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General Maintenance, Servicing, and Mechanical / Re: Bike won't fire
« Last post by Stvlas on Today at 02:07:07 PM »
By the way Art,
The CBF-F had accumulated 96k km.......  and always got serviced on time. Valves were done by myself 15k km ago 👍😊
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General Maintenance, Servicing, and Mechanical / Re: Bike won't fire
« Last post by Stvlas on Today at 02:01:33 PM »
Thanks Art,
You are also a very knowledgable guy too...... I have not got the expertise or facilities to investigate or verify either of your diagnosis.  Either way,  it strongly looked like an engine strip down of the top end.  Fixable yes.... but not by me,  and expert time, labour and tools cost dearly.  Was sad to see the CBF-F go,  but I'm also delighted with the NC750X.  Serviced correctly and regularly,  I've seen evidence of NC's doing North of 250k km. 
You may like to check out mototuning.ie.  If they don't know what they are at,  then I don't know who does?
Value your thoughts as always Art.  The Internet would be a barren place without helpful people such as yourself 👍👍😊
Stay Safe man.....
Niall...
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General Maintenance, Servicing, and Mechanical / Re: Bike won't fire
« Last post by Art on Today at 11:38:38 AM »
 :084:

If I was a gambling man I'd wager either this 'mototuning guy' has misdiagnosed the problem or you've misunderstood what he's told you. Carbon build up is mostly a thing of the past and is unlikely to occur in a modern engine, run on modern fuels, with regular engine oil and filter changes whether that engine be a CBF, a CBR or a Ford Fiesta it matters not, carbon build up is mostly a thing of the past. That's not to say it can't occur, it's just so very unlikely and can't be diagnosed by a simple compression test alone. Also I'd have expected a competent mechanic to have inspected the combustion chambers using an endoscope before jumping in with a recommendation for an engine rebuild.

For my two penneth and the benefit of our readers there are three prime suspects to cause low compression, these are valve clearances out of specification, worn or broken piston rings or a failed cylinder head gasket. Of course there are other causes but these three are the prime suspects. It's simple enough to eliminate or prove the head gasket by examination of the engine oil, coolant and in situ inspection of the head gasket seal. Piston rings and valves can be eliminated or proven by following up a dry compression test with a wet compression test, this is where 10-15 ml of engine oil is added to each cylinder before the compression test and should be carried out before any stripping down of the engine. If the compression doesn't improve by adding oil suspect the valves and a top end strip down will be needed to determine the exact fault. If compression does improve with the added oil suspect the piston rings or cylinder bores and a full engine rebuild may be on the cards.
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Lighting, Electrical, and Wiring / Re: New cbf arriving
« Last post by Rev Ken on Yesterday at 09:23:01 PM »
The only reason some owners get obsessed with stator failures is that the rest of the bike is irritatingly reliable for manyyyyyy miles. Many bikes NEVER have any trouble, a very few seem to have more than their fair share of charging problems. The later model (black engine) have a revised oil supply which makes failures even rarer. Just enjoy!
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General Maintenance, Servicing, and Mechanical / Re: Bike won't fire
« Last post by Stvlas on Yesterday at 08:55:10 PM »
Well problem was found on mine. Requires an engine Rebuild!!!!😲😲😲
The mototuning guy I bought the bike to knows these Fireblade engines inside out.  He used to be a race mechanic at Mondello Race Track here in Ireland. He came across this only once before in a CBR1000.  The owner in question used it as his daily commute, never putting the engine under much strain and neither did I on my CBF-F.
Here-in lies the potential danger.  By being a careful but also brisk rider, I seem to have killed the bike with kindness!!!!  He advised me that these engines need to be regularly cained and riden in the higher revs occasionally. This clears its throat and more importantly carbon deposits that build up on the pistons and and around the valve seats.  When he done a compression test, 3 of the cylinders were way down on values, caused most likely by the carbon jamming the valves thus requiring the top end to be completely stripped down, new valve seals, pistons and rings cleaned etc.......nightmare.  I cut my losses and part-xed it for an NC750X (2017).  A right decision for me.  The NC really suits my style of riding and is fantastic on fuel.  If this helps anyone then great. Was too late for me.  He did say though that if fuel additives had been used regularly while the engine was running, it may have prevented the fouling.
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New Members / Re: CBF Newbie
« Last post by Longside on Yesterday at 08:36:47 PM »
Hi and welcome,  :152:
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Lighting, Electrical, and Wiring / Re: New cbf arriving
« Last post by iNCORRIGIBLE on Yesterday at 11:20:48 AM »
Hi & welcome Electric 1000. Probably not totally sane but some of us carry a spare Stator on tours.Wally of Southminster :001:
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Lighting, Electrical, and Wiring / Re: New cbf arriving
« Last post by Art on Yesterday at 11:08:56 AM »
Your welcome these machines are good for intergalactic mileages, especially if you do your own servicing. That way you know the jobs been done properly with no corner cutting such as you get with dealers.
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Lighting, Electrical, and Wiring / Re: New cbf arriving
« Last post by Electric1000 on Yesterday at 08:39:53 AM »
Thanks very much for the reply.. I feel a little bit more relaxed now I am picking the bike up in a week or so and my main concern after reading all the horror stories on here was reliability.. the last thing I want is to be stranded in a tour.. I will check the voltage on the day I get her..again thanks just hoping with 9k on the clock there’s plenty of life left in it
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New Members / Re: CBF Newbie
« Last post by Art on Yesterday at 07:57:24 AM »
 :405:

What you have there is a SC58 CBF1000 A-7 an excellent and under rated choice in the sports tourer class.
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