Quote:
Originally Posted by tharian Had another oveheating incident on my 500 yesterday on a short trip.
Was doing around 90-95 for around 100 kms and the weather was still cool. As soon as the sun was out and the the coolness disappeared, the engine started heating and finally started pinging and loosing power. After riding for around 30 kms with pinging and loss of power , finally stopped to see the rear half of the bike, including the frame and wheel dripping with engine oil.Checked the dipstick and it had no oil on it.
Let the bike cool down for a while and continued in slow speed which did not result in any further issues.
Topped up oil and it drank close to 2 litres! On the return , I kept it at 80 and as the sun went down and the weather turned cool, the engine was back to prime performance.
Realized, I have to reduce my cruising speed and stop frequently if I have to do any trips on this bike.
What I could'nt understand was how 2 litres of oil went missing. Most of the oil was pumped out through the breather , because of the pressure and heat in the crankcase and the rest vaporized? |
I am having the same oil drinking (disappearing) issue but without the overheating or pinking or rear wheel and frame bathed in oil accompaniments.
Yes the chain is glistening wet after a normal 100-200 kms hard ride. But just the normal breather splatters on the rim, a little on tyre sidewalls - no bathing.
I have the same duck-bill breather directly on to the chain as you do.
No black or blue smoke from the exhaust either. No trace of wet oil in the exhaust (loads of soot though).
Off late, I have noticed that the spring-loaded oil filler cap too has lost its tension and does not stay firmly twist locked in place, as well as there is a lt of oil mist all arou nd that area after a hard ride (hard ride for my old lady now means around 100, with some bursts to 110 even 120, but mainly between 90-100).
Also, see some oil below the points cover, and now also a pretty decent leak/ooze from the top right stud of the 4 that join the gearbox to the engine - oil oozing from both between the gearbox and the engine, as well as from behind the gearbox where the stud is bolted. I am guessing this is engine oil and not gearbox grease/oil mix.
There is added oil leak from the inner clutch casing gasket seal (oil on the garage floor on standing overnight), that needs to be looked into, but that is not the engine oil anyways.
Bottom line off late is that, with the oil on the dipstick a cm below max at the start of the ride, by the 125 km mark it is less than midway on the stick, and at the end of 250 odd kms, there is only a hint of oil at the tip of the stick, sometimes not even that. And she takes in about 300-400 ml to get it back to the top mark.
That is more than a mililiter of oil for every kilometer is diappearing somewhere.
Can't be the crank seal because then the bike would smoke. Ditto for valves or rings.
Right now the suspicion is on the breather, the various leaks, and the spring loaded PVC seal below the timing pinion (between the two cams) - which sometimes could be cut/split or fitted upside down (unlikely though).
Bike is running really good though, keeping up with fast LB500s most always except long straights (more because of my right hand than her heart though), and has good strong kick-back compression.
Do keep me updated if you find a cure to your 500's oil disappearing issue man. This one thing is keeping me from both pushing her bindaas as well as taking her for anything longer than the customary sub 500 km rides.
I want to take her to the mountains again, with my friend riding the Duke 200, and I know she can and will and not let me down, but like this I will have to carry a large jerry can of 20W50 with me on the ride! Money is not the issue obviously - its the mental stress of not knowing if you are running dangerously low on oil and thus not being able to enjoy the ride and pull bindaas as before. Not a good feeling.