What is the 400 engine good for before it goes kaput ?

Seen some high milers advertised at a reasonable price.

No problems that I know of, After 2007 K7 models put better quality oil in it.

I suppose it depends on the type of life the bike has had and how frequently it was maintained with oil and filter changes. 56k plus is not unusual.

Fatboy, it's bullet proof so don't worry. Mileage is not too important. These engine can go easily over 100,000 miles before needing any real spannering. Evidence of that is out there and I have serviced one with 78,000 miles on it and it ran sweet as a nut. As the guys are saying, just make sure it's been serviced regularly. As with all engines, that's the key to long engine life. Make sure in particular that the valve clearances have been maintained as many owners who diy will deliberately overlook doing that very important check believing they don't ever alter and that it's a difficult thing to do. It's not and it's vital to make that check and adjust if required! Get the latest model you can afford as the 2010 onward bikes have the latest gearing and engine mods, They rev a bit higher too.

Data, is there any way of telling the latest model i.e. model number, vin number , month of manufacture? I ask, as I will be looking myself for a new (to me) bike in the next couple of months and am aware a bike can have, say a 2010 registration but be the previous year's model.
Thanks,
Tone

Yes, just take a look at the tacho. If you want the latest spec then just make sure the tacho has the redline at 8950rpm instead of the earlier models 8500rpm. It means it has the lastest everything, including the new piston and top ring design which allows it to rev flutter free at high rpm. It also has the lower rear final drive gearing which lightens the load on the clutch. ECU carries a slightly different map too from what I can see. This model came in around late 2009 but go for 2010 if you can. They are pretty cheap to get hold of with low miles.

That's just what I needed to know, many thanks!
Tone

Thanx for a lot of valuable info.
I was looking at 2007 for the slight engine increase and leg room with an extra stopper over earlier carb ones
I was not aware that the 2010 on is better or the givaway rev limit on the rev counter.

Great stuff

Steve

Good tip Data

If it is an ad and you can't see the dials the 10th digit if the frame number is the model year.

The description should also show the model year as K9 or L0 or whatever
Letter is the decade. Number is the year

I found on my bike, a L1, 2011model, on a recent run out it went into the red on the tacho, 9000rpm at a shown 105 on the speedo, could maybe do with slightly lower(or higher) gearing perhaps. Its got 4000miles on the clock so drive belt shoudnt be worn much yet.