Spark Exhaust Konix Evo Racing Full System Side Mount Honda CB650R / CBR650R (2019-2025) GHO8839T

The cheapest of Spark's four systems for the 650R, and the one that gives up the approval to get there. Stainless manifolds, no catalyst, a Konix Evo titanium silencer carried along the side of the motorcycle.

Key Features

• Racing full system for the Honda CB650R and CBR650R.
• AISI 304 stainless manifolds, side-mounted silencer.
• Konix Evo silencer in titanium.
• No catalyst.
• Spark gives 5,7 kg for the GHO8839 kit against 10,7 kg standard.
• Racing part, not approved for road use.

The Racing Version of an Approved Kit

Spark builds the GHO8839 configuration two ways. The approved one keeps a catalyst in the line and carries a homologation. This article is the other: the same side-passage layout and the same Konix Evo silencer, with the catalyst left out.

What that buys is 414 euro against the low-mount approved kit GHO8838TOM, and a system that is unrestricted through its whole length. What it costs is the road registration.

Which of the Four

Spark's range for this motorcycle runs from 1.726 to 2.140 euro and from 3,7 to 6,5 kg, and only one article in it is road legal.

That makes the decision unusually simple. If the motorcycle is registered and stays registered, GHO8838TOM is the only candidate. If it does not, the question becomes weight against silencer shape — and this is the cheapest way in.

Side Passage

Spark describes this layout as recalling the side routing of the more track-focused machines. The silencer runs along the flank rather than tucking low under the engine, which changes the outline of a CB650R more than a silencer swap normally does.

On a CBR650R with the full fairing, it is the more visible of the two positions.

The Konix Evo

The Konix Evo is Spark's newer silencer shape — angular, wedge-sided, with a carbon end cap. Against the round Grid-O used on the other systems for this bike, it is the more contemporary of the two designs.

Both are full titanium. The choice between them on this motorcycle is a matter of shape and of which system layout you want behind it.

What Spark Engineered Into the Range

The development behind these systems went into the collector diameters and the 4-2-1 conic sections, aimed at the mid-range rather than peak power. That work is shared across the four articles; only what comes after the manifolds changes.

Removing the catalyst on this version opens the gas path further. It also makes the motorcycle louder than the approved kit, by a margin Spark does not quantify for the racing versions.

Fitment & Compatibility

Honda CB650R Neo Sports Café and CBR650R, 2019 to 2025. The Euro5 approved low-mount kit is GHO8838TOM. Other racing systems: GHO8840T with a Grid-O silencer at 4,8 kg, GHO8841T with a titanium TIG-welded pipe at 3,7 kg.

Road Approval

None. This is the racing version without a catalyst. Closed course use only — the approved article for this motorcycle is GHO8838TOM.

Specifications

• Part number: GHO8839T
• Type: Full system, racing
• Design: Konix Evo
• Manifolds: AISI 304 stainless steel
• Silencer: titanium, side mounting
• Catalyst: none
• Weight: Spark gives 5,7 kg for the GHO8839 kit (standard system 10,7 kg)
• Road approval: none, racing part
• Fitment: Honda CB650R / CBR650R (2019-2025)
• Manufacturer: Spark Exhaust Technology, Mantova, Italy