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*** Update ***
Issue identified as a faulty carb and it will be replaced under warranty.
Problem details:
hey guys,
I have a pulsar 180UG 4 which is 3 months and almost 4000kms old. Had the second service done at 3500 kms (cause I felt the bike needed it).
Now, before the second service, I had tuned the bike myself. I took 6-7 tries but I had a decent enough tuning (45-46km/l), power balanced etc.
I did read through the afr tuning process many times and followed the procedures properly (idling at 4K rpm and then doing the tuning process).
But a problem of throttle varying was there since the beginning. When cold, if i held the throttle anywhere between 15-25%, the rev needle would oscillate by a margin of 1-1.5k rpm. This oscillation decreased when the engine is hot. Also, when the engine is cold, the bike would not accelerate smoothly due to this problem. The bike would pickup with jitters in that throttle range untill it lurched forward in a higher rpm range. But all this was much lesser in degree compared to now.
At the second service, I asked B.A.S.S. to overhaul and ajust the carb. They adjusted the carb via the CO tuning method. The guy who did it said my previous setting had the CO% figures through the roof - 6% to be precise (whereas for bajaj bikes its rarely above 2%). He tuned it to less than 2% but that was way too lean as it turned out since the rpm was unstable even at idling.
So I went there and they made it richer which solved the problem to quite a bit it's still worse than when I had tuned it myself (which sent the CO% rocketing). Now in winters its even bad. The engine takes 10mins of riding to warm up. Only then does the pick up become linear.
Now from what I can understand, the AFR is obviously not right. But correcting it send my CO emissions in a tizzy. But even last time, it wasn't perfect.
Is there any other problem I should be looking at? a clogged fuel line or something? I have tried to explain the problem to these people but they just shun what I'm saying as useless fretting. I dont know how i can even get them to acknowledge the issue.
BTW, after the second service, the bike has become a lot more peppier. Pickup and all has generally imrpoved by leaps and bounds.
Issue identified as a faulty carb and it will be replaced under warranty.
Problem details:
hey guys,
I have a pulsar 180UG 4 which is 3 months and almost 4000kms old. Had the second service done at 3500 kms (cause I felt the bike needed it).
Now, before the second service, I had tuned the bike myself. I took 6-7 tries but I had a decent enough tuning (45-46km/l), power balanced etc.
I did read through the afr tuning process many times and followed the procedures properly (idling at 4K rpm and then doing the tuning process).
But a problem of throttle varying was there since the beginning. When cold, if i held the throttle anywhere between 15-25%, the rev needle would oscillate by a margin of 1-1.5k rpm. This oscillation decreased when the engine is hot. Also, when the engine is cold, the bike would not accelerate smoothly due to this problem. The bike would pickup with jitters in that throttle range untill it lurched forward in a higher rpm range. But all this was much lesser in degree compared to now.
At the second service, I asked B.A.S.S. to overhaul and ajust the carb. They adjusted the carb via the CO tuning method. The guy who did it said my previous setting had the CO% figures through the roof - 6% to be precise (whereas for bajaj bikes its rarely above 2%). He tuned it to less than 2% but that was way too lean as it turned out since the rpm was unstable even at idling.
So I went there and they made it richer which solved the problem to quite a bit it's still worse than when I had tuned it myself (which sent the CO% rocketing). Now in winters its even bad. The engine takes 10mins of riding to warm up. Only then does the pick up become linear.
Now from what I can understand, the AFR is obviously not right. But correcting it send my CO emissions in a tizzy. But even last time, it wasn't perfect.
Is there any other problem I should be looking at? a clogged fuel line or something? I have tried to explain the problem to these people but they just shun what I'm saying as useless fretting. I dont know how i can even get them to acknowledge the issue.
BTW, after the second service, the bike has become a lot more peppier. Pickup and all has generally imrpoved by leaps and bounds.
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