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BROS acting up.

  • 05-07-2008 5:11pm
    #1
    Ronan3345
    Closed Accounts Posts: 43 ✭


    I've had an 88 Bros for a few weeks now, really clean with 50k on it. It's been running perfectly except for a bit of a clunk when shifting, opening and closing the throttle. I reckon thats just the cush rubbers need replacing, i'll sort that soon.
    Anyway, on my way to work this mornin, stopped at the lights, it cut out on me. First time this happened and the bike was warmed up. When i started it and pulled off it was misfiring (i think, i'm fairly new to bikes and engines in general), The revs were high but power was up and down, especially in 1st & 2nd gear.
    Any Bros heads wanna hazzard a guess at this one?
    I'm gonna bring it back to the dealer but I really cant afford to be without it for the next 2 days and I wanna learn how to diagnose these things.
    Would I be doin any harm by driving it in this state, maybe giving it a bit o choke now and then?

    Cheers


Comments

  • #2
    Hotblack Desiato
    Registered Users, Registered Users 2 Posts: 35,454 ✭✭✭✭Hotblack Desiato


    Sounds like a cylinder cutting in and out.
    Almost always electrical and a fault on the high tension side.
    The first step would be to change the spark plugs and see if that cures it.
    Then check the HT leads and plug caps
    After that, connections to the coils, and the coils themselves.

    Does this happen only in wet weather - could be spray hitting the front cylinder's spark plug. Common on SV650s although the front cylinder is a lot more exposed on that bike.
    Might be worth getting a front mudguard extender, anyway.

    Scrap the cap!



  • #3
    Run_to_da_hills
    Closed Accounts Posts: 20,009 ✭✭✭✭Run_to_da_hills


    I have two of these bikes and one previous, the fuel pumps are notorious for giving trouble and packing in. There is a mechanic in Harold’s X who is an expert on these bikes and has a fast turn around as he deals with Couriers.(Stephen from former Megabikes) Fuel pumps are not cheap, Genuine about 250 and spurious about half that.


  • #4
    Ronan3345
    Closed Accounts Posts: 43 ✭Ronan3345


    cheers lads. Cleaned the carbs and replaced the air filter (well overdue by the looks of it). it's running fine now. I also changed the cush drive rubbers, this had a huge effect on the whole feel of the bike.
    Hopefully it's problem solved.


  • #5
    Magown3
    Registered Users, Registered Users 2 Posts: 702 ✭✭✭Magown3


    What are cush drive rubbers?

    Can you take a pick and circle them?


    Please :D


  • #6
    Ronan3345
    Closed Accounts Posts: 43 ✭Ronan3345


    Sorry Magown, I've no camera.

    Cush drive rubbers are to absorb some of the force on the back wheel when the throttle is applied. Check it on google, I know fireblades and Bros's have them, not too sure what other bikes have.


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