Well, Dear Brother what i have noticed in Hi-speed is that its engine is very powerful. Just keep it maintained and it will last long. However i am not satisfied with Unique specially during 2011 to 2014 as they are providing low quality and weak engines. They were best during the period 2006 to 2008 and 2009. Before that Jinan was the best bike.
In my opinion chondas were at top in the following order as per quality:
Jinan: Before Unique
Unique: 2005 to 2009
Then Hi-speed 2011 (Best Model)
now lets see who will win the race...
Now a days mechanics were saying this," Either Buy Hi-speed or union Star but built wise Union Star" whereas " Unique to aj kal kachra dey raha hai"... Among Youngsters Super Power is at top now a days and due to cosmetic beauty Super star deluxe.
This is my personal observation and opinion. Anyone can disagree...
One suggestion for anyone who is using Hi-speed... I would recommend him to change front and rear Sprocket to 15,38 and use original chain after adjustment . it will run quite smoothly on long routes and will neither ask you fifth gear (Additional Gear) nor it will vibrate.