Mate,originally got the info from Mark at MH Racing the first time I went there a few years ago......He was saying that 42 rear is just putting money in the tyre manufactures pockets......
So I started running my rear at 38.....Then about a year or so ago,my bike was in Crescent for something or other and I asked them what they thought and they said 36 front and rear.......So down came the rear to 36........Wouldn't run it any other way now mate......Even 38 in the rear makes a huge difference to mine,thats why I run 38 two up,can really feel the change!
Give it ago,see what you think.......You will defo get more milage out of the rear for starters!
GB.
