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russ777 |
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russ777 L Plate Warrior
Joined: 10 Apr 2019 Karma :
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doggone |
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doggone World Chat Champion
Joined: 20 May 2004 Karma :
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Posted: 09:10 - 10 Apr 2019 Post subject: |
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You can cause damage by extreme over-filling, but since you had it running it's probably OK.
I suspect goof up by incompetence rather than trying to hide a rattle or something.
A bike I sold to a neighbour, freshly serviced he decided needed topping up and thought you were supposed to hill to the rim of the filler cap. It wouldn't even turn over on the starter.
The strange idling behaviour could be an air leak or could just need carbs balancing which is something that gets 'overlooked'. |
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Robby |
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Robby Dirty Old Man
Joined: 16 May 2002 Karma :
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Posted: 10:38 - 10 Apr 2019 Post subject: |
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Well it clearly needs a proper going-over. If the oil was overfilled and the brake banjos leaking, it suggests it was put together very quickly just before a booked MOT.
For the oil, I doubt that was to mask anything. More likely the previous owner forgot the drain the old oil before adding the new, and then didn't check if afterwards. It chucked some of the excess into the airbox, so you know the crankcase breather is working. I wouldn't expect any lasting damage.
Brake banjos could be leaking because the bolts were loose, or because the copper washers were re-used. I would fit some new copper washers and torque them up properly. Also possible that some of the washers are missing, if it was all done in a rush.
The revs returning slowly could be a number of things, but I would be looking for an air leak. 3 places to look, in order of difficulty:
1. Carb balancing ports. If the caps have been left off, you get an air leak.
2. Inlet rubbers loose, cracked, missing O-rings. Inspect and fix.
3. Throttle shaft seals. I don't know if this a problem on the XJ550, it was on the 650 with Hitachi carbs. The throttle shaft seals harden and wear with age, allowing the carbs to suck in air. Eliminate the other possibilities first, because this would a more involved job where you have to separate and dismantle the carbs, followed by a carb balance. |
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A100man |
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A100man World Chat Champion
Joined: 19 Aug 2013 Karma :
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russ777 |
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russ777 L Plate Warrior
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A100man |
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A100man World Chat Champion
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Old Thread Alert!
The last post was made 5 years, 17 days ago. Instead of replying here, would creating a new thread be more useful? |
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