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Honda Unicorn

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  • asn39
    replied
    Re: Honda Unicorn

    Originally posted by sandeepcf View Post
    Remove the sparkplug, pour some oil, try to push start in all gears until you get the compression back.
    How in the hell did you know exact problem ! Awesome ! my mechanic did just that and he said valve must have jammed due to low temperature and non running but the oil he poured is giving me smoke he said smoke will be coming out for sometime ! Is it ok ?

    Leave a comment:


  • sandeepcf
    replied
    Re: Honda Unicorn

    Remove the sparkplug, pour some oil, try to push start in all gears until you get the compression back.

    Leave a comment:


  • SatSon
    replied
    Re: Honda Unicorn

    Originally posted by asn39 View Post
    ok chain HAS BEEN very dirty sludgy and all kind of deposits found i might just remove chain cover and use any TOOTHBRUSH

    SCARY INCIDENT HAPPENED I WAS DRIVING BIKE AS USUAL AND I PUSHED 2nd GEAR AND BIKE WENT FEW METERS AWAY AND SUDDENLY DEAD !!!
    i thought i might have not accelerated properly but that was not the case IT WENT DEAD STRAIGHT
    I TRIED KICK START BUT IT FEELS KICK BECAME LOOSE MEANS EVEN IF I SIMPLY PLACE MY FOOT ON IT KICK GOES DOWN ALL THE WAY
    I TRIED CHOCK OR POWER BUTTON START BUT JUST KEEP GIVING ME THAT STARTER SOUND BUT BIKE IS NOT STARTING

    I REQUEST YOU ALL TO PLEASE GUIDE REGARDING ISSUE I DRIVE BIKE VERY LESS BUT ON MAINTAINANCE SIDE I DONT COMPROMISE BUT YET I HAVE TO FACE SUCH ISSUE
    HOPE ITS NOT BIG ISSUE !!!

    thank you all for previous replies and future replies too
    It could be stuck valve issue, which I've read in this forum happening with Hero/Honda engines. Try cranking the engine continuously using starter when this happens.
    You may also try this tip from Sibun.

    Leave a comment:


  • asn39
    replied
    Re: Honda Unicorn

    Originally posted by SatSon View Post
    A bit of dirty chain won't cause hard gear shifts, but tight chain can.
    Check your chain slack and ensure it has enough slack as mentioned in manual.
    Check clutch setting, again, leave enough play on the gear lever as mentioned in manual.
    And, if you are revving hard in first gear, then it may result in hard/noisy gear shifts.
    Originally posted by sandeepcf View Post
    I don't know the exact reason for the hard shift.
    Service center people don't clean the chain in general service(I've never seen chain cleaning for unicorn besides waterwash).
    Why can't you clean the chain by yourself? There are a lot of threads in DIY section.

    http://www.xbhp.com/talkies/do-yours...tml#post687285
    ok chain HAS BEEN very dirty sludgy and all kind of deposits found i might just remove chain cover and use any TOOTHBRUSH

    SCARY INCIDENT HAPPENED I WAS DRIVING BIKE AS USUAL AND I PUSHED 2nd GEAR AND BIKE WENT FEW METERS AWAY AND SUDDENLY DEAD !!!
    i thought i might have not accelerated properly but that was not the case IT WENT DEAD STRAIGHT
    I TRIED KICK START BUT IT FEELS KICK BECAME LOOSE MEANS EVEN IF I SIMPLY PLACE MY FOOT ON IT KICK GOES DOWN ALL THE WAY
    I TRIED CHOCK OR POWER BUTTON START BUT JUST KEEP GIVING ME THAT STARTER SOUND BUT BIKE IS NOT STARTING

    I REQUEST YOU ALL TO PLEASE GUIDE REGARDING ISSUE I DRIVE BIKE VERY LESS BUT ON MAINTAINANCE SIDE I DONT COMPROMISE BUT YET I HAVE TO FACE SUCH ISSUE
    HOPE ITS NOT BIG ISSUE !!!

    thank you all for previous replies and future replies too

    Leave a comment:


  • SatSon
    replied
    Re: Honda Unicorn

    Originally posted by asn39 View Post
    i checked silencer thoroughly there were no deposits but mu finger got black when i inserted into silencer hopefully its normal ?
    besides yes i start the bike in enclosed area and about spark plug i shall check soon thank you

    besides my gear shifting is still hard from 1st to 2nd gear even after 2 years
    does it mean service centres never cleaned the chain ?
    A bit of dirty chain won't cause hard gear shifts, but tight chain can.
    Check your chain slack and ensure it has enough slack as mentioned in manual.
    Check clutch setting, again, leave enough play on the gear lever as mentioned in manual.
    And, if you are revving hard in first gear, then it may result in hard/noisy gear shifts.

