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Mileage Problem in Discover 100 ( 40kmpl only)
I am again with a problem. 
My bike ( Bajaj DIscover 100 , 2011 sept model) is giving mileage between 40-44 kmpl)
Let me tell the history first then i will come to the point.
*The bike used to emit white smoke at higher speeds ( like at above 80-85 when dragged the bike used to emit smoke and when stopping the bike used to go dead and wont respond for 1-2 mins, after that it used to start again by kick / es) that time i went for a piston ring change ( as per experts advise ) but the mech could not find the rings so the piston was replaced with 1 over size piston and had to bore the cylinder wall) the problem solved afterwards .
P.S : i followed the running in at 40-50 km/h till 500 km.
The bike used to give an average of 52- 55 kmpl then.
*After that the bike mileage dropped to 50 and i approached to svc center again and they told me clutch burnt and the clutch replaced ( but mileage did'nt increased)
* After that i changed my spark plugs as per svc center's advice and they told us to check the spark plug color after a tuning to see the difference and while doing that one fine day i over tightened the plug and later the thread broke , Again i had to open the engine and had to fix the spark plug thread with welding.
Now for last one month the milege is between 40-45 and sometimes i get wonderful figures like 34-35 too.
Last Sunday i took it to a mech again and checked , washed carb, cleaned air filter , checked chain . But nothing improved.
( now again i can see little white smoke at higher speed drags on semi synth oil , in synthetic oil [ Agip 10w40 i did not noticed any white smoke even at 85-90s] and at idle sometimes a metal slap sound can be heard [ which may also be my psychological condition error as now whatever happens i think as big trouble , i dont know / i am not sure ])
I keep tire pressures exact , i fill them in 3-4 days , brakes are not tight , chain is well lubricated , whatever possible i did to keep it healthy.
and I have checked the tuning too myself and from the mechs too. in 1.5 turns of the fule screw from full tight it returned 44 , in 3.5-4 turns from full tight it returned near 42-44 .
What is wrong please help. this bike became a real headache for me , and i can not sell it as installment is not over till now ( 6 months left) , warranty gone as i did the piston work from outside as the srvc center asked for more money than outside.
[ i know driving at 85-90 is not advisable in this bike , but i usually don't drive at those speeds , i just checked for the smoke problem , and i usually drive at 50-65 within the city]
please help.
My bike ( Bajaj DIscover 100 , 2011 sept model) is giving mileage between 40-44 kmpl) Let me tell the history first then i will come to the point.
*The bike used to emit white smoke at higher speeds ( like at above 80-85 when dragged the bike used to emit smoke and when stopping the bike used to go dead and wont respond for 1-2 mins, after that it used to start again by kick / es) that time i went for a piston ring change ( as per experts advise ) but the mech could not find the rings so the piston was replaced with 1 over size piston and had to bore the cylinder wall) the problem solved afterwards .
P.S : i followed the running in at 40-50 km/h till 500 km.
The bike used to give an average of 52- 55 kmpl then.
*After that the bike mileage dropped to 50 and i approached to svc center again and they told me clutch burnt and the clutch replaced ( but mileage did'nt increased)
* After that i changed my spark plugs as per svc center's advice and they told us to check the spark plug color after a tuning to see the difference and while doing that one fine day i over tightened the plug and later the thread broke , Again i had to open the engine and had to fix the spark plug thread with welding.
Now for last one month the milege is between 40-45 and sometimes i get wonderful figures like 34-35 too.
Last Sunday i took it to a mech again and checked , washed carb, cleaned air filter , checked chain . But nothing improved.
( now again i can see little white smoke at higher speed drags on semi synth oil , in synthetic oil [ Agip 10w40 i did not noticed any white smoke even at 85-90s] and at idle sometimes a metal slap sound can be heard [ which may also be my psychological condition error as now whatever happens i think as big trouble , i dont know / i am not sure ])
I keep tire pressures exact , i fill them in 3-4 days , brakes are not tight , chain is well lubricated , whatever possible i did to keep it healthy.
and I have checked the tuning too myself and from the mechs too. in 1.5 turns of the fule screw from full tight it returned 44 , in 3.5-4 turns from full tight it returned near 42-44 .
What is wrong please help. this bike became a real headache for me , and i can not sell it as installment is not over till now ( 6 months left) , warranty gone as i did the piston work from outside as the srvc center asked for more money than outside.
[ i know driving at 85-90 is not advisable in this bike , but i usually don't drive at those speeds , i just checked for the smoke problem , and i usually drive at 50-65 within the city]
please help.
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