The Scooter Republic from South Wales have recently launched their own Vespa GTS ‘Odyssey’ exhaust system. It’s a highly-polished stainless steel can and link pipe with the option of road legal, or the choice to remove two different decibel killers for a bit more noise. It comes with the peace of mind you get with an established manufacturer (TSR make and sell lots of classic and modern scooter parts) and it’s a fair bit cheaper than most other aftermarket exhausts so we thought it had to be worth a try.
We received one a couple of weeks ago and fitted it to our long term GTS SuperTech. Here’s how we got on…
Straight out of the box I was impressed with the look and feel of the Odyssey. It’s a much more compact silencer than the usual array of aftermarket exhausts. The stainless exhaust is very well polished to a chrome-like finish, as is the link pipe. The welds all look good and the two-point mounting bracket is pre-fitted so there’s not much to work out before fitting.
What’s in the box?
The exhaust also comes with two longer bolts (not shown) to replace the standard exhaust fixing bolts, two springs and an exhaust gasket. We’ll come to that later.
There’s not much to it really, simply remove the old exhaust (leaving the manifold/header pipe in place), fit the gasket to the top of the pipe, slide it over the header and fit the two new longer replacement exhaust bolts. Once in place. Tighten everything up from back to front and fit the two springs. It should take about 15-20 minutes. The Odyssey lined up perfectly and fitted very easily, no messing about or fettling required.
If you’re fitting an exhaust to an existing header pipe always loosen that off first so your new exhaust (or the manifold) isn’t under strain. An exhaust under strain will eventually crack.
Fitting video and sound
With the exhaust fitted with both decibel killers, it’s quiet, not too meaty but with a slightly deeper tone than the standard exhaust. If you remove the rear DB killer (one allen bolt to remove) it gets a lot meatier but not offensively loud. Remove the front DB killer and it’s louder still, leave that one out and refit the rear decibel killer and it’s a compromise between the two. It gives you options to tailor the sound to what you prefer. You can see the exhaust being fitted and listen to how it sounds in the video above.
With 4-stroke pipes you don’t generally notice much of an improvement in performance and there are no claims for a HP hike with the Odyssey. We put the SuperTech on a Dyno though recently, the standard exhaust made 19.86bhp and with the Odyssey the scooter made 20.05bhp – a minor gain of 0.19bhp. On the road, it pulls well enough though and still hits the rev limiter easily enough on our long term SuperTech so it certainly hasn’t stifled the power.
On the road
I fitted this exhaust the day before a 280-mile round trip so it gave me a good chance to use it on the road. I did half the trip with it as it comes, both DB killers in place. It’s quieter like that than a Remus or Scorpion but a little noisier than standard. With the rear DB killer out it was a bit too loud for my liking but with just the front DB killer taken out it sounds like an aftermarket exhaust but without popping and farting, so it doesn’t draw unnecessary attention. This is my preferred way of using the Odyssey.
I like the way the Odyssey link pipe has been designed, it kinks upwards around the water pump and gives plenty of room around the oil filter and drain plug. Wildcat Scooters suggested that aspect of the design. As far as I know, that makes it the only GTS exhaust that allows you to drain the oil and replace the oil filter without removing the exhaust. At least that means you aren’t having to disturb the exhaust gasket. If and when you do need to change the gasket, The Scooter Republic manufacture their own so it costs just £6.89, less than half the price of a Piaggio one. It’s well worth having one in your glovebox as a spare if you use either an Odyssey or standard exhaust. I’m not really sure of TSR’s reasons for designing a gasket in really (other aftermarket exhausts don’t use them) but Piaggio did it as well so there must be a reason?
The actual silencer itself is much less bulky than any of the other aftermarket exhausts, this gives it plenty of clearance around the bottom side panel so it won’t melt or damage anything. Overall I like this exhaust quite a lot. It seems well thought out, well made, has a couple of clever features and isn’t expensive when compared to the mainstream brands. It looks good fitted and the sound can be fine-tuned in four different ways – standard, rear DB killer out, front and rear DB killers out, front DB killer out, rear in. Well worth a try if you want to get rid of the rusty, heavy standard exhaust.
Price and availability
The exhausts are available now for Vespa GTS 125/250/300 (not for iGet 125) direct online from our shop. The exhaust costs just £279.99.
The TSR Odyssey joins our other GTS exhausts in the SLUK Shop