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Thread: RS 50 Derestriction confusion

  1. #1
    apriliaforum newb RSolly's Avatar
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    RS 50 Derestriction confusion

    Hi new to the forum, just bought a New RS 50 and as of yet it is still restricted. I have been quoted by a mechanic 490 for the derestriction. This includes new arrow exhaust, new carburetor and new chain and sproket's. Does this sound about right? I was going to just derestrict the standard exhaust and rejet the carb but was told this was harmful to the engine, is this correct?

    Cheers,


    Olly
    Last edited by RSolly; 09-21-2010 at 02:05 PM.

  2. #2
    apriliaforum expert Ryan.s's Avatar
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    New as in, brand new?






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  3. #3
    apriliaforum newb RSolly's Avatar
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    Yep brand new. Videos on youtube if you wish to view it . Aprilia RS 50 Max biaggi race replica

  4. #4
    apriliaforum newb RSolly's Avatar
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    well done 350 miles so far ( had first service )

  5. #5
    apriliaforum expert Ryan.s's Avatar
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    Very nice looking bike, If your going to de-restrict it. Your best bet is to get it done by the dealer you got it from. That way it will keep its warranty. When i brought my bike new, the dealer de-restricted it for an extra 60 pound.






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    apriliaforum Member jcb121's Avatar
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    you look like a decent chap!

    maybe you should save your pennies and learn something new and do it yourself?

    the older rs50 is as simple as a kids puzzle and im sure the newer one is too.
    there is plenty of info on here about it.

    lets price this up quick.

    Giannelli Exhaust 168.59
    Polini 21mm Carb, with all the bits needed 131.16
    Pack o' Jets 10.17
    Front Sprocket 9.78

    so that is 319.70, so say more 330 with P+P
    with the money you save you could get a Italkit or Airsal top end.

    but do you really want to tempt fate with warranty?
    RS50 2002

    Nsr125 1990

    If you can't spell use Google Chrome! spell check that stuff :P

    70mph on the clocks probably a bit less then that irl

  7. #7
    apriliaforum newb RSolly's Avatar
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    ye that sounds more financially viable. Does the bike run alright? the shop that i bought it from ( the one that want's me to spend 500 on performance parts) said it wont run well if derestricted with original parts, Is this a load of bull?

  8. #8
    apriliaforum newb RSolly's Avatar
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    ye jcb121 which ever method i chose to derestrict the bike i intend to get it done by the dealer as i want to keep the warranty

  9. #9
    apriliaforum expert Ryan.s's Avatar
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    Well with mine, it runs perfect 55mph at around 11k revs. Obviously dont ride constant at high revs, but yeah. All they did on mine was upgrade the (i think) front sprocket. And thats it.






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  10. #10
    apriliaforum newb RSolly's Avatar
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    isn't there a restrictor in the exhaust and carb? I may be wrong. Mine restricted wont rev past 7-8k rpm.

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  12. #12
    apriliaforum newb RSolly's Avatar
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    I have had a look through the forum. I am aware of threads about the derestriction process of an RS 50 but my question was primarily about what the dealer had suggested as an option ( the 490 quote and the performance upgrades ) and others opinions on this matter. Apologies if this exact question has been asked before.

    Regards,

    Olly

  13. #13
    apriliaforum expert Aprilia af1's Avatar
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    Quote Originally Posted by RSolly View Post
    isn't there a restrictor in the exhaust and carb? I may be wrong. Mine restricted wont rev past 7-8k rpm.
    There will definately be a catalytic converter in the expansion chamber. Carb may have been restricted by use of a smaller jet.
    Cdi shouldn't be restricted.
    Aprilia af1 50 replica 1992
    rv6 engine, polini 47mm 70cc top end
    19mm carb, doppler er1 exhaust, derbi gpr50 cdi unit.
    malossi reed block standard reeds. 13/40 sprockets
    75mph at 11,500rpm clocked by a landrover freelander(probably more like 70mph).

    Other Bike: Aprilia af1 125 replica de-restricted from factory. SOLD


  14. #14
    Tecnologia Reparto Corse RS_Patrick's Avatar
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    Fit an Arrow or Giannelli pipe, Bigger (+-10%) Mainjet, 1 tooth bigger front sprocket, 1 grade high sparkplug (if its a 8 now you need a 9), and 0.30 reeds.

    If you than still feel like getting a bigger carb, i sugest you get a 19mm, not a 21mm.
    21mm is a bit much for the stock cilinder and (because of that also) hard to set up perfectly, you always have a little dip/lack of power somewhere accross the RPM range.

    Also a good idea to fit an after market CDI unit thats has an improved ignition timing curve.

  15. #15
    apriliaforum newb RSolly's Avatar
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    Thanks that really helped . Getting it done by reedspeed scooters. The mechanic used to tune racing 2 strokes so he should do a pretty good job.

    Olly

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