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Thread: Honda Unicorn

  1. #2791
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    Default Re: Help with CB Unicorn Rear Bumps Problem

    Quote Originally Posted by sinnerz2000 View Post
    Set the suspension to soft and see if it helps. How old is the bike?

    Sent from my A7+ using Tapatalk 2
    My bike is 3 years old with 23000 km . Had tried with full soft and even hard setting. Full soft makes the ride bouncy but bumps continue. Tightening the chain( very tight ) helps for very short time.

  2. #2792
    Rusted Pinaki's Avatar
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    Default Re: Help with CB Unicorn Rear Bumps Problem

    Check if the rear wheel cush-drive is ok . Those are the rubber blocks inside the rear wheel . Never tighten the chain like that , ever - problem shall aggravate . Maintain chain lubricated , with an inch of up-down slack at the middle of the bottom run . Wheel rim , tyres and tyre pressure is ok ?

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    Default Re: Help with CB Unicorn Rear Bumps Problem

    Quote Originally Posted by Pinaki View Post
    Check if the rear wheel cush-drive is ok . Those are the rubber blocks inside the rear wheel . Never tighten the chain like that , ever - problem shall aggravate . Maintain chain lubricated , with an inch of up-down slack at the middle of the bottom run . Wheel rim , tyres and tyre pressure is ok ?
    Thanks for Reply..
    One of mechanic did check that and replaced one pair of rubber block as their joint was broken but it didn't help..never checked the rim..
    will check that...An Experienced guy told to me to check Swing arm over Phone..Dont Know whts that..

  4. #2794
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    Default Re: Help with CB Unicorn Rear Bumps Problem

    Quote Originally Posted by Nilesh Hiremath View Post
    Thanks for Reply..
    One of mechanic did check that and replaced one pair of rubber block as their joint was broken but it didn't help..never checked the rim..
    will check that...An Experienced guy told to me to check Swing arm over Phone..Dont Know whts that..
    Swing arm the only problem you could face is worn out bushes or bent swingarm but both these issues wouldn't cause a bumpy ride, just a wobbly rear tyre

    Sent from my A7+ using Tapatalk 2

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    Default Re: Help with CB Unicorn Rear Bumps Problem

    Quote Originally Posted by sinnerz2000 View Post
    Swing arm the only problem you could face is worn out bushes or bent swingarm but both these issues wouldn't cause a bumpy ride, just a wobbly rear tyre

    Sent from my A7+ using Tapatalk 2
    Thanks..
    Will check if that helps..

  6. #2796
    s1d
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    Default Re: Help with CB Unicorn Rear Bumps Problem

    Quote Originally Posted by Nilesh Hiremath View Post
    My bike is 3 years old with 23000 km . Had tried with full soft and even hard setting. Full soft makes the ride bouncy but bumps continue. Tightening the chain( very tight ) helps for very short time.
    What is the condition of the tires and what tire pressure do you maintain ?
    Never set the chain very tight, it needs to have around 1-2inch slack - pls get it set correctly and ensure the notches on either side of the swing arm are at the same position after adjusting the chain.
    I think there may be a rubber bush at the mono-shock mounting , try replacing that.

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    Default Re: Help with CB Unicorn Rear Bumps Problem

    Quote Originally Posted by s1d View Post
    What is the condition of the tires and what tire pressure do you maintain ?
    Never set the chain very tight, it needs to have around 1-2inch slack - pls get it set correctly and ensure the notches on either side of the swing arm are at the same position after adjusting the chain.
    I think there may be a rubber bush at the mono-shock mounting , try replacing that.
    Thanks for suggestion..
    Will check that and see if it works..

  8. #2798
    Rookie monisab2003's Avatar
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    Default Re: Help with CB Unicorn Rear Bumps Problem

    Guys. I own a 2008 Unicorn and it has run close to 21 K. Its front suspension feels dampened on most of the conditions and even on pliant roads, i could feel the slightest undulations on the handle bars. I feel like the front suspension works only when i pass on big potholes. This issue basically started when i replaced the oil seal a month ago from a local shop. Though the service guy did a nice job on replacing the oil seals with Honda specified oil quantity (165 ml), i believe he has installed the fork spring wrongly (wider Diameter of tapered spring is now at the bottom in both the forks). Do you guys think this problem can be resolved if i re-install the springs upside down? I have read the same in many of the DIY postings.

    Also, i have used Motul 20W fork oil during oil change. The dampened effect could be because of this relatively heavy oil? I don't know the grade recommended by Honda for unicorn.

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    Default Re: Honda Unicorn

    Honda oem fork oil is 10w. Since you have used 20w oil 155-160 ml is only requird. A little variation in oil quantity will result in hard or soft shocks.

    Tapatalked from my Canvas A76
    Off the BOTTLE & On the THROTTLE

  10. #2800
    Rookie monisab2003's Avatar
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    Default Re: Honda Unicorn

    Quote Originally Posted by Jith_in View Post
    Honda oem fork oil is 10w. Since you have used 20w oil 155-160 ml is only requird. A little variation in oil quantity will result in hard or soft shocks.

    Tapatalked from my Canvas A76
    Thanks for the reply. With 20W oil, will i get the same effectiveness as that of original grade if i maintain the oil level between 155-160 ml?

    On the other hand if i need to go with 10W oil, is it simple to replace the fork oil alone? I am usually a DIY guy and would be great if you / some one could tell me the oil change procedure. I went to shop last time since i had to replace fork seals as well.
    Last edited by monisab2003; 09-01-2014 at 07:03 PM.

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