Workshop

  • Yamaha RD350LC YPVS 31K

    Yamaha RD350LC YPVS 31K

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    Q: Do you know anyone who can check or test CDI units? And what are the obvious symptoms if a CDI unit is faulty? A: The usual symptom for a faulty CDI unit is no sparks at all, as opposed to occasional sparks or sparks at the wrong time. Other components in the system include…

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  • Cagiva River

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    Q: Can anyone help me? Do you know what other starter motor will fit this machine as I cannot get one and I’ve tried everywhere. A: This is a Mitsuba motor, identified as 36496 on the outside I believe, though I do not think that is a code used by Mitsuba. You could try to…

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  • Suzuki Burgman 650AN

    Suzuki Burgman 650AN

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    Q: With a cold engine it doesn’t respond to quick throttle openings. There is a bit of a difference once the engine is warm-though from about 55mph upwards, when the throttle is open to accelerate, the bike starts to chug and miss. If the throttle is held open to hold speed to 55-60 after about…

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  • Five minute fix – Wheel spindles

    Five minute fix – Wheel spindles

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    Whenever you replace a wheel spindle make sure it’s greased. As Japanese bikes rarely received lubrication to their axles when new they have a real propensity to corrosion weld themselves to the inner bearing race. Removing a seized spindle is time consuming at best and at worse may even see the forks or swinging arm…

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  • Forks

    Forks

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    Q: Just to say how much I enjoyed the ‘Why forks fail’, article, but surely the primary cause of forks ending up needing repair work is, in my experience, accidental damage. So, the difficult and awkward questions went unasked, questions like: A) Is it okay to straighten fork tubes? (and they ‘always’ get bent when…

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  • Mark’s Top tips – Engines

    Mark’s Top tips – Engines

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    1 When separating major engine components, a tap with a soft hammer helps to release the bond between them. If that does not work, don’t automatically use a bigger hammer: you have undone all the nuts and bolts haven’t you? Some are carefully hidden by the designer, just in case! 2 When rebuilding an engine…

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  • 1980 Kawasaki Z7650/750

    1980 Kawasaki Z7650/750

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    Q: Hello, I’d appreciate your opinion on the need for coil replacement on my Z650 F1. I’ve recently fitted a Z750E1 engine into my Z650 frame, The bike is running fine but I’m wondering if I should uprate the original Z650 coils (points ignition) to new Z750 coils which are electronic ignition as standard. Would…

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  • 2012 Yamaha Raider

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    Q: I ran across CMM in a forum and like a parent with a poorly child I turn to you in hopes of saving my nearly-new bike. Don’t ignore me just as it’s ‘new’. I planned some mods to my Raider: Cobra Dragsters exhaust pipes with Big City Thunder ‘monster baffles’ and I installed a…

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  • Honda GL1100

    Honda GL1100

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    Q: Hi, I am rebuilding a GL1100 GoldWing it has been stood since 1989 and it is fitted with a Pantera fairing, which I would like to keep on for the period look. Would you know who could make a copy of the screen as the one I have is cracked but complete so it…

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  • Five minute fix – Cleaning

    Five minute fix – Cleaning

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    Go to check/replace your front sprocket, grease the clutch push rod, inspect generator wiring etc. and you’re normally faced with something that looks like valve grinding paste lovingly mixed with a cow pat. And that’s pretty much what it is. Apart from making access difficult and unpleasant there’s a real chance this nasty concoction will…

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