KTM Superduke 990R - New Tyres and Sprocket Carrier Bearings

Four years too late...

The old Superduke of Bridgey's has been somewhat neglected lately. And when I say lately, just the last four years or so. It's still pretty clean, don't get me wrong, but legend has it Boudicea was using the same tyres on her chariots. 

Now I wouldn't have bothered putting up this post for a pair of new Pirelli Rosso II's but, what was concerning, was the state of the sprocket carrier bearings. Well, one in particular.

The Superduke has some great engineering plusses, one of which is the two bearings fitted to the sprocket carrier. Four bearings in all to let the wheel spin in the manner to which it's become accustomed. Imagine the rigidity, the ability to keep that wheel inline no matter what angles it's trying to put down the power.

As much as I like to take the piss, it's a bloody good idea.

But during a routine tyre change, it became obvious that all was not well in the bearing department, and the sprocket carrier was extremely notchy. The two spacers that go in from both sides were rusty and I wondered if the water had been held in there and got past the seals.

The two spacers on the piece of wood need to be knocked out first. Then the bearings can be hit out, one from each side taking note of the small spacer in between.

A closer look at the bearings with seals removed showed the carnage. The cage had broken up and it came to a premature end. The cause? Possibly overtightened chain at some stage.

After a good clean-up, two new bearings were fitted and everything was good again. A good reminder to always turn the bearings by hand whenever you take the wheels out, any notchiness and it's time for replacement. 

If you're very careful when removing the seals with a pick, you may be able to clean them out and regrease them, as long as they are smooth and quiet, but for the cost of new bearings, it is advisable to replace them when in doubt.

Anyway, it's certainly nice to see the old girl back out and fighting fit.

Balancing Motorcycle Wheels At Home.

Getting Balance In My Life.
Because I fit my own tyres, I knocked up a contraption to balance wheels ages ago, but it involved a couple of lengths of wood which needed to be supported high enough to get a wheel off the ground. All this took up space and was a pain to set up, even if it did the job ok.

What I wanted was the nifty little self-standing static balancer I'd seen online. A quick perusal of eBay had one snapped up and delivered for less than seventy of the finest Aussie dollars. And, what's more, it arrived two days later! In Australia that's pretty much unheard of.

Just a quick look at the box and you can already feel the quality can't you? 

"This twin purpose wheel balancing stand and stand..." I'm lost. And "twin purpose" means? Well, according to the destructions, either a biker or motorcyclist can use it. 

Alright, sarcasm over, let's have a little decko and see if it actually works.

Pirelli Diablo Rosso 2 Review

I want new tyres for every ride!
With about 150 km's on the new boots, I'm impressed. The bike feels like its awesome self again. It's probably the same thing we always feel when new tyres are fitted, but today I'm happy!

Pirelli Diablo Rosso 2

Tyres don't seem to need running in anymore.
Back in the nineties, the magazines warned you everywhere "Take it steady for the first hundred miles as the oil in the rubber is forced to the surface."
Hmm, whatever's going on in there nowadays doesn't seem to matter because these babies just work from the off. Knee down no problem ten minutes from the shop. Of course, it's always in the back of your mind that you'll slip on the first bend, but not once did they cause any grief.

Michelin Pilot Road 3 Review

Good enough for fast road?
Considering Michelin themselves don't recommend these for a sports bike, they did pretty well - 7,500 km's well in fact.


Yet again, the sides have worn out well before the centres, testament to the harder compound in the middle, but to get that sort of mileage from a GSXR1000 is outstanding!

Pilot Road 3 looking unused in the middle.

Can it hold it's own against stickier alternatives?
In all honesty, I'd put it down to the rider. A few blasts with some quick riders has proved how good they are. Only occasionally spinning up the rear out of a bend, it's incredible how much grip is at hand. The front is much more rounded than modern sports tyres (Power Pure looks almost pointed), and shows in its mellow lean speed. This left me with less confidence - a feeling that got worse the more they wore. 

They can be hustled, but maybe not in the same way as the Power Pures fitted before.

Fast sweeping bends tended to leave me uneasy on a rough road surface - something I'd not noticed so much with previous tyres. The front always gave that vague feeling when tipped right over at high speed. But it's not a sports tyre, was never described as such so the only geezer to blame is me!

GSXR1000K6 with Pilot Road 3's fitted.

And what do you expect from something that lasts nearly twice as long? They don't look as good as an all out sports tyre. in fact they're pretty ugly, but  easily capable of all the knee down fun, stoppies and wheelies you can handle. 


So do the sums and take your choice. If you're quick, and ride a full-on race rep, you'd probably be better off with a sticky, almost smooth, sports tyre. But if you're touring, commuting, and like the odd fast section, then these things are perfect and will last ages!


Would I use them again?
It's time for a change. I don't like the tread pattern and want something slightly more sports orientated. Three of us need tyres at the moment so we're all going to give the Pirelli Diablo Rosso 2's a shot this weekend. 
Again, they're twin compound, but smooth outer edges which should help combat the scalloping effect - the result of rebound problems when leant right over? 
Having just read a review on Visordown, a new ZX10R using the 3's on a race track had exactly the same issue. The grooves are wide and probably not matched well with stiff suspension, leaving you with a smooth, rounded trailing edge and an untouched leading edge. Shame because there was plenty of life left in other parts of the tyre.

Look at the sides and see how the trailing edge is worn down, and the leading edge is sharp.

Time to lay down another $400!
This is going to be a cool test. Three bikes - CBR600R, R6 and my Gixer 1000 - all to be fitted with the same tyres on the same day. No excuses, last to wear them out buys a brew!