MJSfoto1956

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About MJSfoto1956

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MJSfoto1956's Activity

  1. MJSfoto1956 added a post in a topic Can a brother get 24 hours of happiness?   

    I had a similar experience recently -- I validated a spark but it still wouldn't fire up when I attempted to start. Went through everything (even rebuilding the carb) and still wouldn't start. Then I noticed that the grounding cable (near the starter) was loose. Tightened her up and away she went. YMMV
    M
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  2. MJSfoto1956 added a post in a topic Post your top speed record   

    Lat year I picked up a chromed header from AliExpress that looks just like the middle one in the above photo. And it cost just $12 shipped to the USA. This year I ended up mating it to a 17" reverse cone tunable exhaust from these guys: https://www.ebay.com/itm/152736197399. A touch noisier than I would prefer but it isn't super obnoxious either.
    Michael
     
     
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  3. MJSfoto1956 added a post in a topic Post your top speed record   

    A couple of years ago I had both cataracts done within 6 months of each other and for the first time since 3rd grade I didn't need glasses anymore. I can't imagine what folks did 100 years ago. I guess they slowly went blind. Lucky we live in this era. Just need to find a way to reduce the sticker shock across the nation.
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  4. MJSfoto1956 added a post in a topic Why does my KOSO inductive tach need ground?   

    Fair enough (and it makes sense). But then KOSO failed to mention anything about grounding the unit in their instructions. I might add, they show the mounting screws as optional offering a pure velcro mounting option as the alternative. As such, there is no designated grounding point. SMH!
    M
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  5. MJSfoto1956 added a topic in Discuss Anything related to scooters   

    Why does my KOSO inductive tach need ground?
    So I bought a KOSO mini tach and fabricated a mount for it to sit in front of my speedometer. Ran the inductive wire to the spark plug wire and wrapped it 5 times and secured it with a plastic tie. Go to start the engine and nothing. By happenstance, I touched the metal mount and voila -- the tach works. Don't get me wrong, it is no big deal for me to ground the holder, but this kind of tach is supposed to work without any other connections (in fact, it even comes with a velcro mount!). So while it works like a charm, I'm scratching my head as to why it needs to be grounded. Any ideas? (see pix)
    M


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  6. MJSfoto1956 added a post in a topic Low RPM @ takeoff, runs fine at speed   

    I guess it is what it is in my case. I don't have radar. I don't (yet) have a tachometer even. So I chose something that had significance to me: uphills. As long as I can do 50+mph uphill with my scooter I'm a happy camper. Top speed is unimportant to me. Given my requirements, it works. Thanks for the insight though!
    M
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  7. MJSfoto1956 added a post in a topic Close calls on 2 wheels   

    or as we call them up here in Massachusetts: rotaries
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  8. MJSfoto1956 added a post in a topic Low RPM @ takeoff, runs fine at speed   

    Yes. As mentioned before, I have a long run uphill from a standing stop that I use as a proxy for overall performance. With a set distance the most I could achieve before installing the DR3 was 45mph. With no other changes other than the DR3 I was getting 50mph under the same conditions. So I"m happy enough. Keep in mind I have not "tuned" the variator yet -- I"m using 12g weights with no insight as to what the RPMs are. Next up is to install a tach and then adjust the weights to optimize the behavior.
    M
    Sadly I didn't think to photograph the schmuz I found on the variator. So no photos to post. But I will likely be taking it apart again after I install a tach, so perhaps I can redeem myself...
    M
     
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  9. MJSfoto1956 added a post in a topic Jiajue Zuma Clone (a.k.a "JayZee")   

    Before and after.
    2017 vs. 2018.
     

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  10. MJSfoto1956 added a post in a topic Low RPM @ takeoff, runs fine at speed   

    Just validated that the problem was in the variator. Not sure if the design/manufacture of the DR3 is the issue or mixing the 10g + 14g was the issue. But for now the 12g mix seems just fine.
    Next up I need to install a tachometer so I can establish the ideal weights to use.
    M
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  11. MJSfoto1956 added a post in a topic Low RPM @ takeoff, runs fine at speed   

    I just replaced the combination of 10g + 14g sliders with 12g sliders + 12g rollers.
    There was some flaking of the teflon to be found amongst the sliders as well as some minor galling of the pin/boss as PistonGuy suggested. At least the ramps are now nice and smooth. I did notice that the part that slides moves up and down smoothly *IF** it is straight. But if tilted at a slight angle, the plastic slides bind to the aluminum posts. I'm wondering if I shouldn't polish the edges to prevent that?
    I'll take it out tomorrow morning and report back. 
    M
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  12. MJSfoto1956 added a post in a topic Low RPM @ takeoff, runs fine at speed   

    guess that means I shouldn't ride it until I find out the root cause eh?
    Damn fine riding weather these days.
    Was hoping the wrenching was behind me for a while...
    M
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  13. MJSfoto1956 added a topic in 125/150cc   

    Low RPM @ takeoff, runs fine at speed
    So have a new behavior that is not all that bad, but I am trying to understand it. 
    When I start off from a standstill, the RPMs no longer rev high, instead, the transmission engages pretty much right away (i.e. @ low RPMs). The takeoff is smooth and eventually it runs like a champ at speed with clear change in variator as I apply the throttle on straights as well as uphill. This behavior is new and came on this past week. It is not altogether a bad thing btw. I'm just trying to understand what might be going differently on "under the hood". 
    N.B. I recently installed both a Gates belt and a DR3 variator with a combination of 10g + 14g (I also installed a 3.5" FrogSkin vent in my CVT case). Initially for the first 50+ miles this combination ran "as expected". Only recently does it exhibit this new behavior.
    Thoughts?
    Michael
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  14. MJSfoto1956 added a post in a topic Next chapter   

    Canadian Marines are badass. Just sayin'
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  15. MJSfoto1956 added a post in a topic Engine Design and modification   

    In the ancient world, there were no rudders. Instead, there was a "steer board" on the right and as such, they always pulled the boat up to the dock (port side) on the left.
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