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TECHNICAL MOTOBRICK WRENCHING In Remembrance of Inge K. => The Motobrick Workshop => Topic started by: andrej_gr on September 14, 2018, 09:03:58 PM
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G'day everyone.
I've read that this is a common thing for older K's to smoke for a while after being left on a side stand for longer time. However my bike is '95 and just want to double check if I'm having the same issue.
So I haven't ridden the bike much since I bought it, cause was busy stripping it down, rewiring etc. Today I started it first time after over a month. It was sitting on the side stand all the time. Starts flawlessly, but white smoke starts coming out after ~20s. Here is video when idling, smokes more when throttling: https://www.youtube.com/edit?o=U&video_id=JbWcltPksu4
Light smoke also keeps coming for some time after stopping. And it also comes from somewhere underneath the bike (hole in exhaust?): https://www.youtube.com/edit?o=U&video_id=NTknaVkCaAw
Only rode it a few hundreds meters today and turned back.
Any thoughts? Or is it the same "leaving on side stand for a while" issue and it will clean up after a proper ride?
Cheers
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I guessing it's just the old sidestand insect fogger. The oil is probably between the oil control and the compression rings and takes a bit of running to work it's way into the cylinder where it is turned into smoke. Sometimes takes a minute or two to burn it all off.
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Smoke'm if ya got'm!
I think it would do it some good to run a few gallons of fuel though the old rig.
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I revived my 1985 k75 about four years ago - on first start up the clouds of exhaust were impressive. After talking to a few K bike riders I learnt not to leave the bike on the side stand - when I park up I put the bike onto the centre stand and then kill the motor. When I leave I start up on the centre stand etc.... there is a great reduction in the cloud of smoke. (the other option is to make a quick getaway!) The engine configuration is famous for oil seeping past the piston rings but I am sure others more knowledgeable can tell you more about that.
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I had a '88 LT ( brown fudge-cycle ) that smoked when it felt like it no matter what I tried. I took more than my fair share of ribbing from the Harley crowd. It would quit smoking after 3 or 4 minutes of running. I just got used to it.
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I revived my 1985 k75 about four years ago - on first start up the clouds of exhaust were impressive. After talking to a few K bike riders I learnt not to leave the bike on the side stand - when I park up I put the bike onto the centre stand and then kill the motor. When I leave I start up on the centre stand etc.... there is a great reduction in the cloud of smoke. (the other option is to make a quick getaway!) The engine configuration is famous for oil seeping past the piston rings but I am sure others more knowledgeable can tell you more about that.
this.
leave it on the center stand....
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So took it for a longer spin and the smoke was gone in a few kms. Thanks everyone!
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Was at the bike shop, when I started the K and had coughs of smoke that prompted a quick exit. Embarrassed that I looked like an Africa Corps tank billowing a smoke screen across a battlefield, things got worse when the traffic light turned red! Still spewing residual clouds of smoke, a car pulled up in the lane next to me, the driver laughing and yelled out "It's a bitch, all bricks smoke. Use your center stand." I just shook my head and laughed.
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Did the bike sit idle before you got it? How long? It's possible the rings are stuck. They were in my K100RS. I dumped a bottle of Marvel Mystery Oil in the crankcase and the new owner reports that after about 1,000 miles both smoking and oil consumption have been drastically reduced.