Hey guyz
I've made another discovery to improve the uni's performance and this time it is a home made foam-filter for uni.
All that I did was to remove all the paper material from the original paper filter and use the remaining of the filter body to seal the unit from sucking air from any where else then through the foam filter only. I'd cut a 2 inch thick foam with 12cm by 18 cm dimensions in place of the original paper material in the paper air filter and the difference in performance was just mind-blasting. It was so mind-blasting that I doubted if it will effect the reliability of the engine. So, basically, my question is:
Is there a special type of foam used for air filters, or the ones used in sofa seats etc are also the same thing.

Make a DIY thread about it bro

Wher are all the uni owners??

i'm here only..did u get your tail lamp rectified

@honda_vings are u sure that it wil filter all the fine dust from going into the engine

Engine dies at low rpm's

Hello to all...
"I have very little knowledge on engine and associated parts"
I have a very serious problem which is taking my sleep away...My CB Unicorn is just 1.25 yr old, all these days I didn't have a single problem so to speak with my bike since the purchase.
These days(for a week now) the engine dies at low rpm's or downshifting when clutch applied.
The engine is acting very strange..
1. It starts quite fine with 1400rpm as idle till warm up when I ride it for some distance suddenly on downshifting the engine dies.
2. In certain cases it comes to nuetral quite fine but I see the idle rpm starts increasing and reaches around 3.5krpm.

I got it serviced and complained about the problem but they couldn't solve my problem and handed me a 800/- bill.
I have got the carburetor cleaned, changed the engine oil, got the electrical connections checked.

The Honda service man is telling me there could be problem with the inject valve of the carburetor.
But I don't want to believe him because the guy made a temporary fix by disconnecting the air filter tube from the carburetor.
When I pointed out the mistake after couple of days admits by saying it as temporary fix.
But when I connected the air filter tube the engine would die instantaneously even at idle.

I am not a happy man these days by just imagining all the dust that would have gone into the carburetor.

The problem started when I fueled it at a new station 150/- (Indianoil) but refueled it at a known place later.
Could it be a problem with the gas.
Help me

Thanks

yes it might be the carburettor, u can claim warranty on that. dont settle for any temporary fix. ask them to replace it! hope your bike's warranty is not void.

Thanks Fayad for the reply...My father always used to tell me that do not allow the service men to touch the carburetor...during the 4th free service the service guy said he has checked the carburetor..
Do carburetor's get damaged so early..what precautions have to be taken to maintain it in good conditions..
I will take my bike to Honda station tomorrow any advice you would like to give so that I am prepared when he is diagnosing...he said he has a spare and will replace the inject valve of the carburetor but didn't mention about the entire unit..
I have the got the extended warranty for 5yrs so should not be a problem...

if the carburettor setting is correct never touch it,your father is right..
Get the inject valve replaced and see if the problem is solved. get it done under warranty.
carburettors dont get damaged so early unless its a manufacturing defect.

Yes its fixed now, the mech put a chetak seat rubber under the reflector now its fixed i got it serviced too, cleaned the carb nd tank but still i feel a block sort of when i shift to second gear and changed my brake pads about 80km ago nd its not stopping the wheel so well, the mech says it still needs to wear a little more, isn't 80 km of wear enough?

I dont think changing airfilter to form type will make a mind blasting increase in performance.

Yeah,Post more pics and info on it.

the disk pad is just 80km old and its not stopping the wheels well? does the brake feel spongy when u apply it?

Thanks all for replying

It simply depends on the thickness and the grade of the foam you are using in place of paper air filter.

More Thickness= More filtering and restricted air flow
More Grade( i.e. More dense)= More filtering and restricted air flow

Mine (Foam) is 2 inch thick but I don't know its grade. But whatever the grade my be it has a gr8 intake capacity compared to the paper filter one.

However, now I'm using this as an add-on filter with the stock paper filter so that the air is filtered through the foam first and then by the paper filter below it. Well, I wud like to say that it gave an improved intake feel, but that's against the theorey. However, I observed that in moist climate like these days, the foam is preventing the paper filter from catching moisture and hence the improved performance is felt despite the double filters used. Now the bike feels much more active.

"Yeah,Post more pics and info on it."

I really don't think piucs will be of any further help. Simply cut the foam with dimensions similar to the paper material of the stock filter which is 12 cm by 18 cm.

Once this discovery has given some good results after testing it for some kilometers, I wud definitely create a diy thread for dis. But, right nw I guess I need to gather more thoughts about it from all u guyz. Please pour in your comments on this.

One more thing, the higher the density of the foam the harder it will be. My Foam is harder then the foam present in Honda Dio Foam-Filter, so my foam definitely filters better then the honda dio stock filter. If you would like to expeiment like me, simply refer to the honda dio filter and try to see if you could get some foam from the market.

Hi, I got my Bike checked again with the service guy..he removed the carburetor assembly completely and cleaned it.. checked all the inputs going into the carb re-adjusted the entire setting.
I have ridden the bike for some kms now, I haven't faced the problem till now..hopefully he has corrected it.
But he tells me if the problem is not solved may be we will have to change the carb and check again if the problem still persists then it could be engine problem.
Meanwhile I asked him if Carb comes under warranty he say NO whereas my warranty book lists it as Carb assembly.
Hoping for the best.

^ how is the bike now? issues got solved?

My Uni runs with 1.15 litres of Engine Oil

Happy Diwali friends.

I am using Unicorn for the past 21 months now. Covered 18890 Kms till date. No problems faced till now. Coming back to what I was about to say...

I added 150 ML of oil (Shell Advance) to the 1000 ML of existing Engine oil (The existing Oil ran for 400 KMs)

I read somewhere that excess of oil will damage the pistons. My Local Mechanic was insisting me to add 1200 ML of Oil like we do in HeroHonda Bikes. I was against it.

Just for an experiment, added 150 ML ( which was left after Engine oil change of my Streak ), and did a 200 KM round trip. The result was amazing.

Engine sounded like a bike out of showroom. Now, the synonym of Smoothness is my Unicorn...

Planning for Fork Oil replacement, Disk Pad and Disk Oil replacement at 20,000 Kms...