I installed the Rekluse auto clutch today on the 426 with the external perch adjuster. I used the light spring per the instructions and riding it behind the house it feels good. I would like to know what difference the heavy spring would make. I know some of you are using the heavy spring for woods riding. I am also noticing some very slight surging when I stop (very, very light). No big deal as long as it is not going to damage anything. I moved the perch adjuster around to see what would happen and I did not notice anything, is this normal with the light spring? I think that I need to get out and ride as it is very hard to tell anything around the house. I can tell you that I can lock the rear wheel and get right back on it and it performs perfectly, no stalling or hesitation. This this is going to be cool. Any thoughts. Thanks.