skyhawk in frame tank racer build

Discussion in 'Photos & Bicycle Builds' started by mikemarley, May 14, 2015.

  1. mikemarley

    mikemarley Member

    does anyone know of a larger reed block than the rock solid one, besides the arrow racing one?
     

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  2. mikemarley

    mikemarley Member

    tried to buy the arrow rracing red block. he sent my $ money back in a few hrs. we dont like each other at all, because he is horrible at customer service, and i get angry when someones race balanced crank explodes my motor in 2 weeks even running 20:1 castor oil
     
  3. KCvale

    KCvale Motorized Bicycle Vendor

    I am of the thought that that just a longer (off-set) intake pipe does almost as much as a reed in slowing the intake backflow, without an expansion chamber exhaust anyway.
     
  4. mikemarley

    mikemarley Member

    it would, but my piston has a window in, so i need it more for metering air and fuel, the bike wont even start without it lol
    but in other news found a guy to make me a reed valve!!
     

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    Last edited: Jul 15, 2015
  5. mikemarley

    mikemarley Member

    got a spare motor on my bike while im building the monster, and it looks so funny lol.
    so tiny and out of place looking
     

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  6. Leroybrown420

    Leroybrown420 Member


    It matches the rear wheel.
     
  7. mikemarley

    mikemarley Member

    lmao yea i guess so. i have the skyhawk frame so i can only fit the 26 in tire in there, the fronts a 29er tubeless . space is tight lol.
    i need a nice fat back tire though...
     
  8. KCvale

    KCvale Motorized Bicycle Vendor

    A piston window?
    What the heck is that??

    There is only so much you can do these before you render them useless like you have now bud.
     
  9. mikemarley

    mikemarley Member

    lol, its a hole in the piston that lets the trapped gas in the crankcase, under the piston out increasing top rpm. alot of racing 2 strokes do it look it up. but like i said now i need the reed valve to keep the pressure in the motor so it will run.

    my motor was build by a professional machinist, his bike goes 73. he machinez his own motors, and parts and hes even made a crankcase intake reed motor, all his bikes run with them so im good thanks though lol
     

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    Last edited: Jul 15, 2015
  10. MotorBicycleRacing

    MotorBicycleRacing Well-Known Member

    Jim Irvin?
    His bike don't go 73......:jester:
     
  11. mikemarley

    mikemarley Member

    nope not jim, i do talk to him ocassionally though, i dont like to say names. hes been around forever, and makes crazy parts and mods for the china girl
     
  12. KCvale

    KCvale Motorized Bicycle Vendor

    (just scratches head)

    You know there is a much easier way to gain performance that lasts more than a race or two...
    They are called gears.
    It won't kill your engine but will blow you away ;-}
     
  13. Leroybrown420

    Leroybrown420 Member


    Most MB racing is for single speed bikes. Shifters are not allowed. Personally, I've never liked the idea of using a small chain under extreme load and forcing it off track with a derailleur. Isn't that why we all use 415 chains now days. I've snapped my share of 410 motorized chains and stock bicycle chains on unmotorized bikes. Has to be the weak link, right?

    With that being said, kicking around the idea of electrifying my dyno ultra glide. If that happens I want gears. PART_1436751362647_0712151833.jpg
     
  14. mikemarley

    mikemarley Member

    lol, yeah i could run a jackshaft setup again, but like leroy said, you break chains due to the small bicycle chain, and i went through a few derailers when the chain locked up too. i was fast with a jack shaft butim waaaayfaster withthe 34tooth gear.
    one last thing it does have to be a single gear to race or id of kept it and tried
     
  15. KCvale

    KCvale Motorized Bicycle Vendor

    Hummm, things have changed since the last Death Race in Tucson I was in with gears.
    What races have you been in?
    That was my first and only one, I can't take another spill of any sort so no more racing for me.

    Me either, that is why I like internal shifters, heck a 3-speed is enough, and HS 410 holds up just fine for me.


    Man, I don't know, that bike begs to have that fake tank made a real gas tank with a gas engine.
    If you want go that way swing by the shop next week with it, I have played with this kind of thing before ;-}
     
  16. MotorBicycleRacing

    MotorBicycleRacing Well-Known Member

    Socal Motor Bicycle Racing has always allowed shifting in the rear hub.

    Sick Bike Parts is one of our great sponsors since our first race in 2011.

    We don't allow multi speed shiftable motorcycle engines.

    There at least 3 race bikes currently using the bicycle side chain to shift gears.

    Where is all this MB racing going on?
     
  17. mikemarley

    mikemarley Member

    so an 8 speed motorized mountain bike could enter? i got told i couldnt enter
    i tried to enter this beauty, she eats parts though so it really was too bad of s loss lol
     

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  18. MotorBicycleRacing

    MotorBicycleRacing Well-Known Member

    Yes, your 8 speed motorized mountain bike can race at Socal Motor Bicycle Racing events.

    There are several derailleur shifting race bikes at our races.

    Who told you you couldn't enter?
    When did this happen?
     
  19. mikemarley

    mikemarley Member

    it was from the offical rules a few years back, i thought the multispeed engine was reffering to derailers, so i built a single speed racer for it insread
     
  20. Leroybrown420

    Leroybrown420 Member

    Awesome! Still has to be allot of chains grenading with the "side chain to shift gears".
     
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