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I heard today that the 2018 engine is not symmetrical from the left to right side. That between the left and right side, one side is more forward than the other. Has anyone noticed this or heard this? Just doesn't sound right and I plan on looking this evening and measuring. Thinking Honda could have done better and made the bike symmetrical in the design if this was true.
 

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uh, all of them are that way, 1975 thru the present.

think about the rod journals, both sides can't be connected to the same exact point on the crankshaft, one side has to be forward of the other side.
 

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It’s identical on both sides just offset like John said
 
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I heard today that the 2018 engine is not symmetrical from the left to right side. That between the left and right side, one side is more forward than the other. Has anyone noticed this or heard this? Just doesn't sound right and I plan on looking this evening and measuring. Thinking Honda could have done better and made the bike symmetrical in the design if this was true.
Not sure what you mean but if you are asking if #1 and #2 are directly across from each other the answer has to be no. Any V. Y or flat has to have some offset. The only way the cylinders could reciprocate on a straight line they would have to share the same area on the same crankshaft pin as John and Jim said above. . Pretty hard to do and not sure why you would want it. It would be pretty funky and very unusual for what reason?
 

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Could be done with harley rods,but who wants one of those?
 

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The only engine other than Harley that uses a "forked" rod to keep cylinders in line that i know off was the Rolls Merlin/Meteor/Gryphon range, now that was a nice power plant, Jay Leno has a vintage looking Bently with a 27ltr Meteor in it built in UK by Pederson(i think)
 

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I heard today that the 2018 engine is not symmetrical from the left to right side. That between the left and right side, one side is more forward than the other. Has anyone noticed this or heard this? Just doesn't sound right and I plan on looking this evening and measuring. Thinking Honda could have done better and made the bike symmetrical in the design if this was true.
Whoever said that must be a rookie on engines. It's definitely nothing new.
 

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The only engine other than Harley that uses a "forked" rod to keep cylinders in line that i know off was the Rolls Merlin/Meteor/Gryphon range, now that was a nice power plant, Jay Leno has a vintage looking Bently with a 27ltr Meteor in it built in UK by Pederson(i think)
I never heard os any of those engines. LOL :p :oops:😎:love:
 

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Tank and airplane motors,British
 

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Tank and airplane motors,British
Radial engines are symmetrical.
It seems I remember in their into video the Honda people said the 2018 was less offset than the previous engines.
 

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If they were the same, then which side would be #1? 😇

Pretty much all engines are like that. It’s the way the rods fit on the crank. Already been said.
David
 

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Well they did fit the Merlin made under licence in US(Packard i believe) into the P51 mustang to give it the power it needed
 

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GL-1500 looking down from above, note the cam covers which are on the heads, you can see that the right side is slightly ahead of the left. The difference is roughly the same as the thickness of a connecting rod. It's also why the right side cam belt is ahead of the left side one. Unless you are the rider looking down, you can't see both sides at the same time. They could "make them equal", but it would waste a lot of material, add weight too, create dead space, need one longer cam, etc. Ignore the writing, just a picture I used to show my floorboard mods.

323621


Subaru does it with changes in engineering and uses just 1 timing belt.
 

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No the packard merlin was a 24 or 27 liter v12, same engine used in Spitfire, Hurricane, Mosquito,Lancaster and others.
I have had the great pleasure to be in a Lancaster whilst taxying so 4 merlins at the same time, the sound is unbelievable
 

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My Dad was a Wireless Operator on a Lancaster during WWII - every time I hear those 4 Merlins singing together in a video I get teary-eyed...nothing sounds quite like that!
 

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i see them in tractor pulling units,I think parts are scarce,Didn’t Art Arfons use them in his land speed records?
just looked,he used Allisons
 

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What I do not understand is why I read this whole ridiculous thread.
 
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Just cos its there!!
Merlin parts are there and at least 2 firms in UK specialise in rebuilding them, even having cylinder heads recast. Was a meteor(same engine not supercharged) nos army rebuild on ebay UK for £9000 late last year.
 
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