Filthy AND smokey exhausts - GT750 ??

[MikeH1A]

Now that it is miserable weather down under (frosts and snow are appearing) I've been playing with the J. One of the jobs was to replace the baffles in the two lower pipes. Once I could see inside, there was a pool of brown oil sitting in the bottom of each pipe. I wiped it out but once I went riding again, the same brown gooey mess reappeared and was seeping out the end of the pipe.

Question: Is this just accumulated muck, oil and condensation from long periods of sitting (the PO had it sitting for an undetermined period) or is it something a bit more unpleasant?

Also, the oil pump seems to be set up according to the manual but when I start up there is a LOT of smoke. Seems to settle somewhat once under way but comes back with a vengance if/when I grab the throttle. When riding, the right cylinder has a fairly constant flow of smoke and when I stop there remains smoke coming out of the pipe whilst it is still hot (think an old Western movie with the barrel smoking after the guy in black is shot). Seems to be drinking a fair bit of two stroke as well - despite the marks on the pump lining up.

Suggestions on what i should be considering here please?

Thanks, Mike

[tz375]

They all smoke and oil does accumulate if they are not run hard to burn it off. Some of the guys here like to back the adjustment off to reduce oil supply at lower speed. I don't. Just ride it harder to burn off teh crap. It takes a while, but it sure is a fun form of maintenance.

Another thing to think about is oil seeping past the check valves and leaking into the bottom end if it sits for long periods without running. Now that the long white cloud has settled in, it might be a good time to remove those old old lines and flush them through with isopropyl alcohol and makes sure they are sealing.

[MikeH1A]

Thanks for the tips. From my understanding of the PO, the old girl didn't see much action so I feel it may well be my duty to get her out on the open road more consistently

[oldjapanesebikes]

One other thing I suspect folks don't always consider is whether there is much carbon/soot accumulation in the pipes themselves. This pile is what I scraped out of two main pipes (left and right) and I got close to the same amount out of the two centre ones. I was surprised at the amount. I made a long handled tool with a rounded end that would fit through the baffle opening, or from the engine side of the pipe. You can see it in the photo.