets. The piston jets are bolted to a direct oil passage, when they are loose, it impacts the flow.
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