Author 2018 engine in 2015 bike  (Read 1454 times)

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  • Offline bazzer   gb

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    Offline bazzer

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    2018 engine in 2015 bike
    on: November 15, 2020, 09:34:43 am
    November 15, 2020, 09:34:43 am
    Hi All

    Not sure if anyone will know but can anyone confirm if a 2018 engine will run on 2015 ecu and electronics etc. Are the sensors the same. The ecu was changed in 2017 but looking at the basic parts the engines seem the same.

    As part of giving mine a bit of love and attention and checking valve clearances I also did a leak down test. Num1 cylinder seems to have leaking inlet valves. There is a lot of carbon deposit on the back of the inlet valves. I am thinking there must be some on the valve seats too.

    I could whip head off and lap in valves,  they are not titanium on xr so that's possible. Or I could fit a later motor in it.


  • Offline orbits   gb

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    Re: 2018 engine in 2015 bike
    Reply #1 on: November 15, 2020, 06:08:29 pm
    November 15, 2020, 06:08:29 pm
    Other than some painstaking sniffing through sensors on realOEM I’m not quite sure how you’d answer that unless someone else has done a straight swap with success. It’s quite likely sensor mfrs will have changed over that period so then it’s about whether software will have had to change to accommodate that (or other general tweaks).

    I’d be more inclined to go with a few tanks of engine cleaner such as LiquiMoly to give it a general clean out, then lap the valves. Saves the faff with changing engine numbers on the V5c and the questions in the future from a prospective buyer about why the new engine. Also quite satisfying to do a decent head refurb. Just my view.

  • Offline smithy   au

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    Offline smithy

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    Re: 2018 engine in 2015 bike
    Reply #2 on: November 16, 2020, 03:04:30 am
    November 16, 2020, 03:04:30 am
    *Originally Posted by orbits [+]
    Also quite satisfying to do a decent head refurb. Just my view.

    So...are you telling him to give himself a head job..??  :155: :033:

    Sorry....I'll get my coat. :034:

    Smithy.
    When I die, I want to go peacefully in my sleep like my Grandfather....not screaming like the passengers in his car..!

  • Offline bazzer   gb

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    Offline bazzer

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    Re: 2018 engine in 2015 bike
    Reply #3 on: November 16, 2020, 07:17:31 am
    November 16, 2020, 07:17:31 am
    Part numbers all seemed the same on RealOEM and also replacement engine for a 2015 bike is now the later engine and the earlier part number is superseded.

    So I have a 2018 engine with 1700 miles on its way to me.

    Cyl1 and Cyl2 2 were leaking a lot of air out the inlets, 3 and 4 were air tight. There is quite a bit of carbon on the back of the valves. The air box is clean so I can only assume this is from valve stem seals or poor fuel (I always try to use either Shell or BP super). The good news is the clearances were within spec :-)

    This is a 2015 bike that I have had had from new thats done 28K miles, It was running fine before I checked it out. It must have been down on power though a bit. I wonder how many are running around like this. I don't think dealers do a leak down test when they check the clearances.


  • Offline Winger   gb

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    Offline Winger

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    Re: 2018 engine in 2015 bike
    Reply #4 on: November 16, 2020, 07:25:17 am
    November 16, 2020, 07:25:17 am
    *Originally Posted by orbits [+]
    Other than some painstaking sniffing through sensors on realOEM I’m not quite sure how you’d answer that unless someone else has done a straight swap with success. It’s quite likely sensor mfrs will have changed over that period so then it’s about whether software will have had to change to accommodate that (or other general tweaks).

    Yep i’d Go with all of that but still the route i’d Prefer.

  • Offline bazzer   gb

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    Offline bazzer

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    Re: 2018 engine in 2015 bike
    Reply #5 on: November 16, 2020, 07:32:01 am
    November 16, 2020, 07:32:01 am
    Time you buy head bolts and gasket etc, I would be half way to the cost of the low mileage engine. My engine still would have 28K miles on the bottom end and gearbox.

    Its all a bit of a project :-) I do love a good tinker, in theory the later engine should have all the tweaks and improvements too.

    It will be getting mapped for the akra headers too, though it would seem the head and cams are exactly the same part number to the earlier bike.

    Cheers

    Bazzer



  • Offline Winger   gb

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    Offline Winger

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    Re: 2018 engine in 2015 bike
    Reply #6 on: November 16, 2020, 07:45:00 am
    November 16, 2020, 07:45:00 am
    Lost track of the number of motor changes I’ve seen and always the easiest way to go, it’s only when you are into the collectors stuff that engine rebuild become a serious option.

  • Offline bazzer   gb

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    Offline bazzer

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    Re: 2018 engine in 2015 bike
    Reply #7 on: November 16, 2020, 07:55:06 am
    November 16, 2020, 07:55:06 am
    To be honest fixing the leaking valve on mine would not be hard. But once you have it out and on the bench you can then disappear off down the rabbit hole and check everything, I bet then I would find something else.

    A fresh (ish) engine will do me another 5yrs :-) I probably will buy something newer then :-)




     



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