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Old 11-12-2012, 04:39 AM   #21 (permalink)
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Odd how different people get different experiences.

I'd get worried if I saw that much valve wear.

Rob
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Old 11-12-2012, 06:51 AM   #22 (permalink)
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Quote:
Originally Posted by williamr View Post
Odd how different people get different experiences.

I'd get worried if I saw that much valve wear.

Rob
It depends on how hard it's ridden. Ride like a grandma and they'll never be out.
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Old 11-13-2012, 04:40 AM   #23 (permalink)
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My thought is that riding past the peak of the power band causes excessive valve seat wear. Or possibly excessive and unnecessary oil changes. That would be an interesting thought to investigate.

Another thought is high start up wear as a result of near total drain down on bikes which aren't used every day.

As the return of the valve is controlled by the springs with no cam interface at impact time, seat impact and any possible slight stretch is not affected by the revs. Higher load forces on the cam silencing ramps at high revs would lead to cam or shim face wear which would open up the clearance rather than close it. Interesting.

Intuitively you expect harder use to lead to higher wear, but I can't see the mechanism for that on the valves. On the bottom end you can see where greater loading on the friction surfaces and bearings increases wear, but on the valve train there's only higher revs, not increased loading, except a slight increase at the lobe/shim interface as a result of the higher revs.

My only experience of Kawasaki as a long term owner was the ER-6 so Kawasakis might wear more than some other brands. Don't flame me for that - it's just a thought. The ER-6 had all the valves in spec when I sold it at about 25K miles. Given the mileage I gave it a full service and put it through an M-o-T for the new owner.

This is going off thread, but it's got me interested.

Rob
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Old 08-27-2013, 06:03 AM   #24 (permalink)
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15,000 mile (24,000km) 2012 Ninja650 service-resized.jpg   15,000 mile (24,000km) 2012 Ninja650 service-dsc_4544-resized.jpg   15,000 mile (24,000km) 2012 Ninja650 service-1071568_573101472729014_260527969_o.jpg   15,000 mile (24,000km) 2012 Ninja650 service-dsc_4545-resized.jpg  

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Old 08-27-2013, 06:07 AM   #25 (permalink)
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Well, what can I say about my bike given that I’ve now hit 45,000km (27,961 Miles) on my 2012 Ninja 650 within 1 year and 8 months... Apart from a few minor issues and the rear shock tabs that failed the bike is still providing me with week end thrills around my favorite twisty roads.
The overall power of the bike has always been a downside for me (having come from larger bikes in the UK) but here in Bangkok 72bhp and a bucket full of low down grunt still manages to give my old mug a smile when the traffic has calmed (11pm+) and my sticky Rosso IIs have warmed up. Some may argue but despite the stock suspension set-up that I have it’s still a perfectly predictable and sure footed ride, inspiring confidence with every outing.
She also commutes as good as any other bike in it’s class, surprisingly nimble through traffic given her dimensions and weight, I find myself regularly leaving smaller scooters behind…. This might be due to my confidence that’s built up over the years but I assure you the bike doesn’t feel as heavy as it’s spec sheet suggests.
My previous write up had a lot of info about my likes, dislikes and ability of the bike and there are plenty of other reviews out there since the bike appeared back in December 2011. I guess the only other thing I should mention is, how much longer will I keep this bike??
Well there are two answers for that question….
A) If I had enough money I would keep it till it dies and use it at my commuter while adding another supersport bike to my stable. Or
B) Sell it and use it as a deposit for something much more desirable, such as a ZX636R at the end of next year… The latter is the most likely option right now.
Either way I wouldn’t hesitate buying or recommending another 650 to other riders who are looking for something they can use every day and throw about at the weekends (With sticky tyres fitted)


Faults

Rear wheel bearing (wear and tear)
Rear Shock
Grove worn into the underside of the fuel tank???
horn
Front brake switch
loose front sprocket (From the factory)
Rear shock’s Upper mount cap fell out somewhere (Replaced with a billet alloy item)
Rear hugger bolt vibrate loose and fell out

Over the past 45,000km

Valve clearances adjusted
5 sets of tyres (Rosso II)
3 sets of brake pads (Stock)
2 stock chain and sprocket sets
Currently still running a RK chain, Renthal front and stock rear (steel) sprocket (all stock sizes)
New clutch (Started slipping at 42,000)
As well as all the other usual service items.


Here’s a pic of how she looks now, pretty sweet for a sports tourer. I’d like to spend more but one must know where to stop when they desire something better.

Enjoy your bikes and stay safe
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15,000 mile (24,000km) 2012 Ninja650 service-1071568_573101472729014_260527969_o.jpg   15,000 mile (24,000km) 2012 Ninja650 service-resized.jpg   15,000 mile (24,000km) 2012 Ninja650 service-dsc_4543-resized.jpg   15,000 mile (24,000km) 2012 Ninja650 service-dsc_4545-resized.jpg  

Last edited by 636karl; 08-27-2013 at 06:09 AM.
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