honda cg125 crankcase oil leak

[flying125]

Hi

I have a small (slow) oil leak from the bottom of the crank case of my 54-plate cg125 - I cant be sure exactly where it originates but the oil is apparent along the edge of the case where the gear shift lever enters the case.

I have only noticed this recently - and only after I heard some unusual noises coming from the general area of the engine when slowing down at traffic lights from ~65mph to a complete standstill (note: the noise only happens when slowing down from sustained ~65mph speed).

Its difficult to explain the noise - but it disappears after I change down gears from say 4 to 3.

Is this is a common problem and something to be concerned about?

In case its relevant the oil level is only just above minimum (according to the dipper) - but I did top it up recently as it was not even registering on the dipper.

Thanks in advance
Mark

[MaybeGuy]

sounds like it could be your gear selector shaft seal. about £2 from a dealer, whip off the cover, drive a wood screw into the existing seal and yank it out, then drift in the new one making sure the lips of the seal seat.

personally i always keep my oil right at the MAX mark, i think its best to as it means the engine is always lubricated correctly.
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Blue_SV650S wrote: it was a sh1te wheelie, but it proves that he can get it up in 3rd and can do angles. In summery, mattsprattuk is a gobby little sh1tebag, dopehead tw4t, but sadly for all of us, he probably isn't THAT full of sh1te!!
Kickstart wrote: Hi I tend to agree with Matt. All the best Keith

[flying125]

thanks for the quick feedback - that might save me the cost of a trip to the nearest bike shop.

I also read on tinternet about the possibility of a leaking/pinched crankcase breather tube. Im not sure where this is - or if it applies to this scenario.

FYI I bought the bike 2nd hand in March '08 (my first bike!) and had it serviced at the local honda bike dealer (bransons, gloucester) to ensure it was all kosher - but I noticed the oil level didnt register on the dipper from day 1 after the service - I thought I must be measuring it wrong (as the dipper on this bike is a bit crap). I recently (about 3 weeks ago) topped the oil up on the off-chance that I should believe what I was seeing (and yes it was on flat ground). I personally think the dealer didnt put in as much oil as they should have - but maybe Im being paranoid. I'll get a Haynes and do it myself from now on.

Flying125

[MaybeGuy]

its apparantly notoriosly difficult to kill a CG. after this much time, i would imagine the first thing you would notice as far as the engine eating itsself would be the clutch wouldnt't act normally (as its sump lubricated).
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Blue_SV650S wrote: it was a sh1te wheelie, but it proves that he can get it up in 3rd and can do angles. In summery, mattsprattuk is a gobby little sh1tebag, dopehead tw4t, but sadly for all of us, he probably isn't THAT full of sh1te!!
Kickstart wrote: Hi I tend to agree with Matt. All the best Keith

[jack_zxr400]

did you empty out the old oil before you refilled it?
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Previous Bike: ZXR 400
Current Bike: R6
Test Date: 8/8/2008-PASSED