Valve Seat Issues?

[richbiker]

Antone else seen M8 Valve seats bad?

https://www.facebook.com/100157792180/videos/10154969685867181/

[rbabos]

Oh great.
Ron

[BVHOG]

Just saw that today, with the diminishing quality of the MoCo I am not even a little surprised.

[No Cents]

  they are going to be lined up at the dealerships now for leak down tests to be done after TR posted that video. 
Those M8's still scare me.

[1FSTRK]

 
Great job by TR getting the word out, very well done video with good information including what percentage of problem heads and honest sample size.

[HV]

MOCO says normal Leak dome is up to 13% 

[BVHOG]

You don't suppose lean mixture, late ignition timing and excessive heat has anything to do with this do you?

[1FSTRK]

TR indicated it was a machining problem.
There did not appear to be any high heat signs on the heads in the video.

[FSG]

1 bad replace all 4  ,   

[Durwood]

  they are going to be lined up at the dealerships now for leak down tests to be done after TR posted that video. 
Those M8's still scare me.

I recently tested mine and it was less than 1% on both cylinders, I guess my bike was built in the middle of the week.

You don't suppose lean mixture, late ignition timing and excessive heat has anything to do with this do you?

Definite possibility Bob..My shop bike had one mile on it when I put it on the dyno for the initial break in and tune.

Oh great.
Ron

Come on Ron, tell us how you really feel.

[Durwood]

I just chatted with Wes Brown and he hasn't seen any loose seats yet.

[1FSTRK]

I just chatted with Wes Brown and he hasn't seen any loose seats yet.

I think one point of the video is, is anyone else checking? It does appear that they could get past a visual check.

[prodrag1320]

You don't suppose lean mixture, late ignition timing and excessive heat has anything to do with this do you?

on a properly installed seat,none of this would result in a seat coming loose.i havnt seen any loose seats yet,but I really havnt been looking for one either

[badcooky]

The video looked seriously bogus .

[Herko]

MOCO says normal Leak dome is up to 13% 

Wow.

[rbabos]

  they are going to be lined up at the dealerships now for leak down tests to be done after TR posted that video. 
Those M8's still scare me.

I recently tested mine and it was less than 1% on both cylinders, I guess my bike was built in the middle of the week.

You don't suppose lean mixture, late ignition timing and excessive heat has anything to do with this do you?

Definite possibility Bob..My shop bike had one mile on it when I put it on the dyno for the initial break in and tune.

Oh great.
Ron

Come on Ron, tell us how you really feel.

Well, I do like the whole M8 thing and was considering one for a while. Problem is, the quality issues just keep coming. Issues that should not be there in the first place and if any are there, they should be looked after, not specs provided to justify the problem rather then resolve the issues. That burns my ass to no end.  My V rod may very well be the last HD I own. If they could get the M8 to the reliability state of the Revolution drive train MoCo could have the world by the ass. With the current mind set of the company it looks they are heading the other direction. Who in their right gear head mind could accept loose valve seats and be told 13% leak down is acceptable for the cost of these things? Not me.
Ron

[Buglet]

   Durwood
                  What pressure did you use to check the leak down, did you check it at BDC, TDC, and in the middle. Thanks.     

[koko3052]

Cost keeps going up....quality keeps going down.

[FSG]

The video looked seriously bogus .

Are you serious ?

[Ohio HD]

The video looked seriously bogus .

Having met Tom on two occasions at the Ohio Mile, talking Twin Cams and Sportsters (he was racing a Sportster there), he's a super knowledgeable guy, very pleasant, and also listens to you. I believe he wouldn't put something in public view if he had not seen this as an issue. Not to mention his reputation as being a straight up shop owner.

[HV]

MOCO says normal Leak dome is up to 13% 

Wow.

To be honest they say close to 20% is nothing to worry about ....Id have to disagree with that ....but I havent seen any close to that yet ....I guess High Mileage will tell the story FYI a Dealer is not going to replace seats ....just complete heads

[wfolarry]

I remember the Evo Sprtsters having the same issue. Standard test was to slam them on a piece of wood & see if the seats fall out. Wasn't a major problem but it was something you checked when you had one that was running bad & you ruled out everything else before you took it apart. If it is a problem [this is the first I heard of it] the MOCO will just increase the press fit & keep right on building bikes.
I do think what Durwood said makes a difference. Good tune always helps & never hurts. 
Most of the failures I seen were heat related. With water cooling & oil cooling I don't see it becoming a major problem.

[Durwood]

   Durwood
                  What pressure did you use to check the leak down, did you check it at BDC, TDC, and in the middle. Thanks.   

I checked it at the bottom and top, not the middle.

[04 SE Deuce]

   Maybe they can pressurize the primary with some of the blow-by so the trans lube will stay in the trans.

Makes me laugh when people state Harley quality is going down...they use to make some real junk.  Harley has always had an absurd amount of difficulty with design changes compared to Japanese bikes.  The M8 will be fine once sorted.

[rbabos]

  Maybe they can pressurize the primary with some of the blow-by so the trans lube will stay in the trans.

Makes me laugh when people state Harley quality is going down...they use to make some real junk.  Harley has always had an absurd amount of difficulty with design changes compared to Japanese bikes. The M8 will be fine once sorted.

Sure it will be sorted. In the mean time, I'll let others make donations to their bottom line while they take their sweet ass time solving issues and get it where it should have been in the first place. It was mentioned he EVO Sportsters had this issue at first. Does this company ever learn from their mistakes?
Ron