Bad rebore job. Initial culprit: Piston rings. Contrary to what others have said, wetsumping will produce white, not black smoke.

Also, check your compression, both when the engine is cold and hot. Also, since you say it is only during start up, it could be wetsumping. Could also be a bad rebore job cos I remember you opening your engine up lately.

Cheers,

Jay

@Jay: Are you sure? Because as far as I know, burning of oil during combustion would cause a bluish - white exaust smoke. I faced the same on my Xtreme once, and thus can relate.

Ideally a rich mixture of fuel should give black.

Thank you everybody for replying and I have made a note of the following points after seeing the reply in the thread.

1. Pistons Rings
2. Engine Oil Level
3. Timing
4. Piston Gap
5. Worn out Inlet valve Guides
6. Spark Plug check- will do that myself.

Cylinder Kit, Piston and Pistons rings are brand new but will check it again.

I will get these things checked and if the issue persist, I'm not taking it to amy Mechanic any more as I canot afford to spend my weekend at Mechanics place trying to get it up and running. I will switch back to ZMA for a while and rebuilt the bike myself all over again. I have Pete's Manual and I think I can do it slowly and steadily.

I have taken care of my friend's Standard for a good 9 months when he was onsite and I did not face issues like this type.

4stroke. edited..

Are you sure? Its white smoke always from a bad rebore done on 4 strokes.
+1 to KURTRULES

You may want to visit this site


Since you're in Bangalore, just see how much this could help you. Looks like this guy is very passionate about RE's. If you happen to stop by this guy, pls share your experiences here

I reiterate, white/blue smoke means your bull is burning oil. White smoke and blue smoke, more often than not are the same. Kurt, this could be the case. So people, no point arguing on this. This could be due to shot piston rings or also due to wet sumping. The simple solution is to park your engine at TDC while not in use. Try this and get back. Refer to wet sumping in chapter 3 on the Snidal manual.

Cheers,

Jay

Trouble identification from smoke colour

Even though smoke from the silencer of perfectly tuned engine is invisible but all types of smoke are not trouble indicators.....Check the following
1.)Thin white fumes
Perfectly harmless....Often seen during the starting of vehicle from the cold in the morning....This is simply due to condensation of water vapours inside the exhaust system and may be accompanied by a slow drip of water
2.)Thick blue or grey smoke
Something to worry...May be due to burning of lubricating oil in excess...Something to be inspected and rectified
3.)Black sooty smoke
Something very serious...Followed by decrease in mileage....To find out the cause systematic investigation is needed...Better consult a trained mechanic
4.)Tick white Smoke
Very very serious trouble...Causes due to burning of coolant, damaged gaskets,damaged cylinder head e.t.c....Consult a mechanic

Worn out Inlet valve guides and harline crack in the cylinder head was causing the oil to enter combustion chamber.

There were lot of thing that changes after the overhaul.

Engine Oil level reduced drastically and today it was at Low. Topped the oil and took the bike to the Mechanic who told oil was entering the combustion hamber and he told he will have to open up all over again.

I had made a check list from the posts in this thread and asked him to check the following things.

1. Pistons Rings
2. Engine Oil Level
3. Timing
4. Piston Gap
5. Worn out Inlet valve Guides

We noticed that there was oil leaking from the Cylinder Head near the spark plug. He checked the exhaust and confirmed that oil was burning.
Opened the engine and inspected the part that I mentioned. Worn out Inlet value guides was causing the issue, Mech told me that vale guide should not have a play and this was moving from one side to another freely which required replacement.Also near the valve there is a thin hair line crack.

No issue with the bore or other parts mentioned. We decided to replace the Head with a new one. Will be collecting the motorcycle on Sat as he would like to run the motorcycle for a day before delivery.

Thank you everybody for replying. All the post in this thread were helpfull in finding the route cause of the issue.

I will update the final status once I have the motorcycle in my hand and used it for few days.

sometimes white smoke means we now have new pope

Hello All,

Thank you very much everybody for replying. My issue got fixed but it started having starting issues with my motorcycle. It takes 15 to 20 minutes to start it in the morning. Once started and kept in idle for few minutes, it starts with single 90 % of the times and sometimes requires 2-3 kicks to get it up and running. This was not the case before. I used to follow the steps below and it used to fire up

Starting the Royal Enfield Motorcycle

switch is located by the throttle, on the right side of the bike.





3. If the engine is cold, push down on the gold colored choke lever. It is
located on the right side of the bike about where your knee is.

4. Engage the compression release. This is the lever on the underside of theleft hand handlebar switches. It is engaged by pushing it forward.

5. With the compression release engaged, kick the bike through 3 times.


6. Turn the ignition switch on by turning the key to the right.

7. With the switch turned on, choke on, the throttle closed, and the
compression release engaged, gently move the kick start lever and note
the movement of the ammeter gauge. It will deflect to the left and then
come back to the center. As you slowly turn the engine over, watch for the ammeter to deflect to the left. Now move it a little more until it just comes back to the middle. This middle position means that the piston is poised exactly where it should be for starting.



9. If the engine is hot from being very recently run, you can omit steps 3, 4,and,5 .


(especially if people are watching you) is to start kicking blindly without
using steps 7 and 8. This is a route to total frustration and a complete loss of your manhood.( or womanhood ).

kicks

Please suggest. I have cleaned the sparkplug and will be checking the fuel lines this weekend. Please suggest.

Starting RE

Thank you sir. All issues sorted out. My motorcycle runs perfectly.

Thank you everybody for pitching in, to sort out the issues my motorcycle had.
Mods:- you may close this thread.

problem wit my fz16

white smoke form my fz exhaust at high rpm and its recently serviced

Thread 'problem wit my fz16' approved and merged