Petermts90 Posted November 28, 2016 Share Posted November 28, 2016 Good morning all,I am new to the world of forums and am seeking some advice. I picked up a non running Honda CLR Cityfly 125 1999 for £400 with 33k on the clock. It is in great condition and after simply adjusting the throttle screw and playing about with the carb, the engine now runs. The carb was spotless inside and when I changed the oil, there was no grit or particles to make me believe there is anything sinister wrong with the moving parts in the engine. There is a high end tapping noise coming from the cylinder head and I think a valve adjustment will fix this??Here is a video of the bike running, let me know what you guys think : https://youtu.be/oPkSuDPyc_sThe bike rides fine but the noise is annoying to say the least. Quote Link to comment Share on other sites More sharing options...
eastanglianbiker Posted November 28, 2016 Share Posted November 28, 2016 that sounds a bit deeper than just a tappet noise an easy way to work out where the noise is from is use a piece of wood and hold it on different parts of the engine while its running and put ear to the other end and listen and as you move it to different parts of the engine the sound will change but that noise sounds more bottom end than tappets so have a listen and see what you find out and let us know Quote Link to comment Share on other sites More sharing options...
Petermts90 Posted November 28, 2016 Author Share Posted November 28, 2016 that sounds a bit deeper than just a tappet noise an easy way to work out where the noise is from is use a piece of wood and hold it on different parts of the engine while its running and put ear to the other end and listen and as you move it to different parts of the engine the sound will change but that noise sounds more bottom end than tappets so have a listen and see what you find out and let us know I did as you recommended and true to what you initially thought, the sound was coming more from the lower part. I have subsequently taken the bike to my local garage and they suggested adjusting the tappets, since they do sound slightly out. They also mentioned fiddling with the "commander" and going from there. The rest of the sound is apparently normal for this engine as its a noisy one in general (identical to the one used in the XLR, similar build to the CG engine). I will pick up the bike tomorrow and let you know the outcome and improvements, if any! Will post another video too to compare. I've never owned a 125 that is essentially 18 years old now. It amazes me how the thing still goes and is much nipper than the newer bikes/scooters I've had! Quote Link to comment Share on other sites More sharing options...
Petermts90 Posted November 30, 2016 Author Share Posted November 30, 2016 Yep, it's bad news, the piston has been rattling away inside the bore and has scored the surface heavily. The mechanic still adjusted the valve clearances and other bits so I can ride it at my own risk, only charged me £20 for half hours work. I have since ordered a last of it's kind replacement engine from eBay with 7k on the clock and will be fitting it tomorrow and hopefully all my problems will be sorted from there. Many thanks for the assistance! I will post here again with some follow up pictures! Quote Link to comment Share on other sites More sharing options...
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