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Do you have any photos of the damaged parts?

Something is going on that has been missed. I'm not positive that the oiled filter would cause the ECU to lean the mixture, but it could. The plug would tell you something about the mixture and the damaged valve may also have some clues.
 

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I had them replaced brand new after the exhaust side burnt from hubby lugging the engine...Toasted spark plug diagnosed that one.
Lugging the engine won't harm the valves. My bike has 30,000 miles on it. 6,000 miles riding through town at rpms of less than 4,000. It seems like the exhaust valve clearance got tight and burned from improper adjustment. And then the repair was also botched since they sent the head out for a "valve job" rather than replacing the head and all of the valves.
 

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Discussion Starter #103
Lugging the engine won't harm the valves. My bike has 30,000 miles on it. 6,000 miles riding through town at rpms of less than 4,000. It seems like the exhaust valve clearance got tight and burned from improper adjustment. And then the repair was also botched since they sent the head out for a "valve job" rather than replacing the head and all of the valves.
Yes lugging. He was taking turns without downshifting to 2nd gear and lugging the engine. Accelerating from 5mph in 3rd gear lugging sometimes going uphill giving it more gas to try to get it to go instead of downshifting. You are describing low rpm normal use. Which I did without issue for 10,000 miles. Damage by lugging is definitely rare because most people recognize that the sound is NOT normal and adjust. My husband just isn't that aware. The spark plug was toast in a way my tech had never seen before which verified that cause. That one is confirmed and that time all parts were replaced brand new. He tried to replace them again this time but insurance was going to total the bike so he used a machine shop instead.
 

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Discussion Starter #104
Do you have any photos of the damaged parts?

Something is going on that has been missed. I'm not positive that the oiled filter would cause the ECU to lean the mixture, but it could. The plug would tell you something about the mixture and the damaged valve may also have some clues.
He took one photo of the burnt valves to send to insurance but he had to have it machined this time to prevent insurance from totaling the bike. I don't have possession of the photo. I'll ask.
 

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someone should show hubby - the clutch lever -
and its mate - the throttle - and its mate
the tacho, which likes to point 'up'..

your motorcycle, is a very expensive
very well designed - tool -
which should or must be
used, not abused..

if hubby was banging on your $4000
violin, rather than gently bowing it,
would you let him continue abusing
your violin or perhaps, take it from him,
to explain and demonstrate and require
not-banging-it, as a prerequisite to
attempting to play the thing..

perhaps someone less directly involved,
another motorcyclist say [?] could help
in correcting this demonstrated fault..
 

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He may have more skills than all of us. Third gear at 5MPH without a stall takes madd skillz. :p
 

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as an advocate of specific practice and use of
very slow riding, below walking pace, feet up,
and of not using brakes for slowing
when normal engine braking is sufficient,
i acknowledge the skills in slow riding..

however,, there must be an element of control..
we have a clutch, and 6 speed gearbos as
integral parts of our engine and drivetrain..

clutch fully in or fully out is like on or off..
wrong gear for loading creates stress
thru engine, clutch, gearbox and
drivetrain thru to rear wheel..

when the engine shudders under load
this is unnatural stress forcing itself
out of the system, after the fact..
ie, it isnt free and will cause
damage before, overload..

anyway, this is just an observation
based on the ladies statements..
point being possible involvement of
another motorcyclist [instructor perhaps]
rather than between wife and errant hubby..
[he may not be open to her corrections etc]

part of the pleasure of riding a motorcycle imo
is in ease of control designed into especially
our modern motorcycles,, based on the same
proven basic technology and riding skills..

working with, your machine, is the essence..
everything should be, smooth, easy,
and potentially pleasurable..

beyond the bundle of parts,,
there is - her pleasure -
 

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Discussion Starter #108
Yep. I wish we had a standard car for me to teach him how to drive one but unfortunately we didn't so he learned on the bike. He wouldn't listen to me (I think he has that disease where women's voices, when it comes to instructions, are silent) but he was able to change his ways when tech told him. He is a very passive thinker. Even when driving. He is careful but being defensive is impossible for him as was figuring out when to downshift. After all, for the first 30 years of his driving career he just hit the gas :( We're looking into getting him a car.
 

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cbrl - wouldnt worry mate,, looked like a humourous aside
to me, but, others incl novices, could read it as written..

cmoretti - burned in habits can be resistant to change,,
having 'proven themselves right' for 30yrs..

this could include who such habits
may listen to,, as new/better knowing..

seeing damaged engine parts is direct
input which may open his mind to
learning or modifying his riding
habits, esp if/when a tech person
of suchlike makes the point..

i taught a family friend to drive in one session
of only a couple of hours, after her hubby
gave up after months of trying..
his expectations and methods were like
a cabinetmaker with a new apprentice,,
as he had been,, with the element of
who's the boss and in control,
the dominant factor..
sounds like that may be [in reverse]
your situation.. or he may just be
a lost cause in terms of riding skills..

there are lots of resources around today
from riding courses to motorcycle clubs
to internet how to videos..
who knows, he might turn out to be
another mike hailwood, if the penny drops..

there is a point [imo] when your own life
must take priority,, including relative to
being a motorcyclist, the enjoyment
of that.. life is indeed short,,
the pleasures are to be enjoyed
as part of life itself..

good luck...
 

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Does anyone have an engine coolant temperature sensor for the CBR250R's engine. If possible, could you post an image in this thread, or a link to the image? It would be most appreciated.
 

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i have seen a same case of burnt valve ,, the owner was known about the radiator fan which was not working , even though he kept riding and resulted in burnt and bent valves ,most of those are outlet valves which goes burnt, his cbr had an aftermarket two brothers exhaust as aftermarket exhaust creates more heat in engine and radiator fan was not working it means the heat damaged the valves.
 
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