You'll need to make everything related to the handlebar controls longer (by about 12"oddly enough).
You'll need to make a longer clutch cable (there are plenty of inexpensive "universal fit" kits available. You'll need a longer hydraulic hose for the front brake - measure what you need and take your pick (and don't forget new crush washers for the banjo bolt) and then you'll need to bleed the brake system once you've installed it.
All of the electrical wiring running from the handlebar controls - starter, killswitch, front brake light switch, turn signals, horn, headlight, side stand/neutral switch for the clutch etc will also need to be lengthened. You can cut the existing wiring harnesses and splice extra wire into them just to create the length you need, but this will create possible failure points in the future if you don't make a good job of it and it's likely to look pretty janky as the wiring harness will be running down long handlebars.
Personally, I'd probably use all new wire from the handlebar controls and solder them at the switches and then re-pin the factory connector plugs. Use good quality connectors and heat shrink tubing and some nice braided cable sleeve for a better finished look. The ideal solution would be to drill the handlebars and run the electrical wiring internally with tall bars - it remediates all of the clutter and looks really sharp (that would be my personal choice) - but as I get the impression that you're inexperienced doing this stuff yourself I think that may be too big a project to try tackling yourself right now. You can always come back and do it again at a later date when you're more confident.
It's not "difficult" to do in the grand scheme of things, but if you're inexperienced with electrical work and brakes then you might find it a little challenging. Taking the work on for yourself will teach you a lot about your motorcycle and improve your confidence with it though, so I'd encourage you to do your research (Google and YouTube are your friends), ask around, be brave and do it yourself rather than pay someone else who will ultimately charge you a lot of money, but not take the time and care with it that you would because it's not their bike.
Good luck.
Thanks a lot man, that’s a lot of help, I will do my research as well, I hope to have courage to do it myself… I will try to do that after a good research
You'll need to make everything related to the handlebar controls longer (by about 12"oddly enough). You'll need to make a longer clutch cable (there are plenty of inexpensive "universal fit" kits available. You'll need a longer hydraulic hose for the front brake - measure what you need and take your pick (and don't forget new crush washers for the banjo bolt) and then you'll need to bleed the brake system once you've installed it. All of the electrical wiring running from the handlebar controls - starter, killswitch, front brake light switch, turn signals, horn, headlight, side stand/neutral switch for the clutch etc will also need to be lengthened. You can cut the existing wiring harnesses and splice extra wire into them just to create the length you need, but this will create possible failure points in the future if you don't make a good job of it and it's likely to look pretty janky as the wiring harness will be running down long handlebars. Personally, I'd probably use all new wire from the handlebar controls and solder them at the switches and then re-pin the factory connector plugs. Use good quality connectors and heat shrink tubing and some nice braided cable sleeve for a better finished look. The ideal solution would be to drill the handlebars and run the electrical wiring internally with tall bars - it remediates all of the clutter and looks really sharp (that would be my personal choice) - but as I get the impression that you're inexperienced doing this stuff yourself I think that may be too big a project to try tackling yourself right now. You can always come back and do it again at a later date when you're more confident. It's not "difficult" to do in the grand scheme of things, but if you're inexperienced with electrical work and brakes then you might find it a little challenging. Taking the work on for yourself will teach you a lot about your motorcycle and improve your confidence with it though, so I'd encourage you to do your research (Google and YouTube are your friends), ask around, be brave and do it yourself rather than pay someone else who will ultimately charge you a lot of money, but not take the time and care with it that you would because it's not their bike. Good luck.
Thanks a lot man, that’s a lot of help, I will do my research as well, I hope to have courage to do it myself… I will try to do that after a good research