Re: Honda Unicorn

which is the engine oil for unicorn , done 70000kms odo

please suggest me a full synthetic oil from below

Shell Advance Ultra 10w-40 = 700/-

Mobil 1 10W-40 = 800/-

Motul 10w-40 = 950/-

Honda Throttle 10w-30 = 506/-

Re: Honda Unicorn

Motul 300v and shell are good, also u can try Motul 7100

Re: Honda Unicorn

Facing the same problem but mine is an old bike. . . It could be for the following reasons,
1. Get your carb cleaned.
2. Check if the diaphragm and the pin (don't no the name exactly but it comes as a set with the diaphragm) is good or not, if it's not then replace it. . .
3. See if the air screw has been blocked while cleaning the carb. . .

This was the diagnosis made by the SVC guy, . . I am yet to leave it to my mechanic in some days. . .

Cheers!!!

Re: Honda Unicorn

This may sound weird but it actually worked out for me.

There was a lot of issues with Idling. Bike would refuse to start in first kick. Should use the Choke always for past few thousand Kms.

Acceleration will not be gradual. There would be hicckups and engine would feel like it is out of fuel even when tank is full

I know this is the time to clean the carb. But I dont want to mess with the tuning as Mileage was good.

This is what I did.

drove till there was around 2 litres of Petrol in the entire tank.

Keep the fuel knob to reserve.

Drain tube from carb was put to a 2.25Ltrs softdrinks bottle.

Loosened the carb drain nut.

Fuel started flowing into the bottle from the carb for next 5-10 minutes. I left it till the last drop from carb came out. (But there was still few petrol left in Tank)

I could see something like water mixed in the petrol. This free flow must have removed all the dust in the Carb.

Now i left the carb to dry for a day. Actually got busy with some work.

tightened the nut. Poured fresh petrol from Bunk and WOW.

Bike started in First kick. Idling was good at 1000RPM.

Things back to Normal. Saved me rs 100 for carb cleaning.

You may give a try. It is not going to harm you. Make sure you tighten the petrol drain nut in the carb.


You may question that what did you do with the 2 ltr of dirty pertol.. Well, i added some 2t oil to it and poured into our 15+year old TVS 50

Re: Honda Unicorn

@BlackPanther I have heard of this and previously was given this idea by mechanic too when my bike suddenly happened to do hiccups in the middle of nowhere, almost 10kms away from any near mechanic shops, so that's what the advice he gave me. . . But the thing he said was, "turn off the petrol flow and then with the help of a screw driver, open the drain tap, allow it to drain the excess petrol mixed with dirt that is in there and then tighten it and turn it on and start the bike, it will start". . .

Cheers!!!

Re: Honda Unicorn

Cleaning carb doesn't alter the tuning so its ok to do it.

Re: Honda Unicorn

Rakesh what happened bout ur front disk plan for your bike?

Re: Honda Unicorn

That's just keeping aside bro, cos saving that to buy a good phone now , but got a new problem now . . . The bike is jerking off too much now, . . Last time had this problem and got the diaphragm changed, after that had a ride to Bangalore last weekend, came here and the bike was kinda ok with the new one, but I could feel it wasn't fully breathing cos it was taking some time to touch 90kmph on the way to Bangalore. . . I was like okay with it and while coming back had a good ride till Maddur CCD, took one hour from Bangalore to reach there, (you can imagine what speed I came while back) and gave a stop there for an hour and then started, again the bike started to show the same problem, it stars, goes but does not go above 6k rpm or 60kmph, next day took it to the mechanic and he opened the carburetor to find that the diaphragm had come out of its place for my riding style. He again fitted it and again, again it was like okay and then after a day, I started feeling this strange behavior which I noticed, the bike takes little time for first start, after it starts and I put a gear, the rpm needle goes from 1.5 rpm to 2.5 rpm, falls down to 1.5 rpm and starts raising back again. . . What do you think this might be. . ? At first I thought this might be due to the new diaphragm and then thought it may be due to wrong mixture but the problem still is persisting, don't know exactly what's wrong with it, just showed it to the ASC, there they said we should do a whole diaphragm set changed this time, I didn't leave it there as it's not so trust worthy they don't have good customer support there, so just riding like that. . . Hope it's a small issue and gets solved soon. . .

Cheers!!!

Re: Honda Unicorn

Its better to do a set change than change only the diaphragm, but before doing that get the carb checked thoroughly if it really needs it

Re: Honda Unicorn

Ok bro, will just have to leave the bike next week for that. . . He also said the same, leave the bike for one complete day and I will observe and see what is wrong with it. . . I just hope it gets solved soon and doesn't be too costly. . .

Cheers!!!

Re: Honda Unicorn

Get stuff like this done at the ASC itself, and do let me know how the bike is after that.

Re: Honda Unicorn

Mmmmmh that's what I am thinking but I don't trust the ASC guys so much, so that's why planning to leave it with my mechanic itself, let's see how it goes. . .

Cheers!!!

Re: Honda Unicorn

If ur doing that then better buy parts urself from the ASC, coz there are many fake parts in regular spare part shops.

Re: Honda Unicorn

Again a thing of concern , let me see if possible will leave it to the ASC only this time, will see if any good person I can find and hand over my bike to him so that they don't mess my bike or else will leave it to my mechanic itself. . .

Cheers!!!

Re: Honda Unicorn

Guys.......Honda Unicorn 4 months 1000 kms 2 services done

Of late my Self-Start does not work sometimes....what should I do??...and when I decide to take it to Service Center it works Flawlessly.Please help guys.........