Project Husqvarna TE610 Part 6: Horsepower and Handlebars
By Dan Barnes
This might be a record among MotoIQ projects for number of articles before engine work to improve performance. The primary reason is that the reliability, comfort and safety benefits of overall vehicle prep were higher priorities. The second reason is that the TE610 makes enough power from the factory to more than get the job done for most riders. It’s not a KLR or XR650L or DR650 – which is why I chose it in the first place.
That said, most TE610 riders do eventually upgrade the silencer and fuel delivery. Because it incorporates a catalytic converter, the stock silencer is big, a bit heavy and leaves some performance on the table without being really quiet. Plus, that cat runs extra hot. The plastic side panel on this bike has melted a little more each ride, and I have slightly melted spots on riding pants where the yellow plastic is mixed with the blue of the cloth.
There are about a dozen exhaust options if you search the web long enough, but I needed a US Forest Service listed spark arrestor. I chose the Leo Vince “enduro” slip-on, the most popular choice among SM610 and TE610 riders. Leo Vince exhaust upgrades for the Husqvarna 610 siblings include simple slip-ons tuned for enduro or motocross/supermoto performance and sound characteristics, as well as a complete titanium system including the pipes up to the cylinder head.
|The Leo Vince silencer is shorter and lighter than the stock TE610 silencer. Exhaust gases aren’t heated by a catalytic converter and they discharge downward, farther forward than with the stock unit. The signature carbon fiber hangers allow a single silencer tube shape to be mounted on many different bikes.
|The Leo Vince silencer can be assembled in several configurations by selecting the appropriate insert. “Street” setups (top) have a tube that turns down and ends just past flush with the silencer end cap. The spark arrestor setups (middle) stop at the end cap plate so they can be used with the screen, which catches and cools any bits of incandescent carbon that might be released by the engine.
|This is the view down the silencer with the end cap removed. The “quiet” inserts (left in the previous photo) plug into the single tube at the top of this photo. In that case, the exhaust gases travel down the main tube, into the rear chamber (closest to the camera), back through the two lower tubes into another chamber, and finally enter the discharge tube of the insert. They can also enter the discharge tube directly from the first chamber through the drilled holes. The “loud” inserts are just a straight tube pointed at the main tube, but not connecting. Most gases will flow straight into the discharge tube, but some, and quite a bit of sound energy, will bounce around the two chambers.