Harley-Davidson’s New 121ci CVO Engine Has VVT

Harley-Davidson's New 121ci CVO Engine Has VVT

A few days in the past, we had been tipped off by Harley-Davidson blogger Dr. Dan Morel about photographs of an alleged new CVO Street Glide and CVO Road Glide taken from the manufacturing facility flooring. Morel has since despatched us one other photograph, providing a transparent take a look at the CVO Street Glide’s proper facet, together with proof that the brand new 121ci engine makes use of variable valve timing.

Right here’s the total picture we acquired:

Instantly, we observed two particulars that additional assist our unique report. The big consumption prominently options the quantity 121, suggesting a 121ci displacement (that’s about 1982cc, in metric numbers). This matches the 121 proven on the derby cowl on the left facet of the motorbike. The opposite element we will see is the small tab on the underside proper facet of the tank badge. Beneath the “ON” in “Harley-Davidson,” there’s a chrome tab jutting downward with some faint lettering. Wanting nearer (click on on the picture above to see a bigger model) and you may make out the letters “CVO,” additional confirming it is a new entry to Harley-Davidson’s Customized Automobile Operations line. We already assumed all of this in our preliminary report, and the brand new proof additional confirms it.

However there may be another secret revealed on this photograph. Look intently on the camshaft cowl proper above the floorboard and also you’ll discover the acquainted Bar-and-Protect brand. Now examine it to the identical space on the 2023 CVO Street Glide Restricted Anniversary under:

On the Anniversary mannequin, and on all Harley-Davidson’s current fashions with a Milwaukee-Eight engine, the camshaft cowl is completely round, with the mounting bolts positioned to both facet of the Bar-and-Protect. On the brand new 121ci engine, the quilt has the bolts above and under, and it’s not totally round, with an rectangular form protruding towards the entrance of the bike. We cropped the photograph tighter under, and regardless of the pixelation, three small white letters are seen on this protruding part: “VVT”.

Harley-Davidson already presents VVT on its Revolution Max fashions just like the Pan America, however thus far, all of its Milwaukee-Eight engines make use of a standard timing system. With emissions restrictions getting tighter and tighter, VVT might assist its air-cooled V-Twins stay compliant for just a few extra years.

A brand new VVT system would additionally clarify one of many questions we had in regards to the engine’s displacement. As we famous in our unique story, the 121ci is a brand new engine measurement, and surprising, as the present CVO Milwaukee-Eight 117 engine already had a Screamin’ Eagle Stage III improve equipment that may take it to 122ci. It appeared odd that the brand new CVO Street Glide didn’t simply undertake that equipment as normal. The one logical rationalization is that the brand new CVO supplied one thing else that required additional adjustments from the present engines, corresponding to VVT.

There additionally seems to be a change to the transmission cowl, the piece with “Harley-Davidson” on it positioned within the curve of the exhaust pipe. That cowl, which usually hides the transmission bearings, differs fairly a bit from the quilt on the 117ci engine above that claims “Six Pace.” On the 117ci engine, the mounting bolts are flush with the casing behind the quilt whereas on the 121ci engine, the mounting bolts are recessed. The totally different transmission casing suggests a major change to the gearbox, such because the addition of a reverse gear, maybe.

What different secrets and techniques does Harley-Davidson have in retailer with its new CVOs?

It’s turning into clearer and clearer that Harley-Davidson has important adjustments coming for its 2023 CVO Street Glide and CVO Road Glide, with a few of these adjustments probably carrying over to different non-CVO Milwaukee-Eight fashions for 2024 and past.

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