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  1. Z

    Ton up SR250: 100mph, 100kg, 30hp

    For me, that is "raggedy" enough. Plus you can polish/re-paint later if you change your mind.
  2. Z

    Ton up SR250: 100mph, 100kg, 30hp

    POR-15 is good stuff!
  3. Z

    Ton up SR250: 100mph, 100kg, 30hp

    They have several interesting products under their Professional and Industrial tabs (but not sure about availability outside the USA): https://www.rustoleum.com/
  4. Z

    Ton up SR250: 100mph, 100kg, 30hp

    Magnetized sump plug is cool! No other convenient place to strap or epoxy a magnet since the whole bottom of the plug is the installation nut and the oil filter is internal. Neat that you can see how the sump plug/screen actually fit in the case!
  5. Z

    Ton up SR250: 100mph, 100kg, 30hp

    I guess I'm missing the point of the turn signal adapters. Are they not threaded, hollow mounts? Then they should be able to be used with either a washer on the inside and outside of the headlight bucket (but you need to "play" with the alignment), or a short (just enough material for the...
  6. Z

    Ton up SR250: 100mph, 100kg, 30hp

    I originally had one of those "bridge" pullers too. Saw the video results of the "slide hammer" tool and got one of those instead (why I recommended it a while back). Better control over force applied, not limited to what structure the "bridge" rests on, etc. Yes, a plastic body putty spreading...
  7. Z

    1980 KZ250 Cafe Build

    As the bike moves (and starts to rev), more vibrations occur which probably started shaking the ground wire which might be why it seemed to run ok at idle. Multiple carb cleanings do not hurt. Now you need to set the mixture jet and idle speed.
  8. Z

    Ton up SR250: 100mph, 100kg, 30hp

    Interested in performance/operation comparison of front disk on "daily rider" vs front drum brake. I assume its from a Virago (or maybe just a newer SR250 that did not come to the USA)?
  9. Z

    Ton up SR250: 100mph, 100kg, 30hp

    I know that the XS650 originally came with plastic bushings in the swingarm and Mike's XS has sold quite a few bronze replacement kits.
  10. Z

    Ton up SR250: 100mph, 100kg, 30hp

    Right - except that vacuum is only present in the crankcase when the piston is moving upward; otherwise it is a series of push-pull movements which is the windage loss described. My previous suggestion was to use a 1-way Krankvent (used by the H-D crowd for the same reason) in the OEM line going...
  11. Z

    Ton up SR250: 100mph, 100kg, 30hp

    I had heard of exhaust-induced depressurization before but I don't see the benefit (vs cost/complexity) of using this system over the intake-induced depressurization 1-way valve I mentioned much earlier. Any references speak to both and cite the reasons for the preference?
  12. Z

    XT600 cafe before and after

    Nice work! I assume this is an oil-in-frame XT600. If so, how difficult was it to mount the TX500 tank with the oil return fitting near the mounts? Also, are the Keihin 31mm carbs off a Kaw EX250 or separate?
  13. Z

    Ton up SR250: 100mph, 100kg, 30hp

    Just curious - what are the spring rate measurement values?
  14. Z

    Ton up SR250: 100mph, 100kg, 30hp

    Foot position you are exploring is way to tight for me, but I really like the upswept exhaust adapter idea! Gives the ability to clamp the exhaust way after the stock foot peg, improves the look a whole lot, and improves ground clearance.
  15. Z

    Ton up SR250: 100mph, 100kg, 30hp

    I tried a very similar hot-glue-gun-bridge device (Ding King brand) and it was so-so. Am following a guy on YouTube (Sweet Project Cars) and he had a couple episodes on using a slide hammer with hot-glue plastic pads. Was so impressed I got a set, but have not gotten around to using it. Many of...
  16. Z

    Wheel trueing in SEPA?

    Have only seen him advertise but you could try Locust Grove Restoration, 236 Locust Grove Rd. (splits off South Second St.), Bainbridge, PA. He does pre-1975 European bike restorations. You could also try contacting some places that deal primarily with off-road bikes to see who they use. Also a...
  17. Z

    Ton up SR250: 100mph, 100kg, 30hp

    When I was 165lbs I was around 13 years-old. Of course when I was in 6th grade I was the tallest person there - including the teachers and principals.
  18. Z

    Ton up SR250: 100mph, 100kg, 30hp

    You are correct of course - it is the reason that adding preload helps to hold up more load weight. But at the cost of suspension travel. I would be looking for the same travel but able to hold a (I suspect much) higher load weight without additional preload.
  19. Z

    Ton up SR250: 100mph, 100kg, 30hp

    Because the original springs (both front and rear) were specified as such to support a rider/passenger of a specific weight. If your projected load is not fairly aligned with that design parameter, then it will not matter much how much preload you introduce (until you fully compress the spring)...
  20. Z

    Ton up SR250: 100mph, 100kg, 30hp

    Very interesting work! I did read that the CB400F/360 fork springs may need to be cut (that's if they do fit in the SR250 tubes) so your cut spring adapter may come in real handy. Much easier than trying to grind off the cut end.
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