GSXR Big Bore kit

Discussion in 'Tech' started by iomTT, Jun 6, 2014.

  1. iomTT

    iomTT Well-Known Member

    what cc can the latest model GSXR 750 be bored out too please
     
  2. RM Racing

    RM Racing Tool user

    Not often done with that engine - good luck. You will likely be looking at custom pistons, possibly 3mm over - 815cc?
     
  3. SPL170db

    SPL170db Trackday winner


    They don't explicitly mention the latest gen 750 but I don't think that the motor is monumentally changed from the 11-14 from the 06-10 model motors, but as mentioned 815cc's is what they are doing.

    http://www.kwsmotorsports.com/s750.htm
     
  4. iomTT

    iomTT Well-Known Member

    cheers Team.
     
  5. mpp12

    mpp12 Well-Known Member

    Ask Ed from EDR, he likes to build those big.
     
  6. Handicapped Racer

    Handicapped Racer Well-Known Member

    3 mm 815cc, proprietary overbore from KWS.
    Ported epoxy head and cam. 162-165 hp
     
  7. iomTT

    iomTT Well-Known Member




    Thankyou man, i sent you a PM also and have emailed Kevin at KWS
     
    Last edited: Jun 10, 2014
  8. mpp12

    mpp12 Well-Known Member

    To me the perfect bike after riding a 2013 gsxr 750 would be a ABS 850cc sportbike, for the street, no need no more.....

    Im currently riding a very fast gsxr 1000 and sometimes I find it 2 much.
     
  9. iomTT

    iomTT Well-Known Member




    You got my thinking for a cool very rideable road bike
     
  10. ed who?

    ed who? the opposite of eharmony.

    I have done over 2 dozen + 750 big bores. Most time we do 2mm 792cc as the 3mm 815cc dont last long (split cylinders)

    a properly built 792cc on GOOD gas will make min 160 and i have hit 170.2 on one but all conditions were perfect and it was $60/gal fuel. Typically most mine run U4.4 and make 162-165. They vary depending on year too. The 06-07 will make most top end but the 11-14 really work well too. 06-07 are the strongest cases to use. Most my guys (90% of them) use at trackdays and very little issues. But again some after 2 full years will develop cracks in cases below output shaft or worse, between cylinders (mainly the 08-10 cases)

    Very cool build and piss off 1000cc guys a LOT on track, but dont build one cheap!! Spend the money and do it right.
     
  11. iomTT

    iomTT Well-Known Member


    ed, could you PM me a build price please based on 06-07 792cc motor supplied to your door. Top end is more important to me for this unit mate.:beer:
     
  12. iomTT

    iomTT Well-Known Member


    You have a question re a price to build me one man in your PM box:D
     
  13. shakazulu12

    shakazulu12 Well-Known Member

    Call his shop or email him there, he rarely logs in here.
     
  14. iomTT

    iomTT Well-Known Member

    Cheers man, any hints for email for him? I have no idea what his shop is called or located
     
  15. Boman Forklift

    Boman Forklift Well-Known Member

  16. iomTT

    iomTT Well-Known Member

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