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Thread: Yamaha Gladiator RS 2008 not performing on top end

  1. #21
    Rusted Honda_CBF's Avatar
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    Valve adjustment is not very time taking job will take less than an hour (if nothing is stuck or wrong) but this job asks for great precision. Get it done from a good reputed mechanic.
    And manifold is the thing (channel) through where all the air/fuel goes to engine, its between air box and engine.

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    posting some pics of the spark plug as you said...

    it was cleaned yday itself so there are hardly any deposits

  3. #23
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    Well last 2 pic has more carbon deposits and electrodes tip is grey showing optimal AFR. Last pic has too much deposits, when was the last time it was cleaned? I guess these were the pics taken before cleaning. First pic is kind of unclear to make anything out, its just too clean. And second pic has got white coloured electrode, stating lean AFR.
    Your AFR setting is at 4 turns out, right? Try using little more richer setting but not more than 4.25 turns, just for time being, until you change airfilter etc.

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    Quote Originally Posted by Honda_CBF View Post
    Well last 2 pic has more carbon deposits and electrodes tip is grey showing optimal AFR. Last pic has too much deposits, when was the last time it was cleaned? I guess these were the pics taken before cleaning. First pic is kind of unclear to make anything out, its just too clean. And second pic has got white coloured electrode, stating lean AFR.
    Your AFR setting is at 4 turns out, right? Try using little more richer setting but not more than 4.25 turns, just for time being, until you change airfilter etc.
    Aiyo!!! They well all taken at the same time, yday evening!!! That too, after my plug was cleaned on Tuesday!!! Poor lighting is the culprit here

    Photo No.2 & 3 are actually closest to what it looked in reality.

    And yes, I have set it to leaner than normal - coz my bike is drinking petrol like crazy. Right now i am on 3.75 turns anti-clockwise from the closed position

  5. #25
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    Lolz.. And I was thinking how the hell this kind difference can be there.. Last pic almost looked like 2 stroke plug!!
    Anyways, whatever you do dont let it overheat you know its leaner than needed.

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    Ok, I had a minor overhaul of sorts today. Here's the log

    • Replaced that wurth engine oil with Gulf Pride 4T Plus 20W40 - Rs.230
    • Replaced stock spark plugs with NGK Iridium - Rs.550
    • Replaced air filter. Didn't find a foam type, though. Still on paper filters. - Rs.230
    • A week's supply of Shell fuel
    • AFR made slightly richer


    She's sleepin peacefully after her new diet, will take her for a spin tomorrow to check if the new diet helped her health in any way!

    BTW I was shocked at the amount of dirt & goo which I found in the flushed oil - that wurth oil was not even 500kms old!!!

    Guys, can someone post a detailed procedure on the DIY Foam-type air filters? I read the article posted in this forum, but it's lacking in details. Which grade of foam to use? how to cut it to size? How to assemble the filter back? Anyone with a small tutorial/photo feature?

  7. #27
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    Quote Originally Posted by bbsrailfan View Post
    Ok, I had a minor overhaul of sorts today. Here's the log

    • Replaced that wurth engine oil with Gulf Pride 4T Plus 20W40 - Rs.230
    • Replaced stock spark plugs with NGK Iridium - Rs.550
    • Replaced air filter. Didn't find a foam type, though. Still on paper filters. - Rs.230
    • A week's supply of Shell fuel
    • AFR made slightly richer


    She's sleepin peacefully after her new diet, will take her for a spin tomorrow to check if the new diet helped her health in any way!

    BTW I was shocked at the amount of dirt & goo which I found in the flushed oil - that wurth oil was not even 500kms old!!!

    Guys, can someone post a detailed procedure on the DIY Foam-type air filters? I read the article posted in this forum, but it's lacking in details. Which grade of foam to use? how to cut it to size? How to assemble the filter back? Anyone with a small tutorial/photo feature?
    Hello,
    From your spark plug pictures it seems like weak spark. If your problem not solved by above works, suspect your ignition coil also.
    Last edited by mrbabu76; 07-15-2012 at 09:45 AM. Reason: spelling correction

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    Quote Originally Posted by bbsrailfan View Post
    Ok, I had a minor overhaul of sorts today. Here's the log

    • Replaced that wurth engine oil with Gulf Pride 4T Plus 20W40 - Rs.230
    • Replaced stock spark plugs with NGK Iridium - Rs.550
    • Replaced air filter. Didn't find a foam type, though. Still on paper filters. - Rs.230
    • A week's supply of Shell fuel
    • AFR made slightly richer


    She's sleepin peacefully after her new diet, will take her for a spin tomorrow to check if the new diet helped her health in any way!

    Took her for a spin today. The performance had worsened.
    The engine was very rough. The bike was very stressed even at 60kph. Could hardly reach 70kph with great difficulty.
    My friend suggested changing my clutch plates - changed my clutch plates spending a thousand bucks -and still the bloody engine felt the same..I am really going mad now.


    Damn it, it vibrates real bad and cross 60kph - feels worse than an 90s' Hero Honda CD100

  9. #29
    Rusted Honda_CBF's Avatar
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    Clutch was never the culprit. Though, I'm not able to understand what's wrong with it. At first it seemed like a clogged airfilter.
    Does your bike jerks while riding?
    And what about the valve adjustment? Also try to get opinion(s) from mechanic.

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    Quote Originally Posted by Honda_CBF View Post
    Clutch was never the culprit. Though, I'm not able to understand what's wrong with it. At first it seemed like a clogged airfilter.
    Does your bike jerks while riding?
    And what about the valve adjustment? Also try to get opinion(s) from mechanic.
    @Ateesh: No jerks while riding. Just that it is very rough & vibrates a lot and feels very stressed out after 4000RPM. The exhaust note is very raspy. The mech also said that low mileage and low top speed were a clutchplate issue, but since he shut shop after delivering my bike, I couldn't go back for opinions after discovering that the issue was still present.

    Couldn't get the valve job done today, they were in a hurry to shut shop. Will revisit tomorrow.
    Last edited by bbsrailfan; 07-15-2012 at 11:16 PM.

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