Thanks for the immediate reply. My answers as below.

What is Km on ODO..
47k kms

did you add Boric Acid in to petrol or engine oil...was the engine oil new when you did it,
I added 20gms of pharma grade boric acid to 50ml of acetone to make a paste then mixed this thoroughly with 200ml of new engine oil. Added the mix to rest of the new oil which went in my bike
and did you drive for 50 Kms non stop ,soon as you added the mix ?
I drove for around 35kms non-stop revving high on few occasions

Please check engine oil level...
Will check n let u know

what you report seem like poor petrol flow ..can trouble shoot when you give reply to each of my query .

I did not recommend mixing Boric ACID with Acetone as it then becomes a paste and will not remain suspended like in oil, and for the same reason asked members not to use in Petrol also since it will get blocked as a paste in the filters......View my previous post with Picture of Boric Acid with Castrol 2T oil...Acetone reacts with oil seals and rubber parts ., esp., at mix level of ..of 50ml..in 1 liter oil...I hope the paste like structure had not blocked piston's oil holes, leading to poor oil coating between bore and piston..

If bike continues to be like this then take it to a mechanic and see if petrol from petrol tap is flowing properly,and if so, drain engine oil and see color and look for contaminants / Boric acid in lumps....fill with NEW 1 L of 10w30 oil and start and idle bike for 15minutes and observe...hope this will clear the problem....

Somewhere in the thread it the method was explained which talked abt mixing boric acid with acetone before mixing with oil.

For this i also checked with u where to get boric acid in chennai and u replied too (ur post #98). I guess that was an over-sight sort of thing



Also lately i was not following this thread so missed out ur post with pics wid 2T oil. Had bought acid, acetone and 4T oil sometime back and did the treatment only 2 weeks back due to work load.

As for this treatment I did ensure that the boric acid + acetone paste mix well with oil. I saw the particles suspended in oil without any lumps or inconsistencies. Was that sufficient?

Also i have actually used only around 20ml of acetone for the paste. Confirmed that from the bottle which is of 35ml and i have still around 1/4th left over.

I have checked the petrol flow in morning itself and was fine. Will take the bike to mech tomo to check the engine oil and post.

Thanks again for patiently replying to my posts.

Still sorry to note the problems you are facing...I would like to first of all help you with the present issue ...and understand the reason for it.In fact I had used Boric Acid in my car and ZMA with old oils also and not so well mixed like what you have done,so that I will know of the variables before suggesting it...at no time did I or any one , faced the problems you are now seeing...Let us hope for an early easy solution..
Wish you well.

psr sir,

I went to the mech today n he opened the air filter and started the engine. There was white smoke coming out from air inlet. He said the engine has seized n needs re-boring and other stuffs.

I did not try to drain out the engine oil and check though. Shuld this b also done to see if works fine with new oil.

I think now i have to go for engine restoration

White smoke from Air inlet shows Back firing and happens if the AFR is lean or Valve seating has problems due to carbon deposits...It had happened to another CBZ owner at much less Kms in Vellore ,and the Valves and valve seats were redone and bike was ok
If you drain the oil and see for contaminants and clogged Boric acid lumps at least you will know what had happened...if the bore had seized then the oil would be black,and smell of burnt oil..
You can see from the oil dipstick the color of oil ...

if the bore had seized then the oil would be black,and smell of burnt oil..
You can see from the oil dipstick the color of oil ...

but psr sir,give me some light.oil changes colour even after few km of riding depending upon the oil,and it also gives smell of burnt oil.
as far as boric acid is concerned.i ground it to make fine powder and then put directley into oil chamber since circulation would mix it well.engine is smooth,throttle response is better,average is improved by 5km/lit.

i do not think boric acid will cause engine seizure when our engine can bear indian oil and fuel(you know what i mean).boric acid can do no harm

Engine oil will become dark only if it gets contaminated with blowby gasses ie., the burnt gases escaping through the rings into the chamber below...A good engine will have less blowby since it's piston rings will have good sealing.Thin oil gives less Bore to Piston Rings sealing compared to a thicker oil.
Yes I am aware that Boric Acid doesn't cause seizure...but @Nirvaana is facing a problem and I am trying my best to troubleshoot and solve it...I had used Boric Acid in various bikes , & cars without any incident.What works for me need not work for others..
Like you said I have seen only positives, like improved mileage and compression..makes the engine feel smooth etc.,..But @Nirvaana had first dissolved the boric acid in Acetone ,into a paste then added it to the engine oil....If boric acid had remained as lumpy paste then there is a chance of it plugging the oil holes in Piston....Though this is theory I want to rule it out,and warn future users..From his account it seems that the valves are not closing shut fully,as he reports back firing through air inlet..It could be carbon deposit in the bore, valves & valve seats giving this problem since the bike had done 43 K Kms...
All this apart, @ Nirvaana has a problem and I am trying to understand and solve it..

thank for your reply.
by getting compression checked he can verify if there is big amount of carbon in engine in that case comperssion will be more.but he is not telling the issue he was having with his bike before adding boric acid.

Yes , and compression can become bad if carbon particles deposit between the valve and valve seat, or if valve seats become burnt or corroded,or Piston ring is worn or frozen stuck, or the usual worn bore and piston....Only by physically opening the engine head anything can be ascertained..

Well, PSR sir, it did work for me, and that too, very well. Will be doing it again at my next oil change since I have got my engine flushed at 28k kms.

Thanks for posting your result, and Good Luck..

last time i added 10gm of boric acid.so today i put the 10gm more went for 30 km city drive(stop and go).Cylinder kit is due for replacement.i will keep updating how long B.A. can delay that.from the current perfomance i think it will easily cross the 5000 km more.
i want suggestion from the fellow member regarding adding it to fuel.exhaust is emmiting carbon to cure it i want to add in the fuel.

ya.. B.A. Can delay your engine work easily upto 5k kms. But dont bother to use it with fuel because usable quantity is very less (that too after mixing with acetone completely, 5grams in 15ml of acetone;as we know B.A. Doesn't mix with petrol)

Do not try with petrol as it will get deposited in the filter in the petrol tap and leading to zero flow...if it passes this also , it will settle into the bottom of Carburettor petrol bowl and may block Jets..
When Boric Acid is added to the engine oil,... the moving parts, and heat keeps it mixed with the oil, but even then on a new application a 50 Kms ride is recommended to ensure that the sediment of Boric Acid does not happen and it is allowed to mix well in engine oil.