Re: Honda CB Unicorn power problem

Query Approved

Just a little thought from my side, first off, never ride the bike in high gear at low speeds and then gun the throttle. In any bike the lower gears are there to give the bike enough momentum and then shift to higher gears for good top speed.

Try shifting at a 6500 to 7000 RPM from 3rd gear and above and see how it fares. Also never redline the engine in 1st and 2nd they are there to give you the intial torque momentum and after third you can safely reach the limit.

Cheers!
VJ

Re: Honda CB Unicorn power problem

Firstly welcome to Xbhp. . .

Now coming to your problem,
1. If the bike isn't going beyond 60 kph, then that's a fault with the diaphragm rubber. . .
2. Bike doesn't accelerate properly might also be due to other things, lose chain, low tire pressure, etc., get those all checked. . .
3. Vibrations aren't supposed to be coming at that low speed IMO, never ridden the latest Unicorn but I don't find vibrations at that low speed. . .
4. As said by the Mod above, never redline in first two gears, start redlining after 3rd gear. . .
5. Are the vibrations too much or just minor. . ? If it's too much then you gotta show it to the SVC and as your bike is under warranty, you'll get almost everything done free of cost. . .
6. I don't know exactly about the maximum speeds in each gears but mine's a bit tuned for more power and better acceleration compared to stock unicorn and mine can reach around 80 or so kph at redline. . . Stock unicorn comes with a top speed of 101 kph in normal road and up to 105-107 in slope. . . Mine's on the other side has a top end of 115-119 kph. . .

Cheers!!!

Re: Honda CB Unicorn power problem

Hi again,

Firstly, thanks for all the helpful tips. I've been incorporating the gear shifting tips from the Mod as well as my friends and issue seems to have solved somewhat. A little more riding and exploring later... there's still one bother and I'll try to be as specific as I can with it this time:

The third gear is something I use the most while negotiating the city traffic and cruising along, and the bike moves fine until it hits speeds of 40 kmph. Once the needle has crossed this (specifically around 44-45) I start getting an audible ringing sound (the sound is actually closer to a flute if I had to narrow it down) and it only gets louder if I try to give it more throttle (all of this on the 3rd gear). At this point, I either move to a higher gear or simply slow down.

Up until now, I thought this strange sound is probably an indication that the bike can go no more at the current gear and I've to move upwards. But another incident just this morning got me thinking...

As usual I moved up from the 3rd gear to the 4th once the bike was beyond 40, but seconds later as soon as the needle crossed 50, the ringing sound was back and I couldn't believe this happened. I stopped gunning the throttle for a couple of seconds and tried again without any gear changes. This time, the bike raced ahead beyond 60 with no problems.

So, to sum up my questions:

Is it normal to get the above ringing sound under the circumstances mentioned?

If not, what could be the possible causes for this?

I wasn't able to notice the rpm numbers when this happened. Will keep an eye on it as well.

I know it's a pretty long description of the problem. Thanks again for taking the time!

Re: Honda CB Unicorn power problem

Sir about that not redlining in 1,2 gear. ..should I follow that in my 200ns. .? As I always redline in 1 gear.

Hello all ;-)

Re: Honda CB Unicorn power problem

The thing is, why do you have to red line ?
We don't get the max power at red line. Its well before that. Also, you would be causing harm to the engine by doing this often. If you want to stay in the power zone, shift at 6-7k rpm and the bike would be much happy.

Re: Honda CB Unicorn power problem

Yes around 8.5 k rpm to be precise, that's the rpm band for which I spend 1L₹ . ,below 5-6k rpm, it's just like those 150CC bikes, sounds like them, throttle to 7.5k rpm+ BanG booM woo,you get pasia vasooled.

Hello all ;-)

Re: Honda CB Unicorn power problem

Yea, I was saying by experience of a 150cc engine
Then change at 8k rpm.. Redling is good once in a while, but on daily basis. Naa..

Re: Honda CB Unicorn power problem

In my case, I dumped Run in at exact 700kms, from then, I've been shifting-riding above 8k rpms constantly and now at 3k km on odo, never felt like p150,180,220 engines. Man I'm in love.
By the way sir, if I continue to ride like this, which things will go kaput. .? My run is not that much, I ride like 3-5kms per day (3k kms in 8months) ,and if you know, can you mention their indicating prices. .?(I know clutch plates will go off sure)

Hello all ;-)

Re: Honda CB Unicorn power problem

Not sure of what might go kaput, parts won't fail unless driven badly for a very long time. Just the wear rate of the parts will increase. Change the oil regularly and enjoy the ride
You don't ride much, so ride as you wish.

and i am no sir Just a noob here.

Re: Honda CB Unicorn power problem

a lesser noob than me
Well currently on motul 3100 20w50 ,had brought it with my friend and must say bike loved it. Only problem is,gears now feels that they have become more taller than normal, don't know why but I hate it ad I have to shift a lot, I wish my ns can have a shorter gearing like r15

Shaeed~E~Azam Bhagat Singh Ji.