Here is my Hyosung:
All I can say is I absolutely love it, comfy to ride good mileage and reliable everyone complements it! look after and it will serve you well.
Please don't believe the crap people slate it with usually "you'll never find parts" or "itl rust in a month" just look after it
I often get asked speed wise it isn't out special average really, my jets are way too high at the moment (stock 87.5 and 90 mine are 102.5 and 105 :O!) but its mainly down to me being constantly at work and not able to sort it

the stock exhaust is pitiful at best and I was almost knocked off at least 5 times due to nobody hearing me at all and there incompetence to look in their mirrors but the blueflame sorted that.
If your looking at one and it has stock shinkos on it I urge you to replace them straight away there absolutely **** mate I went with some continentals they did cost me a bit though
I get
around 200 miles to a full tank which works out
about 75mpg a full tank costs me about 16 quid at current prices this is pretty average for them really have a look on fuelly at them the Pandp one is probably one of the most modded ones on the owners club im sure his is an 05 he got a bit less than me iirc.
The HN bike or whatever it is your looking at id stay well clear from while I was picking my bike up after getting my tyres done I was greeted by someone who had a Lexmoto Vixen (looks almost exactly the same as the HN) and he'd had pretty much everything replaced and a complete new bike the second time he had issues and the second bike (that he had when I was there) was an absolute wreck the mechanic who's garage I was at told him to get out he didn't want it back it was that bad as he was talking to me lol
Think what you want though there still even though they have been going a while an unknown area I suppose but I gave it a chance and don't regret it, its upto you at the end of the day
