just to add to all this....i have BT021...front and rear...1000 miles.............not happy with these tyres because i have road noise from the front..loud enough for me not to enjoy riding the bike... will be changing then soon..........probably wear out soon anyway.....

I have the 021's on my FZ1 and they do provide good grip but I have found them:
- very noisy due to the tread pattern. This is caused by the tread pattern resonating noise on the front mudguard/rear hugger. This is a common complaint on all bikes with the 021's
- Track lines/road imperfections making the bike feel a bit twitchy. No loss of grip though just feel odd.
 
I am also a big Bridgestone fan but this tyre has really let them down in my opinion  

I guess the BT021's doesnt claim to be as good as by the manufacturers.
 
I had them on my bike, and initially, the straights were fine, until I hit the corners...
The rear tends to fishtail, even on dry, needless to say when wet...
 
However, I found a way to tackle this fishtailing effect, by having the tires not filled to the full.
It does help abit, but then with my heavy load(I've got a rear box with 2 panniners on a Givi WingRack) at the rear, I do still need to keep constant check on the tire pressures.
 
The only plus point would be the wear. I had the Metz M1 before this, its damn trusty dry or wet, but it doesnt last long as medium-soft compounded.
The BT021s are hard-medium compund, which explains the long lasting wear.
 
However, I shall not be choosing this again when the time comes for replacements...  
 

Quote from gimpmeister on 09. Mar 2010 at 15:20:

 
LoL...
True true... ignorance is bliss and stress free...
Since just near a pair of rubbers on the machine to let it roll...  

I've just replaced 021s with Roadsmarts on my 2005 cb1300s even  though they were only half worn after about 3000 miles. There is something about the tyre which just doesn't feel right. Put them on for a trip to the south of france last year and had no confidence in them when the bike was cranked over. The sensation was a lack of grip and I actually had several small slides on them.Never even had that on a track day with 020s on! Frankly the 020s felt better. It's early days on the Roadsmarts but after scrubbing them in, I did a 170 mile brisk ride thought Kent and into Sussex and back the other day and they felt great. Loads of feel and grip around the lanes. Confidence restored. I know tyres are a very subjective matter and everyone has their own experiences, but I'm convinced the 021s don't suit the CB even though the new, and heavier ,VFR1200 wears them