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  1. Y

    Powerdynamo / PMA

    Hi Does anyone used a lithium battery on a powerdynamo system or on a PMA? A guy told me I can't use them because lithium batteries cannot accept overcharge. (Yamaha XS650 1979 bobber) Thanks Yiorgos
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    XS performance muffler

    Does anyone have any experience with those mufflers: https://www.heidentuning.com/images/stories/virtuemart/product/2565.jpg Description ID 45 mm, ~395mm long, w/o end cap Adjustable Dyno tuned baffel. All mechanical design (No glass pack). End cone fastened with 3 screws. Classic design, nice...
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    Mufflers

    Hi all I have a xs650 79'. She's a bobber. I have pipes with baffles inside. Recently I remove the baffles and she gave me some extra torque and power which I really liked. Of course when I hit 70 miles was choking (meaning some rejet must be done - cars bs38). I want tokeep that extra power...
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    More Speed

    Hi all I own a XS650 79' for a couple of years now. It's a hardtail and my top speed is 83MPH with a lot of vibrations especially at top speeds. I know it's a small engine but i also read for XS650 going at 100mph and even more. It has an alternator system from heiden tuning - still running...
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