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Got a set for my project bike a 12 front 48 rear on my xrx125 and it has made a lot of difference to the way the bike rides, it's not a gear setup I got for top speed I wanted more acceleration so went with a 12/48 set up now the bike not only holds it's top speed but I am able to go up hills or against head winds without changing down a gear, I can even accelerate up hills and change up gears that a normal 125 would struggle with.
Apart from the way it helps the bike run, the look of the new setup is so much better than the stock setup.
I can't say how long it will last as only done a couple hundred miles, so far it looks good.
It's a simple upgrade that's worth the money
I've added this upgrade onto my bike it's perfect only thing I found was that the front sprocket was a little loose even with the washer.
I'm hearing some noise but unsure if it's the upgrade so I can hear the chain go more now if if there's a problem.
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Admin Reply: Thanks for your feedback, glad you love it like others do!💎 - If your font sprocket has a rattle, please investigate your drive shaft itself, we don't know if your own previous sprocket splines caused any issues to it etc, remember the original OEM sprocket from Hyosung is made in China, another owner made his bike chain adjustment too tight and he lost his engine shaft, so it was a mess! (his own fault) but the original sprocket was badly worn even inside the spline teeth connecting to the front engine shaft , so double check your setup! Remember to check chain slack and keep it lubed well!
Installed on RC 2018. The crem de la crem of spark plugs. Engine smooth, power on demand has improved, acceleration unbelievable and a clean start. Worth the money, combine with the NGK caps for optimum performance.
Matt