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September 4th, 2010, 08:14 AM   #1
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What to change in the motor at 140 hours

I'm about to tear my FE 450 -08 apart and replace some bearings. There's nothin wrong with the bike but the hours is running away.

Now to my question:
I'm planing to replace crankchaft bearing, balancer shaft bearing, timing valve bearing, timing chain, tensioner and the rings and gaskets. Is there anything I should do that I've forgotten or whatever!?! Give me tips and trix...

/ Cpt. Redbeard
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September 4th, 2010, 08:53 AM   #2
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Re: What to change in the motor at 140 hours

At 140 hrs. I would check valve adjustment and timing chain stretch. Nothing else unless there was metal fragments in the oil filter or screens.
If it ain't broke, don't fix it!!
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September 4th, 2010, 12:12 PM   #3
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Re: What to change in the motor at 140 hours

Originally Posted by berger
At 140 hrs. I would check valve adjustment and timing chain stretch. Nothing else unless there was metal fragments in the oil filter or screens.
If it ain't broke, don't fix it!!
+1
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September 4th, 2010, 02:23 PM   #4
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Re: What to change in the motor at 140 hours

Yes the cam followers, and the valve springs.

Seems to me that you are into your engine a bit early, except for the cam followers. But if you have been riding it hard then only you would know.

If you are splitting the cases you will be getting a gasket set of course. Be sure and change the clutch side crank seal if it does not come with the kit.

The stock valve springs are known for a couple of things, one is that there is a lot of pre tension on the valves thus causing the cam follower wear. Some folks go with the dual valve spring kit, contact Taffy about them, I believe the are Kibble/White if I am not mistaken. Taffy has been putting these in for some time, and save a lot of wear on the whole valve train.

While you have the head off, you might as well do a valve job on it too. From what I have read/heard, the five angle cut job is the best.
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September 4th, 2010, 02:29 PM   #5
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Re: What to change in the motor at 140 hours

Originally Posted by The_Force
Originally Posted by berger
At 140 hrs. I would check valve adjustment and timing chain stretch. Nothing else unless there was metal fragments in the oil filter or screens.
If it ain't broke, don't fix it!!
+1
+1 for me

My 04 450 now has 200+ hours, still doesnt use oil, still goes very hard. It is actually in my 08 450 frame after the 08 engine broke in style. (valve adjuster nut was overtorqued by previous owner $1700 repair). I replaced my timing chain at 150 hours.

There are 450 people on here with some VERY HIGH hours with no or very little work at all.
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September 4th, 2010, 04:16 PM   #6
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Re: What to change in the motor at 140 hours

I've now turned over 200 hrs and almost 8,000 kms on the 650 with a cam chain and DVSK at about 160 hrs. All good. My 501 still has the original bottom end at 33,000 kms.

Unless you've worked it really hard, don't change the oil, or have a known problem, I reckon that 140 hrs is premature for a bottom end.

Steve
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September 4th, 2010, 08:34 PM   #7
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Re: What to change in the motor at 140 hours

Okey!

Maybe it's we from sweden who's a bit hysteric about hours and replacing stuff.
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September 4th, 2010, 08:52 PM   #8
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Re: What to change in the motor at 140 hours

Originally Posted by rozzer
Okey!

Maybe it's we from sweden who's a bit hysteric about hours and replacing stuff.
There is nothing wrong with that but we are just pointing out that i might be a little to early to go all the way down to the bottom end this early if there are no signs of problem. Nothing wrong to take of the clutch cover and open the head and have a look.

check the compression, replace cam chain, cam followers and valve springs.
Get the dual valve springs from taffy, the original conical ones are prone to breaking.

But If you have been revving it to the moon and riding it hard then it might be a good idea to have a look at the bottom end specially the big end.

Hilmar
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September 24th, 2010, 06:10 AM   #9
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Re: What to change in the motor at 140 hours

Sorry for interrupting ,but what about the valve springs of 2001-2003 engines, though are those also weak and may brake? and can't fit the Taffy's dual springs to 2003 engine any way ?
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September 24th, 2010, 10:29 AM   #10
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Re: What to change in the motor at 140 hours

Just pm taffy he is a member here.

Regards
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