Just a little battle of the 4-strokes, or OHC vs. OHV vs. flatty

Discussion in '4 Stroke Bicycle Engines & Kits' started by jmason92, Apr 10, 2016.

?

Which of the three 4-strokes would you go for if looking for a 4-stroke conversion?

  1. Honda GX35 OHC

    1 vote(s)
    5.9%
  2. Honda GHX50 OHV

    5 vote(s)
    29.4%
  3. Briggs 5hp Model 13 flatty

    11 vote(s)
    64.7%
  1. jmason92

    jmason92 New Member

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    So, just for fun, I'm posting a little battle of the 4-strokes poll, the three valve arrangements duking it out are OHC, OHV, and flatty/sidevalve.
     
  2. 916Tim

    916Tim New Member

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    I've got the little HS 38cc OHC on a friction drive im in the process of building. We'll see how she does..
     
  3. WECSOG

    WECSOG New Member

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    Flat is where it's at! Especially for a rat bike build.
     
  4. mat_man

    mat_man New Member

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  5. scratchbuilder

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    5horse Briggs...if you drove each one...the Briggs would ' Trump' em.
     
  6. culvercityclassic

    culvercityclassic Active Member

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    I have built them all, just love the look and history of a Briggs Flathead.
     

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  7. Gbrebes

    Gbrebes Member

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    Hello All,


    I feel that I must weigh in, given I have used all three engine designs on my motorized bicycle.

    First, I used a 5hp Briggs. I loved the vintage feel and the ability to build more hp, but I found that for stop and go traffic, which I find myself in, the Briggs would tend to smoke and also overheat.

    Second, I used a Honda GC190. This engine is an OHC design. I loved this engine with its upright mounting orientation, but this motor did not love me. I busted about 4 to 5 of these engines, snapped valves, slipped timing belt, stripped timing belt pulley on crankshaft, and finally a thrown connecting rod. It was good while it lasted.

    Third, I have recently installed a predator 212cc harbor freight engine, OHV design. This engine is THE ONE as far as I am concerned. I have not logged a whole bunch of miles yet, but what I have experience so far is more usable (low end) power, more robust and less prone to failure, and overall more reliable power plant.

    I love them flatheads, but my heart says I have to vote for OHV with the Predator 212cc engine.

    For what its worth,

    Gilbert
     

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