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November 3rd, 2014, 07:41 PM   #11
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Well then, how are we getting on now with the hours/miles/kays?
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December 15th, 2014, 11:48 PM   #12
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My 12 fe 570 has just rolled over 500 hours and 31000 ks. No work has been done. No joke the valve clearances are still in spec. has has loads of oil changes and has not really been given a hard time. I use it for adventure riding. cheers
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December 16th, 2014, 01:33 AM   #13
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wow +500 hours that's insane I am rebuilding mine with 233 hours and the piston/cylinder still looked like new only the rings are a little worn but still in spec and could do a lot more hours...
Mine is a supermoto and I ride at WOT often + do a lot of wheely's I don't even know if the wheely's make a difference for the engine on these bikes they seem to handle the abuse just fine
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December 16th, 2014, 01:39 AM   #14
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Should I replace valve springs on mine or wait for next rebuild at +- 500hours...
I do'nt want to waste money on things I don't need
The previous generation bergs I heard story's of valve springs breaking after long use but never with these 70 bikes....
Not that it's that expensive to replace but saves me some time to not having to dissasemble the head re adjusting valve clearance etc...

Grtz
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December 16th, 2014, 02:43 AM   #15
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Really good question ... I haven't heard of a failed spring either. Peace of mind is invaluable though. Can the springs be measured for wear in the head? Estimated and guessed at? And have them stay put for a season or so unless they look back at you funny?
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December 16th, 2014, 01:40 PM   #16
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I have a 3000 k ride in feb. Might pull it down afterwards and have a look. if it all looks good i will just put a set of rings and a new counter shaft in it. That has a little bit of wear on it. They look really cheap, but of course a little more time involved. Cheers
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December 17th, 2014, 12:35 AM   #17
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I've rebuilt one or two of these now and they have for some reason had some that had big end failure. completely against the run of play as you might say!

If I was stripping a motor just to check it and all looked great, the only thing I would change if it wasn't the pistone complete would be the rings.

just the rings.

on the older bikes up to 2008, if the rings went soft they would start to bounce just before TDC and BDC causing ripples in the wall of the liner. there's no record of that but then all you high mileage lads ARE MAKING the records!

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December 17th, 2014, 03:55 AM   #18
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Guess I just leave the head be than... Just clean some black stuff of it and install slightly bigger shims for my valve clearance
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December 17th, 2014, 04:40 AM   #19
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then why rebuild it? today's detergent oils mean that there is very little carbon build up and what there is - on the piston - is often seen a as desirable nowadays.

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Taffy
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December 17th, 2014, 04:55 AM   #20
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Just to be sure everything inside still is good...
Some people do'nt even get to 200 hours without engine faillure.
Guess it al depends on use/maintnance/oil quality/riding gently when engine is not up to temp and a little bit of luck etc...
But now I will know how much the engine wears when I rdie it because I did 99% of the miles on the bike so I can see what service interval I can use in the future depending on how much wear there is on all individual parts...
The crank bearings will be replaced and connecting rod/timing chain...
In a few weeks I will see what else if the engine is completely into pieces
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