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Thread: 85mm stroke crank, need help

  1. #61
    apriliaforum expert
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    i think the needle is rich. perhaps a 64 or 66 is more like it.
    --- diploma for engine repair in 2012
    --- custom parts and machining --- porting and polishing
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    ---derbi bullet 2006 - piaggio AC - TPR 70CC - giannelli shotV4
    ---1992 lt250r suzuki quadracer - new and improved
    --- complete 2012 wethepeople volta bmx - full sanko seamless chromoly frame/fork/handlebars

  2. #62
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    i do mostly city driving and a malossi 70 + Leo Vince Touring + 15.15 SHA work great for getting from traffic light to traffic light
    2004 Aprilia Mojito Retro 50cc
    2003 Vespa ET2 50cc
    2001 Triumph TT600

  3. #63
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    This one does not work yet. New fuel. Changed for 65 main jet. Smokes a lot specially on uphill.

    I ordered a manual choke just to make sure that the problem is not the automatic choke. After that I will rise the needle clip to the highest point to see how it runs.
    Aprilia SR 50 R Factory 2009 Silver Crowd
    Aprilia SR 50 2008 Silver Crowd
    Aprilia RS 50 2003 SBK Replica

  4. #64
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    jixaw has 70cc and a new geniune stock 16mm sha carby. no tuning needed. kind of funny when you think about it
    --- diploma for engine repair in 2012
    --- custom parts and machining --- porting and polishing
    ------------------------------------------------------------------------
    ---derbi bullet 2006 - piaggio AC - TPR 70CC - giannelli shotV4
    ---1992 lt250r suzuki quadracer - new and improved
    --- complete 2012 wethepeople volta bmx - full sanko seamless chromoly frame/fork/handlebars

  5. #65
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    Well the choke was not the problem nor the needle position or the main jet. Tried 8 jets from 60-72. Pretty much the same on everyone. Needle adjustment was also waste of timd. Its now back together and is what is. Guess I just remembered this being a little faster but with this setup its just dead slow and uphill cababilities are shit compared to my factory sr and so is the overall respnsivness.
    Aprilia SR 50 R Factory 2009 Silver Crowd
    Aprilia SR 50 2008 Silver Crowd
    Aprilia RS 50 2003 SBK Replica

  6. #66
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    Quote Originally Posted by sublunacy View Post
    jixaw has 70cc and a new geniune stock 16mm sha carby. no tuning needed. kind of funny when you think about it

    msg me
    --- diploma for engine repair in 2012
    --- custom parts and machining --- porting and polishing
    ------------------------------------------------------------------------
    ---derbi bullet 2006 - piaggio AC - TPR 70CC - giannelli shotV4
    ---1992 lt250r suzuki quadracer - new and improved
    --- complete 2012 wethepeople volta bmx - full sanko seamless chromoly frame/fork/handlebars

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