So I believe it should do more than 50 kmph at 4k in 5th gear.
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Re: Honda Unicorn
Shame that you didn't get an answer for 3 weeks. Although I am by no means an expert, I'm gonna give it a ry.Originally posted by RohIIT View Posti am using a donor 2009 unicorn run 25k . Only periodic services has been done and nothing else. Everything from chain to tyre is stock.
Problem 1 : Bike doesnt seem to go above 80 , need to rev real hard 6-7k each gear to get it there. Is it common for you guys too ? My xtreme (16k done) pulls to 90 in no time .
Problem 2 : Acceleration is slow , my 5th gear 4k rpm speed is 50-52kmph. So clutch seems ok to me . Chain is also correctly tensioned. Tappets also set correctly.
Problem 3 : kick starting doesnt need much effort , which makes me think does this bike suffer from compression issue ? i checked spark plug it was dry , so it comes down to valves . Does unicorn suffer from valve leakage ?
Please shed some light over my queries. Thank You
1. Yes, acceleration beyond 80 kph is terrible. Although I have done 100 kph, you need lots of time and a straight road for it.
2. Yes, when in the 5th gear at 4K RPM the speed is exactly 50kph. Normal.
3. I use the electric start 90% of the time. Are you experiencing other symptoms of a compression leak? Like loss of power? Also see if the head of the cylinder is leaking liquid. There will spots of dried liquid in that case. I have never experienced valve leakage so far(ridden 14760 kms, and quite fast riding as well.)
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Re: Honda Unicorn Dazzler
^^Thanks..
Alright. A few general questions. I did my last service at 12,007 kms. Right now I'm at 14,760 kms. When should i get the next servicing done? 15000?
And what's the oil change interval for the CB Unicorn? The manual says top up after 3K, and change after 6K kilometers. What schedule do y'all follow?
What brand of oil to use? The ASC guys use Idemitsu oil, with honda branding, touting it as "genuine Honda oil". Are there better oils available out there?Last edited by metallica84; 01-07-2016, 08:02 PM.
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Re: Honda Unicorn Dazzler
Its Secondary air injection . Same section has that textile covered pipe that goes to engine head. Its function is to reduce emission and boost mid end performance.Originally posted by metallica84 View PostThanks, can you tell me what that metal box is where the pipe originates from?
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Re: Honda Unicorn Dazzler
Thanks, can you tell me what that metal box is where the pipe originates from?Originally posted by RohIIT View PostYes this one , Remove the rubber pipe and block the metal lower pipe which is fixed to intake manifold and try again .
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Re: Honda Unicorn Dazzler
Yes this one , Remove the rubber pipe and block the metal lower pipe which is fixed to intake manifold and try again .Originally posted by metallica84 View PostOkay so, here are two pictures that I took. I have labelled the golden pipe for you. Can you tell me what that metallic box is, where the golden pipe originates from?
Sorry for the poor image quality, I took them after sunset at an outdoor area with little lighting.

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Re: Honda Unicorn Dazzler
Okay so, here are two pictures that I took. I have labelled the golden pipe for you. Can you tell me what that metallic box is, where the golden pipe originates from?
Sorry for the poor image quality, I took them after sunset at an outdoor area with little lighting.

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Re: Honda Unicorn Dazzler
Yea thats the golden pipeOriginally posted by metallica84 View PostNo I did not do that. I'm not very knowledgeable about this, so I'm kinda scared of messing things up. I just went and took a look at the carb and i saw a golden pipe coming from behind and merging into the intake between the carb and the cylinder. I saw no grey pipe.
Although the jerking appears to be gone, i feel a proper evaluation would be possible only when starting off from a cold engine. I'll ride to college tomorrow morning and then update this thread. If it still doesn't work, I'll try unplugging the pipe(btw is it grey or golden?) and closing it with my thumb, and then tune the carb.
BTW is this grey pipe you speak of, accessible from the left side(from where you access the fuel screw), or the right side of the bike(from where you access the idling screw)?
It has a pipe coming from secondary air injection .
Block either the golden pipe or pipe from secondary air injection.
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Re: Honda Unicorn Dazzler
No I did not do that. I'm not very knowledgeable about this, so I'm kinda scared of messing things up. I just went and took a look at the carb and i saw a golden pipe coming from behind and merging into the intake between the carb and the cylinder. I saw no grey pipe.Originally posted by RohIIT View PostThats good, But did you block the grey pipe going to inlet manifold ? I wrote a note there to do that , so meanwhile ride and see if jerking issue is gone , if not then Block grey pipe and try again. 1.25 turns seems little less to me as i have set to almost 2 turns for perfect working .
Although the jerking appears to be gone, i feel a proper evaluation would be possible only when starting off from a cold engine. I'll ride to college tomorrow morning and then update this thread. If it still doesn't work, I'll try unplugging the pipe(btw is it grey or golden?) and closing it with my thumb, and then tune the carb.
BTW is this grey pipe you speak of, accessible from the left side(from where you access the fuel screw), or the right side of the bike(from where you access the idling screw)?Last edited by metallica84; 01-07-2016, 05:54 PM.