    Leave a comment:


  • sandeepcf
    replied
    Re: Honda Unicorn

    Originally posted by asn39 View Post
    besides my gear shifting is still hard from 1st to 2nd gear even after 2 years
    does it mean service centres never cleaned the chain ?
    I don't know the exact reason for the hard shift.
    Service center people don't clean the chain in general service(I've never seen chain cleaning for unicorn besides waterwash).
    Why can't you clean the chain by yourself? There are a lot of threads in DIY section.

    Leave a comment:


  • asn39
    replied
    Re: Honda Unicorn

    Originally posted by sandeepcf View Post
    Are you starting the bike in enclosed area? If it is definitely "burning" smell take a look at the spark plug for any oil deposits, insert your finger at the silencer tip and check for gummy residue. Change the airfilter and tune the carburetor and see if the smell goes aways.Use Mobil Delvac 1300/1400 I am very much satisfied with this oil in my Unicorn.
    i checked silencer thoroughly there were no deposits but mu finger got black when i inserted into silencer hopefully its normal ?
    besides yes i start the bike in enclosed area and about spark plug i shall check soon thank you

    besides my gear shifting is still hard from 1st to 2nd gear even after 2 years
    does it mean service centres never cleaned the chain ?

    Leave a comment:


  • sandeepcf
    replied
    Re: Honda Unicorn

    Originally posted by asn39 View Post
    kind of burning mostly through silencer i only feel while i start the bile first time only i think il try changing oil first
    then oil filter and air filter also as air filter is also spoiled and i never changed oil filter before
    Are you starting the bike in enclosed area? If it is definitely "burning" smell take a look at the spark plug for any oil deposits, insert your finger at the silencer tip and check for gummy residue. Change the airfilter and tune the carburetor and see if the smell goes aways.Use Mobil Delvac 1300/1400 I am very much satisfied with this oil in my Unicorn.

    Leave a comment:


  • asn39
    replied
    Re: Honda Unicorn

    Originally posted by devils_friend View Post
    From my personal experience, the oil is good till 2k-2.2k kms.

    What smell do you get??
    kind of burning mostly through silencer i only feel while i start the bile first time only i think il try changing oil first
    then oil filter and air filter also as air filter is also spoiled and i never changed oil filter before

    Leave a comment:


  • devils_friend
    replied
    Re: Honda Unicorn

    Originally posted by asn39 View Post
    Guys i am done 1800 kms with shell ax7 oil while it was good at initial but just since last few kms ive started to feel emgine roughness and vibes between 4k to 5k rpm as i generally change gears between them this vibes are noticable in 3rd n 2nd hear and in 4th gear vibes are felt after 5k rpm

    Also while i start my bike in morning with choke i get wiered smell kind of burning

    Is oil due to be changed ?
    What about the smell ?
    From my personal experience, the oil is good till 2k-2.2k kms.

    What smell do you get??
    Last edited by devils_friend; 03-26-2015, 02:12 PM.

    Leave a comment:


  • asn39
    replied
    Re: Honda Unicorn

    Guys i am done 1800 kms with shell ax7 oil while it was good at initial but just since last few kms ive started to feel emgine roughness and vibes between 4k to 5k rpm as i generally change gears between them this vibes are noticable in 3rd n 2nd hear and in 4th gear vibes are felt after 5k rpm

    Also while i start my bike in morning with choke i get wiered smell kind of burning

    Is oil due to be changed ?
    What about the smell ?

    Leave a comment:


  • BlackPanther
    replied
    Re: Honda Unicorn

    Originally posted by Jith_in View Post
    Don't worry take it to asc. They will open the head and will send it to lathe and will insert a sleeve and fix the bolt. Not a serious issue. No part replacement is needed. It will just cost you less than 500 rs. Also while sending it to lathe ask them to insert sleeve for the other bolt also so that it won't create any problems in future. But first you should try to wrap some aluminium foil paper around the bolt threads and tight gently it may work. I am also running with this on my xtreme.
    Thank you Sir,

    I took help of my local Mechanic. In Lathe, I was charged 150 RS for both sides.

