I've been facing problems one after another on my XCD 135 DTS-Si bike,for the past 2 months.Before that,the bike was in excellent condition with a mileage of 70-75kmpl and was in touchwood condition.I'm presenting the case history and problems I'm currently facing.
History-One day the tachometer started dancing,I mean,it used to go on its own to 12k rpm and come back to 0 rpm and so on during normal city ride,and the engine also started misfiring.On inspection,it came as a loose wire near battery,which goes into a white cylinder sort of thing, and the service advisor asked me to tighten it whenever such problem arises.He also mentioned that the part acts as a voltage regulator sort of thing with some Xvolts coming inside it and Yvolts going out of it.I don't exactly recall the part name..After two days,the clip of the wire which hooks itself to the cylinder's termina, burnt,which I replaced using horn clips.The service advisor asked me to replace the entire electrical system of the bike as there is no separate part for the clip.But I ignored him as the bike was perfectly normal on that setup.
Current problems
1.Poor pickup till 3k rpm-Its not exactly poor,but the throttle response is not the same it used to be earlier.The exhaust sound below 3k rpm is also changed,it feels like the sound when the bike starts to go in reserve.
2.A peculiar misfiring sound like "BHAD-BHAD" comes from the exhaust when I leave the accelerator to decelerate.However no jerking is felt.
3.When I try to ride slowly(for example 30-35kmph @ 4 th gear @3k rpm) and keep the accelerator constant,the bike sometimes jerks and this happens only when the accelerator is open just 1-3%.I hope you understand what I mean to say.WHen the throttle is generously open,this problem doesn't occur.
4.WHitish smoke appears from the exhaust then the bike is revved to 9-10k rpm in neutral.Is it normal??Also black soot formation has occured at exhaust tip.
Some relevant information regarding my bike which may help you to diagnose
1.Parts changed:
--Spark Plugs
--Clutch Plates
--Air Filter
2.No drop in engine oil level.
3.Mileage-70-75kmpl
4.Odo Reading-23456kms
5.Have always used unleaded fuel(No extra premium or High octane fuel).
Kindly help me,I'm in a great agony due to the pitiable condition my bike is in



) and cdi for any faults as it can also create misfiring issues.

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