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Excellent review, now I have to go out and buy them! I appreciated you breaking down the (areas of), weight savings. Cool to know the turn-in feels quicker. What rubber are you running?
 

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Discussion Starter #3
Right now, I'm running the new Pirelli Supercorsa TD tire that they just rolled out. When I'm done with them, I've got a set of partially used Michelin Power RS tires to put back on and run to the wear bars.
 

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Thanks Evans. Great read and lots of info.

Finding good, detailed info and trustworthy reviews online is not easy. It always helps to have a good source :nerd:
 

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I mean, I disagree that a rider at your level of skill is able to notice the weight effect on roads, I'm just not having it that it's anything more than a placebo effect and you wanting to notice.

Whilst I accept it's rotational and unsprung weight, I don't think anyone outside of top class racers could notice.

I went from stock discs to wave without noticing that's for sure.

My buddy also rode mine on track back to back with his stock 790, no difference in either bike. He's proper quick.
 

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You have good points. My notes in the review are the result less of feel and more of noting the side effect of slight oversteering initially until my body adapted. This occurred on a road I’ve been riding regularly since 1990. Oversteering at corner entry once is a mistake, several corners in a row is a trend. It was while thinking about this over a cup of coffee at the midway point of the ride that I decided that the issue was related to muscle memory and the lessened rotating mass.

I’m human. So, you’re right, there could be some placebo effect, but I believe that the symptoms I noted (which are now gone) were the result of the discs. Otherwise, I wouldn’t have put it in the review.

Thanks for calling me out. It’s made me think about what I published and how it could’ve been better. That’s always a good thing.
 

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EvansB2 a brave and honest answer well done. I was watching with interest as Weeksy had made a valid challenge.
 

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I would venture to assume that three (3!) lbs of rotating mass off the front wheel is significant enough to affect steering and can be felt by an experienced rider, riding two bikes back to back or on a road he/she is very familiar with.

The steering input points, effort and resulting lines (either under or over steer) are easily felt. I think attributing all of it to a placebo effect may be a mistake.

Riders who ride for a long time can get pretty in tune with the machines they are riding and can easily feel changes to the machine's behavior. It might be intentional mods, as well as things that go wrong, mechanical changes, strange noises, etc. Steering effort change is one of more easily felt, as far as my experience goes.

When making a change, I am always going to a road I am familiar with, riding at a similar pace and trying to feel how what I changed affected the bikes behavior. In most cases I can feel a difference. In some cases more than in others.
 

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I would venture to assume that three (3!) lbs of rotating mass off the front wheel is significant enough to affect steering and can be felt by an experienced rider, riding two bikes back to back or on a road he/she is very familiar with.

The steering input points, effort and resulting lines (either under or over steer) are easily felt. I think attributing all of it to a placebo effect may be a mistake.

Riders who ride for a long time can get pretty in tune with the machines they are riding and can easily feel changes to the machine's behavior. It might be intentional mods, as well as things that go wrong, mechanical changes, strange noises, etc. Steering effort change is one of more easily felt, as far as my experience goes.

When making a change, I am always going to a road I am familiar with, riding at a similar pace and trying to feel how what I changed affected the bikes behavior. In most cases I can feel a difference. In some cases more than in others.
Mmmm maybe, but this is a track both me and my mate have done 1000 laps of, we had 3 of our 790s there and his had been slightly tuned in the engine along with us running slightly different preload. His had Bendix m7 pads and stock disks, mine was wave disks and SBS street excel pads, neither of us felt any difference.

I don't doubt Evans has ridden a lot but I'm not exactly a novice with having owned 50+ bikes and done 100+ trackdays and 3 seasons of racing back in the day.

I wasn't intending to be disrespectful of him, I just completely disagree.
 

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No offense taken at all. I have no problem with you disagreeing with me. It comes with the job, and it forces me to more deeply consider my opinions in reviews. Only good can come from that.

We’ll have to agree to disagree on this topic as I stand by my initial assessment.
 

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Mmmm maybe, but this is a track both me and my mate have done 1000 laps of, we had 3 of our 790s there and his had been slightly tuned in the engine along with us running slightly different preload. His had Bendix m7 pads and stock disks, mine was wave disks and SBS street excel pads, neither of us felt any difference.

I don't doubt Evans has ridden a lot but I'm not exactly a novice with having owned 50+ bikes and done 100+ trackdays and 3 seasons of racing back in the day.

I wasn't intending to be disrespectful of him, I just completely disagree.
I don't think your post came through as being disrespectful. But I also not sure these things are 100% contradicting. You are right to point out that some changes really require pushing a bike closer to its limits in order to actually feel a difference. In addition, it is much more difficult to estimate the effects of multiple changes at once than of a single change at a time. This is why every suspension tuner will tell you to make one change at a time, test/estimate its effect on handling and continue to the next change.

We all know that there are some riders (at all levels of racing) that are considered as great testing & development riders, even if they are not the fastest or the best riders at their perspective level. These guys are known for the ability to understand and isolate the results of a change on the bikes behavior better than others. Some very fast MotoGP riders will admit that they are not capable of significantly helping in development, because they just don't have what it takes, in this very specific regard.

I am very sensitive to changes and sometimes even have problems connecting to a bike if I don't like its "feel". I had a friend (yes, had) who would jump on a bike and will be immediately extremely fast. Much, much faster than me. If you would ask him what he likes or dislike on the bike, he wouldn't be able to tell you.

So this is not just a theoretical discussion. It is meant to say that we all ride and connect to our motorcycles in different ways. There are no rights or wrongs. This is what makes motorcycling so magical and enables us to share stories discuss and to politely argue, endlessly. I rarely meet a fellow biker that i cannot spend a few hours with, discussion motorcycles and motorcycling.

So cheers, brother. See you on the twisties!
 

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Thanks for your review and everyone's input.

All good and helpful info, just what I have been looking for. :smile:
 

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Just installed the wave discs along with a set of EBC HH pads and the increase in braking performance is quite significant. I didn't buy the rear wave disc. I installed the rotor and pads at the same time so I can't tell which made the most difference but I know combined, they are a heck of an upgrade over stock. Much less effort is needed at the lever. Love the feel of the brakes now.

I weighed both sets of rotors with a luggage scale I had laying around. I got 8.3 lbs (pair) front rotors and 5.0 lbs (pair) for the wave discs. Can't say I feel the weight difference while riding. Feels like it flicks left and right a little quicker but I chalk it up to the placebo effect. Wheelies should be around 3lbs easier ;)

Was thinking about a Brembo MC and possibly calipers in the future but I'll wait until they come on my 890 :)
 

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I considered the 320mm upgrade myself before I bought the 300mm rotors. Eventually came to the conclusion that if Chris Fillmore could set a record at Pikes Peak with the regular wave discs, they're probably good enough for me :)
 

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I considered the 320mm upgrade myself before I bought the 300mm rotors. Eventually came to the conclusion that if Chris Fillmore could set a record at Pikes Peak with the regular wave discs, they're probably good enough for me :)

Hoo yaaa..!
 
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