Odd sound???

steve95 · 03-30-2008, 01:07 PM

I hope someone can shed some light on this problem, take some of the stress away
my vfr750 fj when cruising/accelerating/decelerating, makes a sound like a loose tappet??, now i tested this by riding at 30-40mph, killing the engine, with the clutch in or out makes the same sound?? (coasting)so i know its not engine.
And the sound is gear dependant ie if i leave it 3rd, no engine running and clutch in, it makes a fairly slow sort of loose tappet sound (but a little deeper sound, not so tinny), and with the clutch in and no engine, go down a gear and the sound speeds up? it does this in any gear, in neutral, the sound dies away and stops, only happens when in gear/ engine/no engine/clutch/no clutch. Now i can only sumise that it is a gearbox prob, the input shaft as it alters with gear selection, and stops in neutral. is there any components connected to the input shaft, oil pump/water pump that could make this sound?, is definatly does not sound like a knackered bearing, its a regular dull tapping sound. You can hear it as well by leaning the bike on its stand, drop in gear (not running) clutch out and rotating the back wheel so it turns the gearbox. any help much appreciated as im hoping its not a gearbox fault (the bike has only covered 40,000 miles with 4 prev elderly owners) and something else, any ideas anyone? thanks in advance
Regards Steve

elf800 · 03-30-2008, 04:12 PM

sounds odd

squirrelman · 04-06-2008, 10:30 PM

If the chain was ever adjusted way too tight then the output shaft outer bearing ( just in back of the front sprocket) could be damaged.......

Lgn001 · 04-06-2008, 11:46 PM

This thread is a repeat...

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03-30-2008, 01:07 PM	#1 (permalink)
steve95 Junior Member Join Date: Jul 2007 Last Online: 12-31-2008 12:30 PM Location: uk My Ride: rc24 II `88 nc13 fII `86 cb125 tdc yam rs125dx cb200 Posts: 17 Thanks: 0 Thanked 0 Times in 0 Posts	Odd sound??? I hope someone can shed some light on this problem, take some of the stress away my vfr750 fj when cruising/accelerating/decelerating, makes a sound like a loose tappet??, now i tested this by riding at 30-40mph, killing the engine, with the clutch in or out makes the same sound?? (coasting)so i know its not engine. And the sound is gear dependant ie if i leave it 3rd, no engine running and clutch in, it makes a fairly slow sort of loose tappet sound (but a little deeper sound, not so tinny), and with the clutch in and no engine, go down a gear and the sound speeds up? it does this in any gear, in neutral, the sound dies away and stops, only happens when in gear/ engine/no engine/clutch/no clutch. Now i can only sumise that it is a gearbox prob, the input shaft as it alters with gear selection, and stops in neutral. is there any components connected to the input shaft, oil pump/water pump that could make this sound?, is definatly does not sound like a knackered bearing, its a regular dull tapping sound. You can hear it as well by leaning the bike on its stand, drop in gear (not running) clutch out and rotating the back wheel so it turns the gearbox. any help much appreciated as im hoping its not a gearbox fault (the bike has only covered 40,000 miles with 4 prev elderly owners) and something else, any ideas anyone? thanks in advance Regards Steve

04-06-2008, 10:30 PM	#3 (permalink)
squirrelman Senior Member Join Date: Jul 2006 Last Online: Today 03:29 PM Location: barf-a-load, ny - Find Me! My Ride: '86 VFR 700Fs (3)/ '97 VFR 750F/ '88 NT 650 HAWK (3)/ '86 Yamaha Radian/ '66 Yamaha YL-1/ '88 VTR 250 (2)/ '73 CB 125 View my Photo Gallery Posts: 973 Thanks: 7 Thanked 36 Times in 36 Posts	If the chain was ever adjusted way too tight then the output shaft outer bearing ( just in back of the front sprocket) could be damaged....... __________________ " Goin' to Hell in a bucket, but at least I'm enjoyin' the ride....... " "It's no use, mate, the bottom's fallen out......."

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03-30-2008, 04:12 PM	#2 (permalink)
elf800 Banned Join Date: Feb 2008 Last Online: 10-27-2008 09:50 AM Location: dallas My Ride: 2007 rwb leo vince slips kn filter only mods Posts: 446 Thanks: 0 Thanked 5 Times in 3 Posts	sounds odd

04-06-2008, 11:46 PM	#4 (permalink)
Lgn001 Most Royal Deluxe Member Join Date: Nov 2007 Last Online: Today 06:40 PM Location: Russian River by Ocean, CA My Ride: 1983 CB1100F 2000 SV650 2007 VFR View my Photo Gallery Posts: 1,009 Thanks: 20 Thanked 50 Times in 41 Posts	This thread is a repeat...