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Yamaha Minarelli vs. 1E50QMB

Last post 11-29-2009 02:40 PM by 15UZU. 9 replies.
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  • 11-22-2009 03:03 AM

    Yamaha Minarelli vs. 1E50QMB

    I am trying to source a bigger motor for a Yamaha YW50 to compete in a 5000 km rally in here in the US. The YW50 is pretty much the same bike as the BWS100 sold everywhere but the US and Canada. The 101 cc motor was never sold in the US, and I have to buy a 20' container of them if I want one from Taiwan, which seems like overkill to me. I can get the 1E50QMB (90cc Yamaha Minarelli clone) motor here though.  Does anyone have experience with the 1E50QMB and know how it compares to the Minarelli? I particularly want to know if the Yamaha oil pump, stator, drivetrain, and other parts that are crucial to my completing this event bolt on.  Also are there inherent design flaws to compensate for? Also, are the NCY aftermarket parts any good?

    In the YW50's current incarnation, it has an Athena 70cc kit, Leo Vince pipe, Athena final drive and belt, and Adige HRS rollers, in case anyone feels compelled to write about all the great things that can be done to a stock 50cc motor. It is fast, but to complete an event like this, the bike will need to sustain a fairly high average speed in varying altitudes while carrying almost 150 kg of rider and gear.  

  • 11-22-2009 09:26 AM In reply to

    • INMA
    • Top 50 Contributor
    • Joined on 03-19-2009
    • Posts 844

    Re: Yamaha Minarelli vs. 1E50QMB

    Your mods are probably as much as you will get while holding reasonable reliability on that engine package.

    The crankshaft is your limiting component and the yamaha crank is the most reliable of the stock crankshafts.  You would need to buy a race crank to get more reliable power and life out of a chinese clone.

    A water cooled cylinder would be an upgrade that might improve your ride.

    If you want to improve your reliability, a thermocouple on the exhaust to give you an indication of the exhaust remperature and a dyno tune would be the best way of being sure you are tuned properly.  The thermocouple will help you keep an eye on the engine during the trip.

    Use good quality semi synthetic oil and lots of it, 30:1 mix sounds about right assuming your flat out most of the time.

    Finally after preparing the scooter do a 100 mile test ride, if it lasts 100miles it will probably do 500miles.

    2001 Yamaha Zuma, DR Evo 68 cylinder, Leo Vince TT derestricted, Delorto 17.5 (#98 jet), standard aircleaner, RMS fan, Race CDI, Standard oiler and premix @ 75:1 Shell SX2, Doppler SR3 variator, RMS clutch, RMS R rear shock absorber and Pirelli SL26 tyres.
  • 11-24-2009 07:32 PM In reply to

    • 15UZU
    • Top 25 Contributor
    • Joined on 01-08-2009
    • Slacks Creek, QLD
    • Posts 1,140

    Re: Yamaha Minarelli vs. 1E50QMB

    Hmm....learn something new every day

    1E40QMB = 50cc

    1E50QMB = 90cc

    Are there anymore in the family??????



    2010 PGO X-Hot 150cc - clocking up the kays
    2006 Vmoto Monza 50cc - to be rebuilt......I wonder if I can get this TMAX 500 engine in here??? o_O
    2005 Vmoto Monza 50cc - in the rebuild phase
    2002 Aprilia SR50 50cc - currently out on loan
  • 11-25-2009 04:53 AM In reply to

    Re: Yamaha Minarelli vs. 1E50QMB

    1PE50QMB appears to be a 100cc version of the motor used in ATVs. Apparently the number designates the bore in ccm. Hence the 50cc 4T is a 139QMB, with a 39 ccm bore

  • 11-25-2009 07:34 AM In reply to

    • INMA
    • Top 50 Contributor
    • Joined on 03-19-2009
    • Posts 844

    Re: Yamaha Minarelli vs. 1E50QMB

    http://cgi.ebay.com/ebaymotors/Racing-Cylinderkit-Yamaha-Vino-Zuma-1E40QMB-50cc-100cc_W0QQcmdZViewItemQQhashZitem35a4e4b6c8QQitemZ230399719112QQptZMotorcyclesQ5fPartsQ5fAccessories

    2001 Yamaha Zuma, DR Evo 68 cylinder, Leo Vince TT derestricted, Delorto 17.5 (#98 jet), standard aircleaner, RMS fan, Race CDI, Standard oiler and premix @ 75:1 Shell SX2, Doppler SR3 variator, RMS clutch, RMS R rear shock absorber and Pirelli SL26 tyres.
  • 11-25-2009 02:30 PM In reply to

    • 15UZU
    • Top 25 Contributor
    • Joined on 01-08-2009
    • Slacks Creek, QLD
    • Posts 1,140

    -



    2010 PGO X-Hot 150cc - clocking up the kays
    2006 Vmoto Monza 50cc - to be rebuilt......I wonder if I can get this TMAX 500 engine in here??? o_O
    2005 Vmoto Monza 50cc - in the rebuild phase
    2002 Aprilia SR50 50cc - currently out on loan
  • 11-29-2009 12:17 PM In reply to

    • 15UZU
    • Top 25 Contributor
    • Joined on 01-08-2009
    • Slacks Creek, QLD
    • Posts 1,140

    -



    2010 PGO X-Hot 150cc - clocking up the kays
    2006 Vmoto Monza 50cc - to be rebuilt......I wonder if I can get this TMAX 500 engine in here??? o_O
    2005 Vmoto Monza 50cc - in the rebuild phase
    2002 Aprilia SR50 50cc - currently out on loan
  • 11-29-2009 12:46 PM In reply to

    • waxhead
    • Top 50 Contributor
    • Joined on 12-17-2007
    • gold coast
    • Posts 882

    Re: Yamaha Minarelli vs. 1E50QMB

    Gee thats a lot bigger 

    How does it effect the transfer port volume , This is the major weak area on the 100cc mineralli engines

    Can you post a pic from the bottom of the cylinders please

  • 11-29-2009 01:07 PM In reply to

    • 15UZU
    • Top 25 Contributor
    • Joined on 01-08-2009
    • Slacks Creek, QLD
    • Posts 1,140

    -



    2010 PGO X-Hot 150cc - clocking up the kays
    2006 Vmoto Monza 50cc - to be rebuilt......I wonder if I can get this TMAX 500 engine in here??? o_O
    2005 Vmoto Monza 50cc - in the rebuild phase
    2002 Aprilia SR50 50cc - currently out on loan
  • 11-29-2009 02:40 PM In reply to

    • 15UZU
    • Top 25 Contributor
    • Joined on 01-08-2009
    • Slacks Creek, QLD
    • Posts 1,140

    -



    2010 PGO X-Hot 150cc - clocking up the kays
    2006 Vmoto Monza 50cc - to be rebuilt......I wonder if I can get this TMAX 500 engine in here??? o_O
    2005 Vmoto Monza 50cc - in the rebuild phase
    2002 Aprilia SR50 50cc - currently out on loan
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