Aprilla SR50 anyone have one? Like it, hate it?

Discussion in 'Battle Scooters' started by novaboy, Jul 2, 2013.

  1. Chillis

    Chillis Land Barge Pilot

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    Not saying you are a liar but 225 bikes out of 300 being sold through one dealer blew up?

    A high quantity of bikes fouling plugs?

    These bikes are not like a carbed bike. To get excess fuel out of this type of FI system is only possible by having low compression. That or the wrong spark plug. Or a stock bike running a Malossi piggyback TC unit.
    #61
  2. Chillis

    Chillis Land Barge Pilot

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    You know what the problem with the dealer you worked for with fouled plugs and blown motors could have been? Mixing oil with gas and not filling the oil tank.

    Fouled plugs. Blowing up engines from no oil to the bottom end. Sounds like your description of these bikes to the 't' Cortez.
    #62
  3. Cortez

    Cortez BAZINGA!

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    This was happening all over europe, not just in one dealership.

    The injector used in those engines was removed from market very soon
    after that, and most EU countrys never imported any FI scooters ever again.

    I gain or loose nothing by making this up, people lost their jobs, reputations
    etc because of this, I was just there when it happened, and figured it was
    common knowledge to everyone because of the internet, but then I
    figured out that it didn't happen when gas quality was ok.

    There's still people locally riding on some of these that didn't blow up,
    and you'll find a spare spark plug in every single one.
    #63
  4. B02S4

    B02S4 Aye

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    Brian, does your SR have direct injection (EFI, not oil) or a throttle body?
    #64
  5. Chillis

    Chillis Land Barge Pilot

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    It is direct injection. Has an onboard compressor driven off of the crank that forces air to the combo fuel and air injectors straight into the combustion chamber just before ignition.
    #65
  6. B02S4

    B02S4 Aye

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    Very cool. Is it mechanical fuel injection then, instead of ECU-controlled?
    #66
  7. Chillis

    Chillis Land Barge Pilot

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    ECU controlled.

    Not the simplest scoot out there. It relies on the ECU and the dash computer to function. Should someone steal the bike they would need to replace the dashboard as it communicates with the transistorized key.

    A new dash is over $600.

    These are not your ordinary scooter by any means.

    Cortez, I am not trying to discredit your information. You are saying these bikes are riddled with issues but anything can be under certain circumstances. If you don't inherit a bike with problems they are very reliable and perform admirably.
    #67
  8. johnyrrr

    johnyrrr Been here awhile

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    mwlehman, thanks for posting this info, I wonder if it would be this easy to do on mu 2007 if i ever needed to? Ive had a airpump line get a tiny hole that had me wanting to tear off the complicated injection system once. Good info just got back from Ft Meyers beach and am not enjoying our weather back home. Would love to take scotters with us next time and do some exploring, esp., the coastal road to Bonita:evil




    #68
  9. greg531

    greg531 greg531

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    Johnny....
    AF-1 racing has a good forum on SR-50's....
    A couple of guys in my club have tricked out SR-50's.....
    If you ever get to Grand Rapids, we meet on Thursday's for rides, when this weather gets to be spring again......
    #69
  10. Motovista

    Motovista Parts is Parts

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    Excellent write-up. The SR 50 and Malaguti F-15 are two of my favorite performance small scooters that are/were sold in the US, and it's great to see Piaggio committed to bringing the SR 50 in. It's good to know that you can junk the ditech and convert the Aprilia to a carb and put all the fun stuff on it.
    #70
  11. mwlehman

    mwlehman Adventurer

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    my 2003 has 7900 miles on it and my wife has 1900 on her 01 ditech
    #71
  12. johnyrrr

    johnyrrr Been here awhile

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    Ive been to the AF1 website for info, pretty informative. I wonder how long it would take me to get to GR for some SR50 action, you sure dont see many around here, Id love to se some hopped up ones. Mines supposedly Derestricted and has a Leo pipe and I changed the rolers and it does about 47mph pulling 200lbs.:freaky

    #72
  13. johnyrrr

    johnyrrr Been here awhile

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    Thanks for posting the info on carbing the ditech, I wonder if you tried a cheap Arreche 19mm carb if you get a little more out of yours, 17mm is small for a piped version I think. Upping the carb is the first thing to do when building the zuma over 50cc when I had one, just a thought??

    #73
  14. ride4321

    ride4321 Long timer

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    I'm looking at these and wondering if the FI 2 stroke is the way to go or not. The dealer I'm looking at has a 4 stroke and 2 stroke with a very enticing markdown right now. The 4 stroke (Motard) is about $400 less. Guess I need to get over to AF1 and do some more research. I'd like to hear more from you 2 stroke guys. The one I'm looking at is a 2013 new leftover.
    #74
  15. Chillis

    Chillis Land Barge Pilot

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    Go to AF1. Too many non-owner heresay around these parts.

    I had one. Ditech. If you plan to do any mods or want superior performance go for the 2 stroke. If the Ditech is not for you you can convert to carb later and build up to a 100mph bike.

    Check HGT website for modifications.

    I did transmission and exhaust and reeds on mine and it would get me around 60mph top speed. It used little oil(Ditech) and got mid 90's mpg most of the time.

    Handling was tops, especially after I added the Malossi shock. The SR50 was an absolute blast.

    Keep in mind that you will 9 times out of 10 have your fuel pump fail. The bike will run poorly and or die completely. Again, check HGT fuel pump mod. I fixed mine by myself and never had an issue after that.

    I still miss the bike but I no longer have the short commute to make it worth having. Sold it earlier this year.
    #75
  16. ride4321

    ride4321 Long timer

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    Thanks for the info Brian. I remember looking at this scoot a few years ago and reading this thread. The conflict was disturbing to say the least. I am only slightly mechanically inclined and depend on tutorials to get it done correctly on most mods. It appears the AF1 site has the info but I'm still thinking the carbed bike might be better for me. I'll report back as I read more. I'm sure others have the same concerns and this thread needs to stay active...:evil
    #76
  17. Chillis

    Chillis Land Barge Pilot

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    As long as you run the specific oil the Ditech requires and do the fuel pump fix they are faultless unless beaten to hell. I would imagine JerryH loading it down with 300+ lbs and trying to climb mountains may cause a problem.

    Although the SR was the only small cc scoot that would accelerate up a hill. I will never forget once mine was broke in I took it to some hills and while at 30mph at part throttle, I rolled on and it quickly took to 40mph.

    My air cooled 2 stroke Genuine would be flat out on level ground at 45mph so the Aprilia was a revelation.
    #77