I purchased pulsar 150 dtsi in year 2004. I love the bike mainly because at that time it was one of the best looking. It gives me 50 kmpl mileage in Bangalore city traffic. It has a reasonably good shock absorber and hence the ride quality is reasonably good. Infact I have driven it all the way from Bangalore to Kanyakumari a distance of around 750 kms without much tierdness. Its a very stable vehicle and is confidence inspiring even when driven rashly. Best if driven smooth.
I maintain my bike well and drive at reasonable speeds and rarely go for some rash driving. I find it maintenance free.
The bike is designed with average to tall gear ratio. Bike makes 60 kmph speed at 4000 rpm which is fairly good for long drives.
I personally find that the bikes power eventhough on paper is around 14 bhp doesnt feel that way in reality. At high speeds its not that responsive and CBZ extreme or unicorn would beat a pulsar.
Overall its an average to good bike.
Modification Part 1 - Engine
Pulsar with charismatic heart -(engine modified to 6656.4 mm
bore * stroke dimension) Oversquare engine.*
I have a pulsar 150 dtsi 2004 model. The bike had done around
36000 kms and running nicely. It had no issues. I just wanted
to de carbonize the engine and enhance the performance and
efficiency. I knew a mechanic near my house(Ganesh) who is good at
engine modification/restoration kind of work.
One fine day took my vehicle to his garage. He suggested me to
go for a engine over haul. So we decided to dismantle the
engine and found a good amount of carbon deposit in the
cylinder head, valves, piston etc.
He suggested to get the engine rebored, the inlet and exhaust
ducts machined / polished with slightly higher diameter. This
enhances fluid flow to and out of the cylinder. Adding to this
he suggested to go for new pistons and valve sets.
I had a wild thought of going for increasing the cubic
capacity of the engine. So we discussed and I gave him a free
hand to experiment.
After two days I got a call from him saying that we can try Karizma's(Hero honda) piston and bore. I gave him the green signal and after a day we got the engine head and body rebored to accomodate the bigger bore of karizma and new karizma piston(original bore of pulsar stands at 57 mm diameter against the karizma bore at 66mm).
He assembled the engine which took another whole day. And now my engine has 66mm(bore) and the stroke remains unchanged at the original dimension of 56.4 mm(stroke) which translates to 192.86 cc close to the pulsar 200 dimensions:)
The cost of machining came to 3250 Rs(INR). This includes the reboring, new karizma piston, valve setting, crank / connecting rod resetting(because my original connecting rod had a minor shake), head polishing, inlet and exhaust ducts machining for enhanced fluid flow etc.
Spare parts costed around 3500 Rs. Totally it costed me around 8000 Rs including labour charge. This overall cost could vary based on your existing engine parts condition whether we can reuse existing parts or have to go for certain replacements.
Just got the vehicle done yesterday and now its in the run in period so am driving carefully keeping the engine revs below 4000 rpm. I can feel the difference in power.
The end result is a over square engine . A over square engine(like the one offered in Apache RTR 160 bike) is an engine with the bore(diameter of engine cylinder) size being more than the stroke(cylinder length or piston travel distance). Over square engines are known for enhanced power and slightly lower torque. They can run at higher rpms than square or undersquare engines.
Overall engine efficiency will be good with slight reduction in mileage. I can give a better detail after the run in period or after the vehicle has run in around 1500 kms.
The expert who did this is Ganesh, the mechanic from Munnekolala, Marathalli, Bangalore.
You can contact him on 9964839731
He is not so well conversant in English but can communicate in Hindi, Kannada, Telugu and Tamil.
Modification Part 2
Date 29-08-2008
I replaced the original 44 teeth rear chain sprocket with a 36 teeth sprocket(Sprocket designed for bajaj M80). The fitment holes on this sprocket didnt match the ones for pulsar. So I had to contact a nearby machine shop guy for drilling holes accurately as per pulsar's dimensions. Total cost was 125+100 I mean sprocket+drilling cost. Then I did the sprocket replacement and my pulsar is cruising comfortably at 80 - 90 kmph speeds, am getting better mileage but the initial pickup is compromised a bit.
Since I am not so particular about high pick up I personally liked this comfort crusing. Especially if you are mostly drive alone(i mean without pillion) you can get better mileage roughly around 10 kmpl plus.
- Thank You! We appreciate your effort.