    Mechanic asked 100 RS as labor and also adjusted tappet which was making much noise.

    Now the bike is running smooth as before in the 60KMPH mark.


    Speedo @ 44444.4 KM during my travel to office on Monday. Also Completed 5 years with Unicorn.

    Click image for larger version

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    Last edited by BlackPanther; 03-25-2015, 10:34 AM.

    Leave a comment:


  • ashwanth.r
    replied
    Re: Honda Unicorn

    Originally posted by windrider007 View Post
    I recently spoke to a guy who had brought his 2006 unicorn for a complete engine rebuild. I was shocked to see the odo reading of 32k km. Upon asking him why he had needed to do an engine rebuild at such low kms, he replied that the actual reading should be 1,35,000km!!! He had run 3000km with broken speedo cable. He had also never gone for a rebore. My mind was blown as the highest odo reading I had seen on a uni was around 75k or 80k kms and even that bike had gone for a rebore at 60k kms. This guy was a medical rep and said he covered almost 150 to 200 kms a day travelling between Kochi and thrissur. He mentioned he changed the engine oil every 2000-2500km and had initially used 10w30 but started using 20w40 from past 2 years. p.s his engine rebuild cost 22k in parts and labour. Done at johns Honda, thrissur

    Thanks for sharing - I thought the 150cc from Honda is incapable for crossing 1 lac in Indian conditions (have not heard any till this one). But regular service and not-abusing can make this gem cross a lac easily . Eterno had a Honda recommended oil change interval of 3000 kms - this is an ideal change interval for mineral oils.

    And in general, the bikes that cross a lac easily on their odometers are usually the ones that have a minimum of 100-150 kms per day running, i.e., people who take them to work under highway-ish conditions. Highway running is less stressful for the bike (?) compared to constant stop-and-go city traffic. We can also observe that these mile munchers spend less on spares - for example if one uses the brake 10 times in 1 km in the city, the same is used one once every 10 kms on a free highway. The battery too is sufficiently charged to keep it ticking very long.

    Leave a comment:


  • asn39
    replied
    Re: Honda Unicorn

    Originally posted by raja1982 View Post
    Hi,

    Yes it is the same noise/engine strain and i am sure it takes out all the ...........
    ..... any tappet adjustment and was th

    Please let me know, if you have or you could solve this issue.

    Thanks
    I had a talk with a mechanic he said its a TAPPET noise and on checking oil he said it has become too thin so that might be one reason for roughness and besides HE ALSO SUGGESTED if you are not going to drive for few months don't do it now do it at later when u plan to ride regularly

    I WAS SURPRISED TO SEE THE TAPPET WORD FROM somebody locals mouth
    Anyway be patient ill be updating about issue but only after may

    Leave a comment:


  • windrider007
    replied
    Re: Honda Unicorn

    Originally posted by ashwanth.r View Post
    Just asking out of curiosity - Is there anyone who has taken the good old Unicorn/CBZ engine upto 1,00,000 kms without a rebore/cylinder head replacement (proper regular services)? I only know people who have done the same for Fieros, splendors and GS150R. If no, would the likely cause be absence of a dedicated paper oil filter/shift to 10W-30 oil by Honda? Anyway most people sell off their bikes at 60-70 kms on odometer.
    I recently spoke to a guy who had brought his 2006 unicorn for a complete engine rebuild. I was shocked to see the odo reading of 32k km. Upon asking him why he had needed to do an engine rebuild at such low kms, he replied that the actual reading should be 1,35,000km!!! He had run 3000km with broken speedo cable. He had also never gone for a rebore. My mind was blown as the highest odo reading I had seen on a uni was around 75k or 80k kms and even that bike had gone for a rebore at 60k kms. This guy was a medical rep and said he covered almost 150 to 200 kms a day travelling between Kochi and thrissur. He mentioned he changed the engine oil every 2000-2500km and had initially used 10w30 but started using 20w40 from past 2 years. p.s his engine rebuild cost 22k in parts and labour. Done at johns Honda, thrissur
    Last edited by windrider007; 03-18-2015, 10:40 PM.

    Leave a comment:

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