Hi All, I"m after a bit of advice if you can spare it (i'm still relatively noob-ish, so be gentle 8-[). i've got an 07 vstar650 custom which needed a new back tyre put on to replace the stocker (that lasted 24000k's). i chose a metzeler marathon to match the front which i got about 5000 kms ago. i was keen to see how/if a matched pair would make a difference to the ride. when i got the bike back from the shop i noticed a few things on my way home. -i was feeling vibrations through the pegs and handlebar when decellerating in 3rd or 4th gear from 50 down to 30. -i felt definite 'tingling' vibrations through the pegs when i got up to 70 and was going in a straight line, with no lean. -when leaning the bike to go through light sweeping turns at 70, the vibrations subsided, but sure enough at the end of the turn, straightened up and the vibrations came back again. i checked my tyre pressures when i got home, and again the next morning when cold and found that the shop had underinflated the tyres by about 8 psi (metzelers like psi, apparently!!). i fixed that up and was still getting the problem, admittedly less so. went back to the bike shop and outlined my issues. apparently all 3 guys who worked there had a ride on the bike and they couldn't feel what i was talking about. they took the wheel back off and had a look to make sure nothing was wrong, and made sure they put it back on properly. when i enquired about possibly doing a wheel balance, they flatly refused to do so, swearing blind that it didn't need it (can't remember the exact reasoning they gave unfotunately). i was kind of disappointed that they didn't humour me. i'm no mechanic, but a wheel balance in this situation seems logical... happy to be educated on this one though. after all this, i still have the problem, which i confirmed on my ride home from work today. keep in mind that this issue was definitely not happening with the old rear tyre before it went into the shop (70 kph is the cruising butter zone for this bike). i'm tossing up whether to take it to another bike shop... i'm also going to recheck my tyre pressures before i do anything to make absolutely sure this isn't a factor (i've had a couple of rear flats, so i know what under-inflation feels like). has anyone experienced the same thing as the above situation? i'll kick myself if it's something really simple, like tyre pressures, but at least i'll gain the experience. apologies for the essay, and appreciate it if you've got this far. any advice would be welcome. Cheers, D.