GR650 Street Tracker Redux

Discussion in 'Old's Cool' started by Pablo83, Sep 4, 2012.

  1. HapHazard

    HapHazard Waiting for Gudenov

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    2,370
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    Central CT
    Nice job! Purdy welds, too!:thumb
    #81
  2. Pablo83

    Pablo83 Sleep, Wrench, Ride

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    I took the GR on the Elephant Ride this year. It was a blast.

    [​IMG]

    <iframe width="560" height="315" src="http://www.youtube.com/embed/hT5v9DBTm3c" frameborder="0" allowfullscreen></iframe>
    #82
  3. Pablo83

    Pablo83 Sleep, Wrench, Ride

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    That's a tough one. If you want OEM gauges then check eBay and you probably want to check eBay sites in some European countries as well since this is going to be hard to find.

    If you are going to buy an aftermarket speedo they come in different ratios. The GR is 2240:60 (2240 RPM= 60 MPH). I bought a cheap J&P branded speedo from J&P and it never worked well and completely broke in 6 months and they wouldn't replace it, so I don't recommend them. Lots of Harley's are 2240:60 so there are lots of speedos out there that will work.

    The last option I can think of is a Trailtech Vapor unit. It permanently mounts to the bike. You will need to glue a magnet to the front tire and clamp a pickup to the forks to run the unit. These are popular for plated dirt bikes.
    #83
  4. mark1150

    mark1150 Been here awhile

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    Wow,
    Well worth reading and the end result is super cool.
    A huge pat on the back for such an inspired build.
    #84
  5. Pablo83

    Pablo83 Sleep, Wrench, Ride

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    [​IMG]
    #85
  6. Pablo83

    Pablo83 Sleep, Wrench, Ride

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    one of the innovative aspects of the GR650 is the dual mass flywheel: at lower RPMs a secondary flywheel engages so the bike will idle and accelerate smoother. When pulling away at WOT, it almost feels like the bike downshifts at a certain RPM and I've been suspicious that this is caused they the disengaging flywheel. Something I've wanted to do for a while now is remove the second flywheel and see how it handles. I finally got around to it recently.

    [​IMG]

    It's a pretty simple system that was very easy to remove. Pulling away from a stop now requires a little more clutch slipping, but no more than any modern dirt bike. Power delivery is much smoother throughout the RPM range. I no longer have to keep the bike at peak RPM to keep the engine from feeling sluggish. I thought I would have to raise the idle to keep the bike idling smoothly, but that did not turn out to be the case. Needless to say, the second flywheel will not be going back on.
    #86
  7. BiGR Rich

    BiGR Rich Been here awhile

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    Good to know, Pablo!

    Haven't heard from ya in a while - how are the spoke wheels coming along?
    #87
  8. Pablo83

    Pablo83 Sleep, Wrench, Ride

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    The GR now has new shoes:

    Old:
    [​IMG]

    New:
    [​IMG]

    The biggest change with the tires is going from a 16" to a 19" rear. The GR has always felt wobbly in high speed corners. A couple people have suggested it had a flexible chassis. turns out it has a lot more to do with that balloon of a back tire. With the 19" rear, handling is much better.
    #88
  9. BiGR Rich

    BiGR Rich Been here awhile

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    Looks good, sir!
    #89
  10. Pablo83

    Pablo83 Sleep, Wrench, Ride

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    Thanks for the rims, Rich. I really like spoked wheels. If you know someone who prefers cast wheels on a their GR, I have an extra set.
    #90
  11. vtwin

    vtwin Air cooled runnin' mon

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    Pablo, that's exactly how my GR feels in a long fast sweeper, wobbly. Tried to pump up the tire pressure, new rear shock, pumped up the pressure in the front shocks and checked the swingarm bearings. Still has it and feels better if I ride it with one hand in those situations. Maybe it is the big tire?
    #91
  12. Pablo83

    Pablo83 Sleep, Wrench, Ride

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    I considered beefing up the rear swingarm a number of times. I'm glad I went with the tire change first. The stock tire is a 130/90-16 which means it has a profile height of 117mm. My new rear tire is a 120/80-18 with a 96mm profile. I'm not a fan of 16" rims: there's no dual sport selection available for them . I'm really happy with the improved handling of the new tire, but I'd prefer something slightly wider for better aesthetics. If I were going to stick with the stock rim I would try a 130/70-16.
    #92
  13. Duck_Pilot

    Duck_Pilot Retired Roadracer

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    If you want to try a wider rim, try Woody's Wheel Works in Denver. Those folks can lace-up about any combination ya want......... and they do excellent work.
    #93
  14. BiGR Rich

    BiGR Rich Been here awhile

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    VTwin, if you decide to try spoke wheels (and different tire sizes obviously), let me know. I still have one, maybe two rear hubs hanging around in my garage.
    #94
  15. vtwin

    vtwin Air cooled runnin' mon

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    Thanks Rich, I may consider that.:D
    #95
  16. Andyvh1959

    Andyvh1959 Cheesehead Klompen

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    Da frozen tundra eh? 1.5 mile west of Lambeau
    Looks MUCH more proper as a flat-tracker with the spoked alloy rims!!!
    #96