@Pinaki Ji
The spark-plug looks to have nice light chocolate color.
Did you lubricate the threads with oil ?(First few threads have hard black carbon deposit)

Your spark plug is of correct color. However a little leaner will help in sharpening the throttle response and prevent carbon deposit on head. However it is best tuning if you are riding for long distance daily like me. Else if riding in city a slight leaner will help..

I was not talking about the new CD dawn. I was talking of the old CD dawn which had the same engine as ours.
The new model CD dawn shares the same engine as splendor pro, passion pro, CD deluxe(new model), splendor nxg. Those engines are different and their fueling and firing are also different.
The new series engine is more free and has more pick up because:-
1. The maximum torque is 8.04 NM @ 4500 rpm and 7.8 bhp @ 7500 rpm. The y2k engines in splendor/passion/ Cd dawn(old model) have 7.8 Nm @ 5000 rpm and 7.8 bhp @ 8000 rpm. Joy has 7.8 bhp @ 8000 rpm and 8 Nm @ 5000 rpm. So they making torque and power at lower rpm makes them have nifty acceleration.
2. They have thinner chains which decreases the mass of final drive and thus friction and thus feel free to REV.
3. They have DC CDI so their firing is uniform unlike our AC CDI.
4. Our rocker arms are of sliding types on camshaft but the new models have roller bearings on the rocker arm.
5. The carburettor and air filter are different so has better tuning and hence more better performance.
6. Now all have 44 rear teeth sprocket and the increased torque of 8.04 Nm increases their pulling power.

What about the chain lock trick ?

For this little improvement , particularly in torque ... I am willing to buy a new CD/Splendor . I love torque . More torque at lower rpms is something anyone will love in traffic . No ?
New Splendor+ has the new engine type or only the Pro ?

Champion PRZ7HC
What my plug is indicating? Is that black on the circle area is normal even on perfect ratio?

Your plug is indicating the setting is correct but however ride for few more kms and post. The black on the circle portion is perfectly normal and nothing to be worried.
I have inquired about your parts. If you do not mind a delay of 10 days is acceptable to you or not.

To tell you all....@Above_All....i think ashwin is correct.
Today i went to ASC to buy float bowl o-ring (the pic above) and i got a 440 volt shock when i ask them, also showed a picture on my mobile....he said Rs.800 for only 1 o-ring
How guys you are telling Rs.13, 25 or whatever
If u r right then send me a 2 NOS please, i'll deposit in your bank account.
Jet cost Rs.300 not bought
Got the air screw o-ring & 27x2 o-ring 91301028000S luckily only last piece was there.

Replies in bold.

See the reply in bold just after photo of air screw o-ring.
Both the o-ring and the rubber cap and clamp, all are available. If you want i can courier it to you.

You can change the back tyre to 3.00-18 without any problem. But adding a side luggage carrier will never dis-balance the bike. Look for other things like improperly seated tyre, or chain adjuster not adjusted equal in both sides.
The handle bar weights are from pulsar.
Each weight cost Rs.70.
Two allen bolt each cost RS.10
Two square 10 no. bolt Rs.4 each.
Welding the bolt to handle weights cost Rs.20.
Also you have to make hole in the factory grips to fit the weights.
And regarding your running, my 4 months running is more than your total running.
And regarding the first model CD dawn, i know it very well because our tenant had it and i have ridden it a lot.
While it looks same as JOY it has some difference:-
1. Lighter in weight than joy
2. Front shock absorber is like splendor and longer than joy
3. The front mud guard is different
4. The quality is different as else how will you see the price difference of almost Rs.10,000. Joy materials were of higher quality and CD dawn was launched to eat into boxer market which it did successfully.Still CD dawn had greater quality than competition. As you know hero honda never compromises on quality but still joy is best quality from hero and this has been confirmed by my mechanic and showroom. But sadly it didn't find acceptance in market.
So naturally i find all other bikes to be a shade lower in material quality. Even my new extreme i feel is lower in quality than my joy.
5. Joy has multi focal headlight and back light while CD dawn has plain reflector.
6. Cd dawn has much better light output than JOY.
7. CDI is different and magnet is also different.
8. Cd dawn has side handle lock but joy has ignition handle lock.
9. The meter console is different
10. CD dawn feels free to REV than joy because of different CDI and lighter magnet.
11. The front tyre of CD dawn is 2.75-18 while joy has a factory fitted 2.50-18 and i have not changed the size.
12. CD acceleration is slightly higher than joy because of weight advantage and also change in CDI.
Post a photo of your CD dawn and i will guide you how to retain showroom finish.

What if it is not in its place? any side effect?



I tried make it hot boiled in water hoping it may retain its shape but nothing happens.


U can get little brightness up by changing lights to led and removing the wire to the back light will increase your brightness. Also u can switch to philips premium H4 bulb has more brightness. You cant get higher brightness and no one can do this....there is no shop in jsr who can do this.
I've 2003 model.

Best would be if you can replace the entire headlight assembly with current CD-Dawn's MF Headlamp assembly including it's 35/35watts HS1 Halonix bulb . The current CD-Dawn's headlamp is quite good . Buy the OE set . Cost is reasonable . You'll get it at the HeroHonda authorised parts dealer for Bengal - Bansal Motors , Kolkata at Wellington Square near Jyoti Cinema hall .

Thanks.....okay no problem..i've no hurry even if it delay for a month.
I've driven more than 100kms on this plug before posting.


This is indication of my exhaust tip driven about 50 kms after cleaning.
its shining not wet as before. cant say if its smoking or not. any other way to inspect?

Edit:
I open my head to replace the valves...here is the pic before

I've seen a circle mark/line on the TDC (red line is an example)....looks like done by rings
and dont know why bore is looking black....its a layer of oil which is black..
Is that normal??
I got the new pair of valve oil seals with new valve kit, although i've changed before to the new one, i'm feeling those are very slightly loose than the new pair...i think those will work, in fact ran for 115 kms only.

and does this sprocket looks worn to u?? no?

or the bike was run for incorrect mixture in the beginning
YES
or ridden for short distances at low rpm. NEVER
or the swirling of mixture did not happen because of polishing the valve fillet area as a result slight deposits.(I think)MAY BE

When did you change the engine oil / how many kms on this oil ?

How many kms covered after cleaning the head ?

as I am from Jamshedpur I have to see the prices here and is the new cd dawns light good for Night highway rides or not if you can advice.
Thanks

The new CD Dawn's MultiFocal Reflector and Halonix HS1 lamp(OE) would be the best light available for your bike , without doing extensive/expensive electrical mods like rewinding the alternator coils etc . It would be adequate for riding at night in city . On the highways nothing seems to be bright enough , but yeah slowing down a bit you can manage .
Prices in Jamshedpur would not be different from anywhere else since they should be following the Hero Moto corp's pricelist . Else you can come to Kolkata to the Hero authorised distributor I told you about .