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Per various posts and first hand knowledge Harley's brand new M8 engine design does burn oil.

Apparently, Harley has issued a Technical Bulletin (TB) that allows the M8 engine to burn one quart within 1,500 miles; this amount of engine oil burn is considered to be OK.

Question: Does Indian allow their 108 cu. in. engine to burn oil like the Harley's?

The # of MOCO's TB is unknown, if someone has the TB # please post.
 

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Bro I hate to tell you but this is nothing new.



Check the date.

Sell that POS Harley and get an Indian. I hear they actually produce oil as you ride them so you can drain some off and save it for later. Way better deal.


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Ok..... I hate to jump into this as it's been discussed on several other oil threads. If you go talk to about any other auto manufacturer they will tell you the same thing. Even BMW motorcycle will tell you that amount can be considered normal. This does not mean that the manufacturer is saying that all M8' use this much oil. In fact, most don't even come close to that. Move on to another topic if you are trying to justify buying the Indian.
 

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Not sure why oil consumption is so much greater with M8s compared to Twin Cams. I’ve had 4 Twin Cams and never burned oil close to that. However if a quart every 1500 miles is considered normal, I could probably deal with that. But one guy posted that during a 2600 mile trip he had to add 4 quarts. That can’t be normal! Would that be a sumping problem?
 

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Not sure why oil consumption is so much greater with M8s compared to Twin Cams. I’ve had 4 Twin Cams and never burned oil close to that. However if a quart every 1500 miles is considered normal, I could probably deal with that. But one guy posted that during a 2600 mile trip he had to add 4 quarts. That can’t be normal! Would that be a sumping problem?
Most likely was sumping. That is becoming old news now though as there have been various fixes and it just doesn't show up anymore and it wasn't nearly as prevalent as the internet and some aftermarket shops led people to believe. Granted it should have never been an issue but even BMW is going through a pretty big recall with a trans issues on the K1600's. It happens.....
 

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Not sure why oil consumption is so much greater with M8s compared to Twin Cams. I’ve had 4 Twin Cams and never burned oil close to that. However if a quart every 1500 miles is considered normal, I could probably deal with that. But one guy posted that during a 2600 mile trip he had to add 4 quarts. That can’t be normal! Would that be a sumping problem?
I never had to add oil in any of my twin cams and so far, I haven't had to add oil in my M8. Because "one guy posted" it, that doesn't means it's common or even true.
 

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i've never had a bike that i've had to add oil between 5,000 mile oil changes. and since 2002, i've owned 9 bikes (well, between the wife and i).

if the oil level changed, it was minimal. not like it started at full and at the oil change was down near add.
 

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Neither one of my 19s use any oil in between oil changes. My 16 didnt use oil. My 84 Shovel didnt use oil. My 48 Pan used oil. (Indian was still in business when that bike was built) and a few of my other Shovels did. Who cares what the Indian does?
 

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No mechanical reason for an M8 to burn more oil than a twin cam. Its basically the same ring package with similar clearances. Perhaps I should say published clearances. But oil consumption would be a symptom of sumping. It might also be a symptem of a leaking gasket on a piston jet. Spraying the cylinder wall as opposed to the underside of the piston.

With that said, the M8 breather valve is a real piece of work. And the MoCo knew it. The M8 air box is built so that it holds the carry over oil in the throttle body throat as opposed to letting it drip all over the side of the scooter. I have no idea as to how much oil the bad ones are passing, but have seen several that had filled that low area and were beginning to back up into the plastic throttle body.

Some breathers have been found with cut orings and some have been found improperly installed. But I doubt that was the whole issue, despite what the MoCo has to say about it. Now the problem is that changing that little piece of plastic crap involves the EPA,CARB, and the EU. So I doubt it happens unless the oil use becomes more of an issue that it is now.
 

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Discussion Starter #11
Bro I hate to tell you but this is nothing new.



Check the date.

Sell that POS Harley and get an Indian. I hear they actually produce oil as you ride them so you can drain some off and save it for later. Way better deal.


Sent from my iPhone using Tapatalk
I have seen this sheet before and it addresses 2005-2006 models of the TwimCam; this sheet does not cover M8's.

Is there a Technical Bulletin (TB) that allows the M8 engine to burn oil, or is this an urban myth?
.
 
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Ok..... I hate to jump into this as it's been discussed on several other oil threads. If you go talk to about any other auto manufacturer they will tell you the same thing. Even BMW motorcycle will tell you that amount can be considered normal. This does not mean that the manufacturer is saying that all M8' use this much oil. In fact, most don't even come close to that. Move on to another topic if you are trying to justify buying the Indian.
Hell, BMW cars! I have a 2013 535, every now and then I need to add a quart. I asked about it at the dealer, they gave me a sheet explaining it. Seemed like all the service writes had copies in their top drawers.
 

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I have seen this sheet before and it addresses 2005-2006 models of the TwimCam; this sheet does not cover M8's.

Is there a Technical Bulletin (TB) that allows the M8 engine to burn oil, or is this an urban myth?
.
Doesn't seem like you quite understand what everyone is trying to point out here. It also seems like you may have an issue with the M8's and you are focused on trying to make them look like they are major oil burners. I'm not really sure though but that's how I'm reading it. Yes that sheet in particular addresses 2006-2006 TC models but there are probably other documents that addresses all the other years because in applies to them as well. Understand that just because you might have to add a quart of oil to an M8 or a TC in 1k, 3k or even 5k miles it doesn't necessarily mean that it is burning the oil. The oil could be puking through the crank case breathers and into the A/C. Very common and normal in most cases as long as it's not excessive or as long as there isn't another issue with the engine that is causing it.
 

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I watched a couple of video's on oil consumption where this guy's M8 was using oil and he decided to do a big bore kit and cams to fix the using oil problem and make his bike faster. The mechanics at the HD shop said the reason M8's use oil was due to the oil ring, swiper ring, i think he called it, was to thin. The oil ring in the big bore kit was much thicker, no doubt. At least that was the reasons that shop came up with. Also they said that they have found on several M8 bikes that the parts that squirt oil under the pistons were loose and had to be re-torqed before they buttoned everything up. Just passing on some info i heard from a well established HD shop that i subscribe to on U tube.
 

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If you have an M8 that uses oil, the first thing you should do is check behind the air filter.

Pull the filter off and check right at the opening of the throttle bore. There is a recess there that tends to catch oil that has passed through the breather system. I've checked about a dozen now, and half were dry. The other half varied from being damp to having a spoon full of oil in the recess.

If you scooter is using oil and its wet in the recess, it needs to be checked for sumping. If its not sumping then it could be an issue with the breather in the head or a ring issue (crankcase pressure)

You can also use a bore scope to read the top of the pistons. Reading pistons is part experience and part voodoo, but basically a piston that is carboned up in the center and clean around the edges has bad oil ring seal.



In the photo the left piston shows classic oil control ring issues. And because its just on one side of the piston, the jug would be suspect. And on examination the jug was out of round. And this one was smoking under a hard load. Most will not read this easy, the clear margin will be much narrower.

Now if you have one that sucks oil through the throttle bore, the quick fix is to vent it to the atmosphere. Doing so will not earn you any suckup points with the EPA, but it will cure the issue and costs less than $20 to do.
 
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