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Originally posted by te05
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Hi,
Despite being an old member, I've hardly expressed myself on this lovely forum, while regularly browsing through the 'talkies'.
I own a 2006 zma that has clocked 35K. Hardly using it for my daily commute to office for a long time now. I've been living with a long list of issues.
Before I list down, I must let know here that during all my long rides, these issues hardly bother me, only for the fuel consumption - just 25kmpl(It used to be better earlier despite all the ripping sessions)
Yesterday, I rode out to the market and was mightily pissed! and now I'm forced to write
I've been trying to figure out the cause of all these issues with my humble mechanic, but in vain...
1. Idling not constant - The idling has a lot of variation and many times the bike stalls suddenly while running on decent idle speeds(on all of the signals). I have not been able to identify a typical pattern when the engine stall during idling.
Note that I make sure the engine is warmed for a couple of minutes before I ride.
2. During a cold start, when the choke is used, the bike runs either with the choke completely ON or me throttling the accelerator.
I mean, using choke while warming - say, decreasing the choke from ON or increasing the choke from OFF, has to be done instantly, like a switch - either ON or OFF, else the engine stalls halfway.
3. All the revs below ~5K RPM sticks and the revs do not come down normally on deceleration. This, however, does not happen and the revs come down perfectly for anything above about 5K.
4. Yesterday, after driving in the traffic, I sensed that there is a lot of jerking at slow speeds even with correct gear shifting. eg., even in first gear, the acceleration is not smooth and with a lot sudden jerks - add to it the very sticky revs not coming down.
None of these issues are noticeable post 5K rpm.
I'm not sure if all the issues here point at one single culprit or multiple sources.
My mechanic has failed badly for a long time to identify the source for this issue. I tried ASC also, but I always knew they wouldn't be able to resolve and I was right.
The carburetor was cleaned repeatedly and tuned but to no avail. We looked for air leaks - the insulator with the O-ring has been replaced.
I'm always suspecting that there is some leak that has not been fixed due to which the engine should be running very lean - the cause of sticking revs.
I'm contemplating on replacing the carb as a solution, but have still held on and not changed.
My mechanic says it could be either of the carburetor or some electrical issue that is going unnoticed.
One last, but important thing - The air-screw of carburetor was jammed a couple of years ago and was opened up by drilling and replaced. First, I felt the issue is because of tuning and got the air screw removed. Later any kind of tuning of the air screw has not helped, and I have sealed it with RTV Silcone sealant(Anabond 666T) in despair and that has not changed anything...
Help me please
Despite being an old member, I've hardly expressed myself on this lovely forum, while regularly browsing through the 'talkies'.
I own a 2006 zma that has clocked 35K. Hardly using it for my daily commute to office for a long time now. I've been living with a long list of issues.
Before I list down, I must let know here that during all my long rides, these issues hardly bother me, only for the fuel consumption - just 25kmpl(It used to be better earlier despite all the ripping sessions)
Yesterday, I rode out to the market and was mightily pissed! and now I'm forced to write
I've been trying to figure out the cause of all these issues with my humble mechanic, but in vain...
1. Idling not constant - The idling has a lot of variation and many times the bike stalls suddenly while running on decent idle speeds(on all of the signals). I have not been able to identify a typical pattern when the engine stall during idling.
Note that I make sure the engine is warmed for a couple of minutes before I ride.
2. During a cold start, when the choke is used, the bike runs either with the choke completely ON or me throttling the accelerator.
I mean, using choke while warming - say, decreasing the choke from ON or increasing the choke from OFF, has to be done instantly, like a switch - either ON or OFF, else the engine stalls halfway.
3. All the revs below ~5K RPM sticks and the revs do not come down normally on deceleration. This, however, does not happen and the revs come down perfectly for anything above about 5K.
4. Yesterday, after driving in the traffic, I sensed that there is a lot of jerking at slow speeds even with correct gear shifting. eg., even in first gear, the acceleration is not smooth and with a lot sudden jerks - add to it the very sticky revs not coming down.
None of these issues are noticeable post 5K rpm.
I'm not sure if all the issues here point at one single culprit or multiple sources.
My mechanic has failed badly for a long time to identify the source for this issue. I tried ASC also, but I always knew they wouldn't be able to resolve and I was right.
The carburetor was cleaned repeatedly and tuned but to no avail. We looked for air leaks - the insulator with the O-ring has been replaced.
I'm always suspecting that there is some leak that has not been fixed due to which the engine should be running very lean - the cause of sticking revs.
I'm contemplating on replacing the carb as a solution, but have still held on and not changed.
My mechanic says it could be either of the carburetor or some electrical issue that is going unnoticed.
One last, but important thing - The air-screw of carburetor was jammed a couple of years ago and was opened up by drilling and replaced. First, I felt the issue is because of tuning and got the air screw removed. Later any kind of tuning of the air screw has not helped, and I have sealed it with RTV Silcone sealant(Anabond 666T) in despair and that has not changed anything...
Help me please
Originally posted by acs1207
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Correct, all the problems are below 5K RPM. Spark plug has been replaced and new.
Any specific pipes that I should be looking at? Like I said, the insulator has been replaced.
On highways, I'm mostly at the upper RPMs and am getting a figure of not more than 25kmpl.
City riding should improve that by 3-4 is my guess, not checked though.
Earlier, it was around 40 in the city and 30s on the highway.
About performance, below 4.5k is jerky and sluggish, above that, tops at ~128
Originally posted by psr
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If You had removed the air screw please put it back with the "O"ring and set it to 3.5 turns anticlockwise from fully clockwise stop....go through the thread,and you will find the solution...
Yes, after the air screw was drilled and removed, it was replaced with a new one. I'm not very certain on the 'O-ring' part though as it was a long time ago.
Thanks, I will look out for a solution on the thread.
Looking into the ocean, its very interesting and a whole new learning experiences.
If you remember any post that could help me in specific, please direct me. Meanwhile I continue my search
Originally posted by acs1207
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I'll try to check for leaks, lets see if I hit upon anything.
Should I look also be looking from the electricals point of view?
.
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