can anyone tell me if the front and rear isolastic tube caps are different? They are listed with 2 different part numbers in the parts book Front 060684 and rear 060685. On the bike I am restoring i have 4 tube caps that are all identical? I am having a problem fitting the front isolastic and want to verify everything before I take 2 mm off of the front engine mount. as usual I thank everyone for their insight Thx Drummer99