Exhaust oil leak

[Ant132]

Hi,

I bought a bike on the weekend, a Honda CB250, but its had the 400 engine put in and registered. On the exhausts, where the silencer and downpipe meet, on both sides, it leaks oil.

It doesnt leak from the end of the silencer, just from the join, and some smoke in the mornings too.

Heres a pic of what comes out and i had it started only a few minutes.
https://i374.photobucket.com/albums/oo182/Ant_132/25062005001.jpg

Should i be worried that theres oil coming out of there or not?

Another thing, the gear lever linkage, its very wobbly and although it changes gears fine enough its not as i imagine it should be so what would i be looking to replace? or is it normal on these?

Thanks, Ant
____________________
1980 Suzuki TS50 ~ 1984 Honda CB400N ~ 1992 Triumph Trident ~ 1998 Suzuki Bandit 1200

[SoND]

Are you sure it's oil or is it watery carbon?

If there was that much oil in the exhaust it would be incredibly smokey.

[Ant132]

Theres a small amount of smoke on the choke in the morning and then after about a minute or two its fine, no smoke and the engine sounds good. (just a bit of smoke from the exhaust where it leaks)

How do you mean watery carbon? I only assumed it was oil because of the colour really Or do you mean it could be condensation or something but the exhaust is coked up?

Ant

Edit: did a video, https://uk.youtube.com/watch?v=ezIywCXJWGQ youtube sound is a bit distorted but i think it sounds ok, right??, a bit slow at revving although i dont like to give to loads in neutral
____________________
1980 Suzuki TS50 ~ 1984 Honda CB400N ~ 1992 Triumph Trident ~ 1998 Suzuki Bandit 1200

[alun111]

Look underneath at the exhaust (when it's cold obv). Is there a perfectly round small hole in the bottom of the pipe? If so it's supposed to be there and the "oil" you're seeing on the floor is condensation from the low point in the exhaust. The hole is pre-drilled to allow that condensation a means of escape to stop the exhaust from rotting!
____________________
Summer: '00 Honda CB600F Hornet
Winter: '93 Suzuki GSF 400 Bandit VP Variable Valve
Past Bikes: Lifan LF100-5 Lifan LF125-A Honda C70

[SoND]

[Ant132]

Great stuff guys

I thought i was going to have to keep an eye on the oil levels if it was going to do that every day.

One more think, can it be good for the bike to run at about 500-750 rpm like mine is at the moment, cant find the idle screw and dont wanna mess with it till the manual gets here. But surely it should be higher. Can winter/cold weather make a bike idle lower?

Ant
____________________
1980 Suzuki TS50 ~ 1984 Honda CB400N ~ 1992 Triumph Trident ~ 1998 Suzuki Bandit 1200

[alun111]

Once the engine is up to temperature your idle should always be the same - unless of course carb icing is occuring - in which case you'd know because as soon as you took the choke off it'd try and cut out (even if the temp gauge says it's warm enough).

It doesn't really matter that it's running at low revs, as long as it's a steady idle and it's not cutting out you'll be fine.
____________________
Summer: '00 Honda CB600F Hornet
Winter: '93 Suzuki GSF 400 Bandit VP Variable Valve
Past Bikes: Lifan LF100-5 Lifan LF125-A Honda C70

[Finglonga]

[Ant132]