Help! Gotta a 98 Mesquito Fogger!!

[tjbarbie]

Trying to help a Christian brother who has a 98 Valk. Got training wheels on it where he was in an auto accident...ran over him. No.1 cyclinder got oil in the exhaust pipe. I have gone all the way to splitting the case and pulling the pistons to check rings, cylinder walls etc. Bike got less than 50K and looks great on the inside. No froze rings etc. Replaced all the valve stem seals as they were beginning to harden. Had a machinist do a visual on the right head but nothing obvious appears. Anyone got any idea where to begin???

[Valker]

Does the clutch fully disengage? If not, I'd guess his clutch plate rivets came loose and are blocking the screen. Not sure why this causes the horrendous oil smoke, but it does.

[art]

change the head gasket first,don't pull the engine yet.I had water in my oil an changed the head gasket an still had water coming out the exhaust.I pulled the heads again an had them milled an pressure checked,did a valve lap job at the same time.I then dye ckecked the cylinders for cracks an found nothing so I replaced the head gaskets again  an now the engine runs great with no loss of oil or water.Art

[Robert]

Need a little more info, How much oil, does it smoke out the exhaust from all cylinders, how does the bike run missing or anything. do you have it back together.  When it did run how did the plugs look fouled or good, I am posing questions and obviously you know something about engines but your description leaves pieces of the puzzle out. like how did the head gasket look did you see any dark areas that dont look like there was head contact. How does the grooves on the piston look do they have any build up and the top of the piston is it oily? For a oil situation I dont think I would have taken it down that far just yet. I also dont understand the training wheels deal. and like was stated before look at the pickups the may be plugged it will be the scavenger pump.

[Ricky-D]

You already went way farther than you should have!

Put it back together and see if it starts.

***

[Grumpy]

I agree, run it. Probably nothing wrong with it. I had an accident on the way to inzane in saginaw,MI. The bike was on its side for about 1/2 hr. after I got it home, cranked it up and it looked like a mosquito fogger for a while . After about 20 min running it at about 2000 rpm, cleared up and hasn't smoked since, flat engines when laid over, oil will pass the rings and get in the exhaust, should be all that is wrong with it.

[Jeff K]

Anyone got any idea where to begin???

You are WAY past the beginning. Troubleshooting should have started before you pulled the motor and split it.

[tjbarbie]

Hi Folks;
Sorry bout lack of detail. The training wheels I referenced is a conversion kit (craddle style where as you drop the rear tire into and maintain the normal drive through original drive line) Basically the craddle supports the ride so the rider is free from falling over. As to what we originally found...A compression check shown minimal diferrence between cyclinders.. less than 10 pound deviation. The cylinder walls were cean, no lipping, pistons clean with minimal carbon if any and rings look and felt free in groves...not removed from piston to prevent breaking. The original headgaskets looked great with what appeared to be normal seating. We did replace both with new at reassembly. New Carb o-rings were installed and new water system gaskets (o-rings) were installed. The bike fired off and ran fine to my taste. I think the carbs need balancing as to my ear at idle seems to be laboring but drives fine and we put it to the highway at 60-65 mph no issues other than smoke. On original fire-up I elluded the smoke to oil that was possibly left in tailpipe from earlier issue and within about 6-8 mike seem to be clearing. After bike was parked and restarted seem that original issue came back pretty bad. We are presently in the process of following the posted instructions to remove the various pieces of smog.....lines, pair valves, etc. The owner has looked at various lines (I have not) and once things are cleared so one can see I want to make sure remaining lines are installed correctly. I was torquing heads etc while owner was fishing lines. I can turn a wrench but I am not motorcycle mechanic and really appreciate the feedback from the experience riders.THANKS. Does this lay the groundwork? Feel free to ask specifics and I will respond accordingly.

[Robert]

Man you sure went round the world to arrive back at where you started, sorry, but yes that is alot better as for what was done and how. But is it just one side that is smoking or maybe one cylinder? Now that it is assembled did you pull the plugs to see if you could pinpoint a cylinder. Just a idea it was kind of interesting your description that the problem didn't show itself till you stopped the bike. That all was well till then and that even the running of the bike is ok. I would like to know if the oil is dripping into the exhaust and smoking or being burnt by the engine. Plugs will tell you this. The oil separation canister has a oil line directly to the crankcase and to the air cleaner,check this it shouldn't be filled with oil maybe a residue or maybe a vacuum line is going to this instead? Also are you sure its oil?

[Ricky-D]

I feel you can't form an opinion on such short running time.

I suggest keep riding it and after a few thousand miles you will have a better insight into what the problem, if indeed the problem still exists, might be.

***

[tjbarbie]

Hello Folks;
Forgive my tardiness in posting back but was out of town for a period. Here is the most recent update on the Mesquito Fogger. We completely reassembled the bike removing all the smog as we went as per posted dwgs placing blind caps where needed. I had the owner take the bike as I was leaving and pasted along your suggestions to ride it several miles and see if it cleared, perhaps burning out captured oil in the pipe itself. I seemed as though it was going to clear as it got significantly better then took a nose dive for the worse again. Someone asked which pipe was showing the issue....No. 1..Front Right Side of driver. We had a major downpour which has destroyed the road into my home (dirt street) and cannot get the bike into my gargage at the moment. The owner is think scavenger pump?? Anyone got some solid thoughts where I might procede without over doing it this time  I appreciate all of the thoughts the group has passed along. I did print out your various post and give to the owner as he does not have personal email...hence the reason I am acting as go between to help. See ya later. Tom Johnson