How much HP on the stock crank?
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Thread: How much HP on the stock crank?

  1. #1
    Stock, ready to MOD runout1961's Avatar
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    How much HP on the stock crank?

    How much HP can the stock crank handle? Let's say you have a 2017 raptor 700. Big 3 is full monster exhaust, fci intake, pc5. Next upgrades would be a +1 valve and port job, +3 throttle body, hot cams stage 3 cam and a CP 11:1 piston as a fun, safe, reliable pump gas build. Would the stock crank hold up to the power upgrades without having to be upgraded/rebuilt with stronger parts?


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  2. #2
    Stock, ready to MOD Oregonduner's Avatar
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    I'm pushing 70hp on stock and no issues. I have 734 bb, +2 valve, 5050 cam, monster duals, fci,+3 Tb,msd and 11.5:1. Running pump gas

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    Easily over 90hp. I have seen many turbo builds over 90 on the stock crank.

    Coop we miss you brother..

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  5. #4
    Stock, ready to MOD runout1961's Avatar
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    Reason I brought it up is because I've seen and heard a lot of horror stories about the new 2015 and up cranks going bad


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  6. #5
    Stock, ready to MOD TW_700r's Avatar
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    I would suggest going with a crankworks or falicon if you are planning on making more than 75-80. I know a lot of people are using oem cranks making well over 80 but that’s a large risk in my opinion. If you have the money I would do it at about 75+hp just for ease of mind. On a new bike you are pry still pretty safe at 75hp but anything over 80 I would start to be a little concerned. On an older bike with a lot of hours on it I would do it at 75hp asap. A lot of times it’s the rod bearings that go first. And not the rod that actually fails. If your rod fails it will most likely take the cases,piston, and probably the head with it and that is and expensive repair. Running an oem bottom end with over 80hp is kind of like rolling the dice in my opinion. especially if it’s a bike with a lot of hours.

  7. #6
    Modding the Motor 09RappySE's Avatar
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    734 09 Raptor
    Meglodon by Bo,Ferrea valves/KW springs, Web 4 Cam, 54mm TB, 105.5mm CP cylinder, 14:1 CP,Barkers Inframe,Dynatek Coil,PC V,Dynatek Programable ignition,CCP stabilizer,+5 swinger,Boss Noss Sys, Direct Drive Lock-up, KDS Evac valve,HID Light conversion,SPAL fan
    Tuned by EHS Racing 78hp 55Tq

  8. #7
    Modding the Motor 09RappySE's Avatar
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    And stock bottom end....................still.
    734 09 Raptor
    Meglodon by Bo,Ferrea valves/KW springs, Web 4 Cam, 54mm TB, 105.5mm CP cylinder, 14:1 CP,Barkers Inframe,Dynatek Coil,PC V,Dynatek Programable ignition,CCP stabilizer,+5 swinger,Boss Noss Sys, Direct Drive Lock-up, KDS Evac valve,HID Light conversion,SPAL fan
    Tuned by EHS Racing 78hp 55Tq

  9. #8
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    Bottom end is solid. Unless you go crazy with the motor I would not mess with it.

    Coop we miss you brother..

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