hey, i have a rmk 900 159' , my clutch wants to stick when its engaged and not desengage witch causes it to kill the motor if i have the brake on,. and when i start it and left worm up and then ready to take off it revs up to like 4 and then boom takes off and then ideals way down read away and dont want to desengage. i have 10 78 weights in it now i had 10 72 when i bought it .. i didnt change the spring tho its black. when i bought the 10 78 weights they said that spring would work .. i just bought the sled two weeks ago. i used to ride ALL skidoo , but rode my rmk and loved it ... but hope i am making a good decsion ..?? i leave for the big horns on the 18th and going to show some skidoos up ..haha i need some help guys .. THANKS ..