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The other night my rear end slipped out pretty bad felt like I was riding my old xr80 dirt bike, luckily I was able to ride it out. My tires are fairly new Pilot Powers, rear wheels is straight with no play. This has happened two times before not as severe though. I was hitting the turn at around 30-40mph with moderate lean. I don't know maybe I am just hitting oil every time it just seems weird cause it only seems to happen on right hand turns. Any ideas?

wat air pressure are you running?  were the tires warm?  how new is fairly new?  how was your body position, throttle control, and brake application?  have you adjusted the suspension to fit your weight?  did u run over any paint, manholes, or other debris on the road?  are u completely positive that the rear tire was actually sliding?

plenty of things to check here, but most likely this is not a bike problem.  its a rider problem

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Naked 93' F2...... RIP -- 04/12/07
04' 600RR Black - currently stuck between track and street usage
- Brembo Master, Sato's, & Ohlins out back

Tire is at 40 cold, the first few times tires were fairly cold.body position was leaning into turn. Tires have around 2000 miles. Throttle was little aggressive. No brakes, have not adjusted suspension to fit weight(have not had this problem before). I am positive the backend was sliding. I hope it is my problem =). Well at lunch today I was cruising around and it was fine. IDK maybe im just crazy or hit some oil. 

cold tires w/ high cold pressures = easy sliding.  first off, its gonna take u quite a bit of miles to get tires warm enough to stick.  if ure just cruising around town, theyll never be warm.  also, u running 40psi is making it worse.  for aggressive riding, esp w/ mid-turn throttle application, i suggest u run a maximum of 35psi cold.  this will improve grip a bit and should make the bike more compliant at lean. 

however, this of course is not the sole reason for the tire sliding.  the rear end stepping out is def a very large combination of factors, most of them coming from your input on the bike.. ie body position, weight application, throttle control, and bar input.  i guess im jus saying u should do everything possible to prevent that tire from sliding. 

if u can find someone to adjust your suspension properly (not just a buddy that thinks he knows wat hes doing) or want to read up on it for about an hr then attempt it yourself, the bike will handle better.  but like i said, this isnt the root of the problem.  honestly, the best way to understand what and why the bike is doing what its doing is to ride more. 

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Naked 93' F2...... RIP -- 04/12/07
04' 600RR Black - currently stuck between track and street usage
- Brembo Master, Sato's, & Ohlins out back

I never make fast turns at intersections unless I know this itnersection and I can clearly see whats on the road.  Usually all intersections have a bunch of sand and small debree on them.  Even a very fine layer of sand that you can barely see or a few pebbles will result in a slide (or at least a side step).  There are many other factors too.  For instance if you were lubing your chain and the lube flew off and went on your tire walls = slide.  You just went over a puddle and got some water on your rubber = slide.  Tires were on the painted lines = slide.  Tires went over bumpy surface = slide.
The difference between dirt and street bikes is that our sport machines are build for pretty much perfect tarmac.

Fulcrum:

I never make fast turns at intersections unless I know this itnersection and I can clearly see whats on the road.  Usually all intersections have a bunch of sand and small debree on them.  Even a very fine layer of sand that you can barely see or a few pebbles will result in a slide (or at least a side step).  There are many other factors too.  For instance if you were lubing your chain and the lube flew off and went on your tire walls = slide.  You just went over a puddle and got some water on your rubber = slide.  Tires were on the painted lines = slide.  Tires went over bumpy surface = slide.
The difference between dirt and street bikes is that our sport machines are build for pretty much perfect tarmac.

oh man, ive done that one.  chain was clean and lubed, brand new tires, new front end, new clip-ons, new shock... and i made it 50ft before hitting the ground.

all these reasons are y we ride much much much slower on the street... compared to the track that is.

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Naked 93' F2...... RIP -- 04/12/07
04' 600RR Black - currently stuck between track and street usage
- Brembo Master, Sato's, & Ohlins out back

Thanks for the help all =)

I would like to add a little sugestion to this, find a realy smooth  slick peice of asphalt  and add a bucket of sudsey water to it. Ride through it and play the thottle a little. Get used to the feel of sliping. Not because its cool or any thing, but because its a fact of life.  Being somewhat comfortable with sliping will keep you from panicing when it does happen.  Im not saying get crazy with it, just get used to the feel of it and regaining control calmly for when it does slip. 

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CBR929-jardine race can, down 1, polished frame and swing arm,wheels polished, HELI bars, Sargent seat, Puig racing screen

commuting on a VLX600 shadow for now, 60MPG!!! I punched out the baffles, so it has that V-twin snap and crackle that made H/D so infamous. Except this little scute is rice powered!!lol

Totally agree here.  I was just taking the "clover leaf" onramp today at pretty good speed/lean agle.  I noticed a wet streak from the sprinkler runoff across my path .  I quickly decellerated and reduced my lean as much as possible before going over it.  Still i felt my bike get kinda squirmy and side step a foot or so.  I would have probably freaked out if it was my early days.

The one thing that really caught my attention--your tire pressure at 40.  Sounds really high to me.  I run 34 front, 36 rear, for street riding.

Also, it is hard to imagine Pilot Powers slipping in the conditions you describe.  I just think, Sand on the pavement?  A light sprinkling of sand might not be visible.