The G25 doesn't use a real H gate. The shifter is constructed by two vertical plates with cutout zones for gears 1 and 2 (left plate) and 5, 6 and reverse (right plate). The shifter handle sticks in the left or right position by something that can be best described as the head of a screw mounted on both sides of the handle which hooks in the cutout zones. In 3th and 4th gear the handle doesn't hook anywhere. That's why you can move the stick quite a bit to the left and right in 3th or 4th gear but not in the other gears.
While this simple mechanism works for simulating an H-shifter, it has several issues that make it feel quite different from a real shifter with H gate. The most annoying bit is that it's rather easy to get stuck between gears because the cutouts aren't nicely rounded whereas a real H gate has smooth rounded forks - nearly impossible to get stuck on such a fork's tooth.
I wish I made some pictures while I had mine open. One picture says more than a thousand words.
I'm not saying the shifter is bad or not worth the money ("BlakjeKaas" is probably referring to my Dutch review of the G25). I'm using it myself quite intensive, but it's definitely not on par with the rest of the wheel and has a cheapish overall feel. It's a nice add on, but I wouldn't advice anyone to buy the G25 just only to have an H-shifter because it will be a disappointment compared to the rest of the bundle. You should consider the shifter as an extra which can be great fun.
While this simple mechanism works for simulating an H-shifter, it has several issues that make it feel quite different from a real shifter with H gate. The most annoying bit is that it's rather easy to get stuck between gears because the cutouts aren't nicely rounded whereas a real H gate has smooth rounded forks - nearly impossible to get stuck on such a fork's tooth.
I wish I made some pictures while I had mine open. One picture says more than a thousand words.
I'm not saying the shifter is bad or not worth the money ("BlakjeKaas" is probably referring to my Dutch review of the G25). I'm using it myself quite intensive, but it's definitely not on par with the rest of the wheel and has a cheapish overall feel. It's a nice add on, but I wouldn't advice anyone to buy the G25 just only to have an H-shifter because it will be a disappointment compared to the rest of the bundle. You should consider the shifter as an extra which can be great fun.