I don't think anyone that really knows would be posting about it in this forum.

From what Harley marketing information I have read is that the engine is all new, it is modular and comes in different sizes from 500cc to 1250cc. Now my thinking that is a huge range of engine size to share components. Either the 500cc bikes are going to be way overbuilt and heavy (but they'll run forever) or the 1250 bikes are going to grenade way too soon. But I don't think it will be as simple as buying a 500cc bike and slapping a set of 1250 jugs on it like you can do with an 883cc Sportster.

 

They've announced that there will be four displacements: 500, 750, 975 and 1250. They've announced that it's a water-cooled v-twin, and I think they even announced that it was going to be 60 degrees.

They already have an all-new, water-cooled 60-degree V-twin in 500 and 750 displacements. What possible reason would they have to abandon that and re-engineer an all-new water-cooled v-twin at 60 degrees? So -- why wouldn't the engine for the new bikes be a version of the Revolution X?

 

M8 debacle? Um... have you actually ridden an M8 engined bike?

 

Yeah I have actually, local dealer was doing a test ride day and I was invited I guess cos I brought my bike from there.

Plenty of torque, effortless power found the windshield too high and the bike was way heavy for my liking.

But just to clarify !!!! This wasnt one of those sumping stage 4’s mothership is still dealing with.

Thanks for asking cheers

Wiz 🍻

 

Stage 4 sumping is way overhyped and effects like .02% of the bikes out there. That is hardly a "debacle".

 

Really 2 tenths of 1 percent ?.

Maybe you need to pop over to the M8 thread and tell all those guys that spent 30K + on a M8 powered scoot ,

It’s all in their minds 🤪

My old air cooled 17 floppa dunga 1200 custom looks pretty good right now.

Thanks for your concern

Wiz Out 🍻

 

From the photos they have released to date it looks to be a modified version of the Revolution X engine. It appears to have a 4 valve dual overhead cam setup very similar to the heads that showed up on the AMA Flat track bike this last season. So with the new heads I'm sure marketing will be calling it a new engine as that sounds better than just a warmed over old engine that was way under powered in the 500 and 750 version when you stacked it up against the competitors offerings.

 

The block looks different also, harley has been saying this is an all new motor

 

Depends on what you consider competitors of course. The original Revolution X left some power on the table, but in a 2015 six-way comparison of middleweight cruisers the Harley Street 750 had the second-highest hp of the group, and the only one that had more hp also had another 115cc of displacement (55.9 @ 865cc vs the xg750's 55.6 hp).

If you're comparing to 650-750cc sport bikes, then yeah there's no comparison at all.

The revised version of the Revolution X in the Street Rod is decent, it makes around 95 hp/liter... But the biggest problem performance wise IMO is the extreme pork. They've got to get weight competitive. The Street 500 is over 500 lbs! A 500+ pound 500cc isn't going to be competitive against anything.

As long as Harley stays wedded to only ever considering a V-twin design, they're going to give up HP to the competition.