Hi All,

Thanks for all you suggestions. I wanted to push going for new bore kit due to finance things, so I started to work on alternative things suggested by Pinakiji and others. below are the things made:
1. Changed to new air filter. (Oiled the foam as suggested)\
Good job , Did you oil outer black foam or the yellow foam ?

2. Checked for chain timing and oiled its as felt it was dry. Looks perfect.
Timing chain doesn't need lubrication as it is lubed by engine oil itself

3. Checked for engine oil (had changed recently), found enough engine oil almost close to max.
Its ok then , Oil level should be between min and max points on dipstick.

4. cleaned spark plug (found small amount of carbon deposit).
Might be running slightly rich. Turn AFR 1/8 turn anti-clockwise.

Will all above things, bike is going on smooth with one kick start. I wanted to know further that on removing spark plug it was smelling with petrol, at exhaust found bit of carbon deposits also smelling petrol but on running engine was not noticing any white smoke. With this Do I need to take care of any thing? like Air screw O-ring change and others? If yes, could you please have a snap of it which I need to work on? ( I'm beginner so need to know which I need to take care off )



With all this changes how long I can drag for going boring kit? please suggest

[ATTACH]201533[/ATTACH]I recently tried to tune my CD DAWN. I ran it for 1 week and taken photo of spark plug. Can you suggest how is condition of A/F mixture?
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Continue with this tune. Its good. Mileage will be in between 68-72 kpl.

But i am getting approx 60kmpl. not 68 to 72

Yogesh

... I ran it for 1 week and taken photo of spark plug. .. how is condition of A/F mixture? ..

I really regret not finding you guys before the rebore. If I would have got thumbs down from Sibun Sir for the rebore I would have never done that. I didnt knew the consequences. I have seen people doing rebore couple of times on the same bore so I thought it is quite normal. Anyways, now the money has been spent and I should honestly say that I dont have enough funds for the rebuild for now.

Sibun Sir ........ On my previous post theres a typing error. Previously I was getting the reddish Spark but after modifying the spark plug it is giving White/Bluish Spark. I know I have gone off road to modify the Spark Plug because I couldnt find a Non Resistor Spark Plug. HH Service Center is selling only Champion Spark Plug PRZ7HC. What I did with spark plug :- Opened the Champion Spark Plug and took off the resistor from it and then took a solid core copper wire and inserted it at the place of resistor and now the spark plug reads almost Zero resistance on multi meter. Off course my plug cap is also OE that came from factory , never changed till now and its 10 year old.

Its definitely Engine Oil on the spark plug. I can confirm it because as soon as I start the bike, first 10-15 puffs of exhaust smells as if oil is burning in combustion and after 4-5 seconds it smells perfectly like 4 stroke petrol engine. (I know the difference of both the smell)(It does not give white smoke its just the difference in smell)

I will definitely change the Air Screw O-Ring as suggested. As in my previous post I have mentioned that when I opened the air screw it had some black sooty stuff on its lower part which i cleaned. The O-Ring and washer and spring wasnt there, I think its stuck inside the carburetor. I will definitely change it and clean the carburetor thoroughly myself.

Sibun Sir what is the procedure to check the Ignition Coil under tank and Magnet coil. If it is possible I would like to do that myself because the mechanic will only crank the bike and look at the spark deeply and say SAHI HAI . They dont have any special equipments and before hand they will not even agree to check it. This type of problems are rarest of all thats why mechanics are least interested.


Pinaki Sir I do agree with you and Sibun Sir. I was thinking that after rebore my problem should have solved but because the reason that my problem didnt solve after rebore I thought that problem was not from ring piston area and thats why I started working on my bike to find out the problematic area. I will check and see what my plug cap is reading on multi meter. Spark plug is running without resistor for now and the combustion seems to have improved alot than before. Compression is also very strong felt with the kick starter. Will definitely change the air screw O-Ring and proceed further with the coil as soon as Sibun Sir responds.

This is my first encounter with Sibun Sir and I should admit I LOVE HIM.

hi all experts... please view this pic,this so called Cam chain tensioner exists in my dads splendor and also my Honda dream.
just curious what happens if we opened these 2 bolts.. Is there anything to perform maintenance on this tensioner? I heard somewhere that oil will come out if these bolts are opened.

Thanks. [ATTACH]201410[/ATTACH]

My CD Dawn is making strange noise. It seems it may have crack/hole on pipe near flange we bolt it to cylinder.

Should i weld it ? other option mechanic told to change almost 1 inch pipe with new one to make it trouble free.

Any suggestion from experts.

how can we avoid such in future ?

Might be running slightly rich. Turn AFR 1/8 turn anti-clockwise. Could you tell me which is the screw? is that same which is next to idle screw? please confirm.

picture of spark plug after a week use. (had cleaned last Saturday, 9 days back)
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Will update with sparks in tomorrow, as missed takings is pics.

Please advise how to go forward from this point and I look forward for you help as I don't wan to lose my dream bike.

Pradeep

... picture of spark plug after a week use. (had cleaned last Saturday, 9 days back)..

Plug is getting heavily fouled . I can imagine a few possibilities
a) did you let any mechanic tamper with the engine timing ? reset to factory settings from hero authorized service center .
b) adulterated fuel , dirt in fuel or fuel tank . empty tank , clean and dry , clean petcock filters . replace fuel pipe .
c) improper , worn , clogged jets and passages in the carburetor . clean it , replace the jets and air-screw with oe parts .
d) replace plug with ngk cr7hsa and plug-cap also with oe cap .