Kriss
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| posted on 23/2/09 at 09:52 AM |
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BEC Neutral Rattle (advice/help)
Words of advice please.
Went for a brilliant drive on valentines day morning for a good few hours in and around kent and surrey. Car didn't miss a beat. I loved it.
Got the car out Saturday to give it a wash and a general once over. Then I noticed.
With the car in 1st gear (BEC R1), I parked up on the driveway (slight slope) clutch down I knocked it into Neutral, lifted off the clutch pedal and a
rather loud rattle came from the engine side. Press the clutch and it would go, off the clutch it would come back.
Took her for a quick spin yesterday and it seemed OK, but I dont want to do any more damage if something is up. Checked the oil gallery with the car
switched off and the oil filled up 60-70% of the window.
I am going to perform my first oil change in the next few days (Castrol T4 10w40) and a Champion oil filter (dont you love Staff trade cards at
Halfords when your buddy owns a store!) Where on the oil gallery window should I fill to, and then how much should I over fill?
Could an oil change (as it may be too low now) cure my problem or will it require a bit more work>?
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BenB
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| posted on 23/2/09 at 10:02 AM |
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I'd try jacking up the back of the car and put it in first and start the engine and see if you get the same rattle with the clutch up when in
gear (you could do this on the road but you'll get road noise which might mask the rattling). If you do then it's worth having a shoofty
at the clutch. Could be something like a broken clutch spring rattling when decompressed. If it's only in neutral then it could be something
like a selector fork rattling around.
Of course it could be totally unconnected and be something really silly like a loose bolt on the clutch cable connector rattling when not under
strain.....
Worth trying to find out where it's coming from.....
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BenB
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| posted on 23/2/09 at 10:05 AM |
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That being said some engines do that as standard.... though you probably would have noticed before....
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handyandy
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| posted on 23/2/09 at 10:12 AM |
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i,m not a bike mechanic ( ex bike racer ) but sounds to me like it may be as already suggested, ie clutch spring or even a clutch basket prob but in
my opinion if its only happening when in neutral i,d first look at the clutch spring bolt tensions then dig deeper,
& maybe only its just a loose bolt / bracket in the clutch line .
hth.
andy
ps . good idea to raise rear of car & listen closely as put into a drive gear.
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Hellfire
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| posted on 23/2/09 at 10:13 AM |
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quote:
Originally posted by BenB
That being said some engines do that as standard.... though you probably would have noticed before....
I was about to say that but the 2006 R1 seems to be the worst offender for this problem.
Steve
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Kriss
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| posted on 23/2/09 at 10:15 AM |
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Will raise the rear and see what happens I guess and take it from there.
**Is it cool to just trolley jack the rear using the diff and put into drive or should I axel stand too? If so where?
Could it be an idead to remove the clutch basket case after the oil has drained and take a look?
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handyandy
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| posted on 23/2/09 at 10:22 AM |
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if it was me raising the car i,d be happier if axle stands were used & also chock the front wheels.
also yes i would be taking a look at clutch basket area, & even if problem is not found there at least you,ve had chance to check clutch
condition, clutch plates / basket etc.
good luck, hope its something simple tho.
cheers
andy
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smart51
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| posted on 23/2/09 at 10:49 AM |
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My BEC is noisier in neutral at a stand still than with the clutch pressed (in any gear or in neutral). With the clutch engages, the gears and clutch
are all turning. With the clutch pressed, the gears and half the clutch are still. It is not exactly loud but it is noticable.
Rear wheels in the air and trying different gears will show whether it is a neutral only problem. You have to listen out for prop, diff and wheel
hub noises when in gear though.
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gixermark
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| posted on 23/2/09 at 11:33 AM |
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not related to your problem.. but i'd run more oil than that personally...
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nstrug
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| posted on 23/2/09 at 11:37 AM |
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The R1 5PW clutch (not sure about earlier/later models) has a large wire circlip before the last clutch/friction plate pair (the larger 135mm clutch
plates). This is supposedly to reduce noise, but it usually disintegrates, causing rattles and possible engine damage.
If you take the clutch pack out, and it's not there, you might want to drop the sump and pick out all the bits of circlip - they will have been
lunched by the gears probably.
You can run the clutch perfectly safely without the circlip in place.
Nick
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r1_pete
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| posted on 23/2/09 at 11:56 AM |
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My R1 does this, when hot, if I lean the bike right in neutral the rattle gets worse, leaning left quietens it.
I suspect its the plates moving slightly in the basket, and when immersed in oil the noise is damped.
It doesn't happen in gear due to the dragging of the plates, similarly with the clutch pulled.
It has done it from new as far as I can remember.
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Kriss
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| posted on 23/2/09 at 12:01 PM |
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Thanks again guys, i will be sure to take a look, and try and work out how to take the clutch pack out and check for the circlip.
I will also findout at the same time if I drop the sump to see if MR Darby did fit a sump baffle as promised when building my car. (The guy is good at
promising and not delivering lol)
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Dangle_kt
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| posted on 23/2/09 at 02:11 PM |
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Your findings will make interesting reading I bet!
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Hellfire
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| posted on 23/2/09 at 03:55 PM |
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Yeah - good luck buddy!
Steve
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Coose
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| posted on 25/2/09 at 06:00 AM |
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I think you're possibly panicing over nothing - it may just be that your carbs/throttle bodies are out of balance. This then causes chattering
of the clutch basket when there is no load, which sounds bad but it's not - it just means that the primary gears and gearbox cause noise due to
backlash when there's no load. It won't do any damage but sounds dreadful!
The first thing to check is the balancing of the carbs/throttle bodies (do a search on here - there's loads of info about balancing), then start
worrying about the clutch. I wouldn't touch the clutch until you've done this.
Oh, and I'd probably be running significantly more oil than that. If it's an '03 or earlier, the level wants to be at the top of the
window at tickover.
Spin 'er off Well...
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Kriss
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| posted on 25/2/09 at 03:25 PM |
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My oil gallery clears when on tick over, so that would that suggest I need a heck of a lot more oil? What level should I fill it to on my oil change
then?
Its a Fi '03 5PW
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Hellfire
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| posted on 25/2/09 at 05:44 PM |
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Like Coose says, just fill it till the level is at the top of the window on tickover.
Phil
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Kriss
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| posted on 28/2/09 at 04:51 PM |
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My Megabusa buddy came over and thinks i was panicing over nothing.
did a oil and filter change, plus a lot more oil going in as to what came out as it was about a ltr under all seems better than ever.
cheers all for your help and u2u's advising on oil level and over filling
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