Question about Honda Motorcycles
This type of problem is hard to diagnose without hearing the actual sound in person, but it's possible you're hearing the oil pump chain.
Does it sound like the rattling is coming from the front, bottom of the engine?
There is a chain under the clutch basket that drives the oil pump. Over time, the chain stretches and gets loose, requiring replacement. It goes without saying that failure of this chain will cause catastrophic damage to your engine, so it should be checked if it sounds like it's on its way out.
Here is a link to info on accessing the oil pump chain on an ST1100:
Posted on Oct 19, 2013
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Posted on Jan 02, 2017
SOURCE: rattles at low reves only
THE RATTLING YOU HEAR AT LOW R'S IS MORE THAN LIKELY THE CAM CHAIN RATTLING. THE CHAIN TENSIONER IS ADJUSTABLE TO A DEGREE BUT A BIKE OF THIS AGE(IF OVER SAY 10000 MILES) MAY NEED A NEW CHAIN TO ALLEVIATE THIS PROBLEM. LOOSE CHAIN CAN CAUSE CAM TIMING TO VARIATE CAUSING A SLIGHT MISFIRE.
THIS MISFIRE COULD ALSO BE THE RESULT OF DIRTY CARBS. IF SO THEY WILL NEED CLEANING AND SYNCING.
Posted on Oct 22, 2009
hi,most bigbore v-twins have a knocking sound coming from the bottom end,it is usually caused by the tolerance in the big end bearings and normal wear and tear,however in saying that,if the noise is a very metallic type knock,get it checked out straight away,it is quite difficult to diagnose a knock without seeing or hearing the bike running,but if in doubt,get it checked over by a reputable motorcycle mechanic,it will be inexpensive to get it checked over and find nothing wrong,but could be very expensive if their is something wrong..cheers
Posted on Dec 31, 2009
THE SOUND YOU HEAR IS A STRETCHED CAM CHAIN THEY HAVE SELF ADJUSTING CAM CHAIN TENSIONERS ITS TIME TO REPLACE YOUR CAM CHAIN YOU DONT WANT IT TO SKIP A TOOTH AND TAKE OUT YOUR PISTON AND VALVES POSSIBLY MORE
Posted on Jan 29, 2010
http://www.clymer.com/Book.aspx?bid=902&title=Clymer+Honda+ST1100/Pan+European+1990-2002 This is what I would get....they give step by step directions to take the entire bike apart.
Posted on Feb 15, 2010
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