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Re: Honda Unicorn Dazzler
Thats good, But did you block the grey pipe going to inlet manifold ? I wrote a note there to do that , so meanwhile ride and see if jerking issue is gone , if not then Block grey pipe and try again. 1.25 turns seems little less to me as i have set to almost 2 turns for perfect working .Originally posted by metallica84 View Posthey RohIIT:
I read this post of yours. Now, I own a CB Unicorn(not Dazzler) and I have tuned my carb according to a ********** article i found on the internet. I first started the engine and set the idle to 3.5 K. Then I closed the fuel screw to its maximum permitted limit, The RPM of the dropped. After this i started opening the screw and the RPM rose.
I the article I read, it was written that one should keep an eye on the tachometer and when the RPM becomes constant and does not fluctuate with the engine running, that it correct AFR setting. So i turned the fuel screw around 1+1/8 turn out. At this point the RPM became almost constant and the fluctuation was minor(0.1RPM)
I have left it at that. Now I'll ride to college tomorrow and only then i'll be able to tell whether the issue of cold starts and engine shutting off in traffic have been fixed or not.
Did I do it right?
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Re: Honda Unicorn Dazzler
hey RohIIT:
I read this post of yours. Now, I own a CB Unicorn(not Dazzler) and I have tuned my carb according to a ********** article i found on the internet. I first started the engine and set the idle to 3.5 K. Then I closed the fuel screw to its maximum permitted limit, The RPM of the dropped. After this i started opening the screw and the RPM rose.
I the article I read, it was written that one should keep an eye on the tachometer and when the RPM becomes constant and does not fluctuate with the engine running, that it correct AFR setting. So i turned the fuel screw around 1+1/8 turn out. At this point the RPM became almost constant and the fluctuation was minor(0.1RPM)
I have left it at that. Now I'll ride to college tomorrow and only then i'll be able to tell whether the issue of cold starts and engine shutting off in traffic have been fixed or not.
Did I do it right?
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Re: Stratring Trouble: Nearly frustrated
Mine gives 40+ for sure with no jerks or cold start issue. Dont tune AFR for FE , instead tune it perfectly . At that point you will gain max FE and max power.Originally posted by metallica84 View PostHello, I own a Unicorn and I have the exact same issue. You can try tuning the carburettor and setting up a rich mix, but your fuel efficiency will decrease. Does your problem worsen during winters?
BTW, how many kmpl does your Unicorn give right now?
----consecutive posts auto-merged-----
My cold and hot RPM is 1-1.2 and 1.8 respectively.
BTW, I have deliberately tuned my carb to give better fuel economy. This issue has gotten worse as winters have set in. I want an FE of more than 40. During summers I run on a lean mix and this behaviour doesn't happen, at the same i get an FE of 45kmpl+
Is there a way to fix this without compromising too much on the fuel economy?
And btw, i warm up the engine by running on choke for 3-4 minutes every morning, but this issue still persists.
How many kmpl does your Unicorn give you?
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http://www.xbhp.com/talkies/motorcycle-ownership-experiences/5487-honda-unicorn-303.html
Hello, I own a Unicorn and I have the exact same issue. You can try tuning the carburettor and setting up a rich mix, but your fuel efficiency will decrease. Does your problem worsen during winters?Originally posted by crazydriver View PostHi,
I have been using my dazzler for the last 5 years and for the last 1 year I am having trouble in starting up my bike after long idle(mostly in the morning and late evening when leaving from office)...
BTW, how many kmpl does your Unicorn give right now?
----consecutive posts auto-merged-----
My cold and hot RPM is 1-1.2 and 1.8 respectively.Originally posted by RohIIT View PostBefore doing this please tell me your cold and hot RPM
BTW, I have deliberately tuned my carb to give better fuel economy. This issue has gotten worse as winters have set in. I want an FE of more than 40. During summers I run on a lean mix and this behaviour doesn't happen, at the same i get an FE of 45kmpl+
Is there a way to fix this without compromising too much on the fuel economy?
And btw, i warm up the engine by running on choke for 3-4 minutes every morning, but this issue still persists.
How many kmpl does your Unicorn give you?
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Re: Honda Unicorn
i am using a donor 2009 unicorn run 25k . Only periodic services has been done and nothing else. Everything from chain to tyre is stock.
Problem 1 : Bike doesnt seem to go above 80 , need to rev real hard 6-7k each gear to get it there. Is it common for you guys too ? My xtreme (16k done) pulls to 90 in no time .
Problem 2 : Acceleration is slow , my 5th gear 4k rpm speed is 50-52kmph. So clutch seems ok to me . Chain is also correctly tensioned. Tappets also set correctly.
Problem 3 : kick starting doesnt need much effort , which makes me think does this bike suffer from compression issue ? i checked spark plug it was dry , so it comes down to valves . Does unicorn suffer from valve leakage ?
Please shed some light over my queries. Thank You
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Re: Honda Unicorn
^^ iam using tubless(rear), its available for front tyre too, zapper FS has tube and tubeless variants. Just you have to buy an additional valve costing ~100 bucks.
Does anyone know the rear tyre pressure for tubeless (zapper vyde) (size and all same as stock)Last edited by mid; 12-10-2015, 07:09 PM.
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