Bought this for my 1990 Zephyr 550. I wasn't confident that it would have much of an effect, or that I would like whatever effect it did have, but after reading just about every T-rev review on Webike (almost all of which are four or five stars) and checking out some of the cool trev videos on YouTube, I took a chance. Result: I couldn't be happier. I'm not sure how best to describe the effect except to say that my bike rides much smoother now. It's more "civilized." Smoother idle, shifting and deceleration. Imagine you had a passenger and you were trying your best to make her ride as comfortable as possible. You'd be gentle with the shifting, maybe feathering the clutch to ease the transitions. That's what this feels like - a gentler ride without having to expend the mental energy of babying all the transitions. The best part is at highway speeds. Say you've got the throttle wide open. Normally when you release the throttle you'd feel a sharp deceleration. With this thing, the bike just keeps going smoothly. Less herky jerky stop-go. More flow.Some fellow riders suggested just buying a cheap PCV or check valve instead. I don't think that would work. As I understand it, the t-rev consists of reed valves that open and close with each piston movement, thousands of times per minute. I don't think PCV valves operate on the same timescales - they're either open or closed (or maybe open a varying amount according to engine speed, but not opening and closing with each cycle). There are a few downsides. For Zephyrs and GPZ's, this installs in the airbox, so it's a bit of pain to put in (have to remove the tank). And you can't see it, which is a shame because it's a nice looking piece of kit. I'm also wondering if it has a negative effect on airflow, though I haven't noticed any decline in performance (If anything, my bike seems more responsive). Another drawback is that these require maintenance - cleaning every 10K km and overhaul at 20K km ($50USD for an overhaul kit). And lastly, the price is ridiculous. That said, I think it's worth the money and am very happy with my purchase.
View Detail
Looks like you access from European region.
Would you shop at webike.eu.com?
