dantheman779 Posted August 10, 2009 Posted August 10, 2009 Bought a ZXR750 yesterday,rode bike home (55 miles) but on the way home tonight I opened her up just a little at about 40mph just to pick up to 50 mph and then all of a sudden bang bang bang,noise is engine speed related,no extra vibes,thought it was exhaust manifold blowing so checked with a torch when I got home (10pm) cant see anything obviously wrong,did sound similar to an engine being run with a spark plug missing and is coming from the front of the bike,seems to still idle ok apart from the noise,any ideas,got bike off ebay so I'm a bit stuck,gonna whip the tank off tomorrow so if anyone has any idea what I should be looking for I'd very gratefullCheersDan Quote
Guest Posted August 10, 2009 Posted August 10, 2009 Bought a ZXR750 yesterday,rode bike home (55 miles) but on the way home tonight I opened her up just a little at about 40mph just to pick up to 50 mph and then all of a sudden bang bang bang,noise is engine speed related,no extra vibes,thought it was exhaust manifold blowing so checked with a torch when I got home (10pm) cant see anything obviously wrong,did sound similar to an engine being run with a spark plug missing and is coming from the front of the bike,seems to still idle ok apart from the noise,any ideas,got bike off ebay so I'm a bit stuck,gonna whip the tank off tomorrow so if anyone has any idea what I should be looking for I'd very gratefullCheersDanhave you swapped cans, is it fitted correctly.. blow back... Quote
dantheman779 Posted August 10, 2009 Author Posted August 10, 2009 Bought a ZXR750 yesterday,rode bike home (55 miles) but on the way home tonight I opened her up just a little at about 40mph just to pick up to 50 mph and then all of a sudden bang bang bang,noise is engine speed related,no extra vibes,thought it was exhaust manifold blowing so checked with a torch when I got home (10pm) cant see anything obviously wrong,did sound similar to an engine being run with a spark plug missing and is coming from the front of the bike,seems to still idle ok apart from the noise,any ideas,got bike off ebay so I'm a bit stuck,gonna whip the tank off tomorrow so if anyone has any idea what I should be looking for I'd very gratefullCheersDanhave you swapped cans, is it fitted correctly.. blow back... The rae can was on the bike when I got it and is still on the bike,will put road legal one on in the morning,I really am hoping its something simple but not gonna count my chicken yet,will see in the morning.CheersDan Quote
Guest Posted August 11, 2009 Posted August 11, 2009 fire it up in the daylight and have a look see.. manifold gaskets? Quote
Roadtorque Posted August 11, 2009 Posted August 11, 2009 If it was from a dealer take it back & get them to sort it,,,If it was private deal phone the seller tell them your not happy & your bringing it back,,less than 55 miles & you've got problems,,, I would be wondering what was going to happen next if I kept it Quote
dantheman779 Posted August 11, 2009 Author Posted August 11, 2009 GOOD NEWS,turned out to be spark plug centre that had blown out and on having a closer look seems the plug wasnt overtightened and nothing seems odd other than the plug must have been one that got past NGK's quality control,got the threaded bit out easily enough with a reverse thread thingy,put road can on and all running well,cheers for the suggestions.Dan Quote
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