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FZR 2KR WONT REV OVER 10000 WHEN IN GEAR

Discussion in 'Yamaha 250cc In-Line 4's' started by Aerojake, Mar 24, 2015.

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  1. Aerojake

    Aerojake Member

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    Thanks mclaren,
    Yeah ill keep searching for some new boots. But i reckon the heatshrink tape will be ok i highly Doubt that the tape would get sucked in its pretty strong stuff especially once its heated and shrunken it holds like a fat kid with a ice cream.
     
    Aerojake, Apr 5, 2015
    #41
  2. Bluey

    Bluey Well-Known Member

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    If you find some nice cheapish boots definitely post them!
    Might need some for my 2kr soon
     
    Bluey, Apr 5, 2015
    #42
  3. Mclaren

    Mclaren Well-Known Member Contributing Member

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    Tape ok just not a silicone type
     
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    Mclaren, Apr 5, 2015
    #43
  4. Aerojake

    Aerojake Member

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    When I was removing the main jets I noticed that carb 1and2 were clean but 3 and 4 were covered in wet black stuff its the same colour as used engine oil?
     
    Aerojake, Apr 5, 2015
    #44
  5. Aerojake

    Aerojake Member

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    Anyone know of other suitable fuel filters besides the yamaha 1FK-24560
     
    Aerojake, Apr 6, 2015
    #45
  6. Linkin

    Linkin The Mechanic Premium Member Contributing Member Dirty Wheel Club

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    Hate to say it... oil in the cylinders may be a bad head gasket.
     
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    Linkin, Apr 6, 2015
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  7. Aerojake

    Aerojake Member

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    20150405_203401.jpg

    Same colour as you can see on the main jet but once its removed its a little darker and looks slightly wet on the tube that the jet slides over.
    Hope its not the head gasket cant see any leaking oil anywhere might see if I can chase up a compression tester just to make sure. If i was to take the head off i'd be replacing the rings and I dont really want to see a set of pistons after 27 years at 18000rpm and god knows how many owners.
     
    Aerojake, Apr 6, 2015
    #47
  8. Linkin

    Linkin The Mechanic Premium Member Contributing Member Dirty Wheel Club

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    Ah sorry I thought you meant in the cylinders or the spark plugs, not the carbs.
     
    Linkin, Apr 6, 2015
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  9. Murdo

    Murdo The Good Doctor Staff Member Contributing Member Ride and Events Crew

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    You have a bit of phobia about head gaskets Linkin. :lolsign:
     
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    Murdo, Apr 6, 2015
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  10. Aerojake

    Aerojake Member

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    All good yeah I was wondering how oil would get in there lol
    Number 3 cylinder spark plug was a little black slightly wet it looks exactly like my ktm 300 but thats a 2 stroke and running slightly rich.

    I was wondering while I have the carbs off may as well check chain tensioner you guys have a link on this or is it pretty straight foward.
     
    Last edited by a moderator: Apr 6, 2015
    Aerojake, Apr 6, 2015
    #50
  11. Th3_Huntsman

    Th3_Huntsman Senior Member Contributing Member

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    i would say from the airbox as the blowback goes into there
     
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    Th3_Huntsman, Apr 6, 2015
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  12. GreyImport

    GreyImport Administrator Staff Member The Chief Contributing Member

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    GreyImport, Apr 6, 2015
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  13. Aerojake

    Aerojake Member

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    Now you mention it yeah the airbox is quite oily.
    Thanks for the link GreyImport im pretty sure the one in mine isent auto tensioning though.
     
    Aerojake, Apr 6, 2015
    #53
  14. Joker

    Joker See "about me" for contact details. Contributing Member

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    Dude, if you battery is flat in 7 minutes it's not charging. Three possibilities:

    1. Battery is stuffed and not holding charge (you can test this easily enough). How old is it, have you tried replacing it? Not a bad investment either way.
    2. Reg/rec (AC to DC conversion) you said you've checked that so that one's ruled out
    3. Stator. Most likely you've got buggered stator coils (it's shorting on one of the phases). Try and source another one.

    I don't think there's any other ways you could see the symptoms you're having, you've done well to recognise the issues at the battery. I'd be resolving this first before messing with your carbies or you're changing more than one thing at once and you may mask/miss the complete resolution.

    Good luck.
     
    Joker, Apr 6, 2015
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  15. thebeefsalad

    thebeefsalad Well-Known Member

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    Invest in a JIS screwdriver. Phillips screws/drivers are designed to cam-out at max torque. JIS is designed to NOT cam out.
     
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    thebeefsalad, Apr 7, 2015
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  16. Aerojake

    Aerojake Member

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    All good Stu charging problem is sorted now, the replacement VRR i brought was no good so it must of been something dodgy with the old wiring as I pretty much rewired the whole bike lol

    Yeah ill definitely look into the jis type screwdrivers.
     
    Aerojake, Apr 7, 2015
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  17. GreyImport

    GreyImport Administrator Staff Member The Chief Contributing Member

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    GreyImport, Apr 7, 2015
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  18. Aerojake

    Aerojake Member

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    So it is a auto tensioning one I could pull the plunger out another 7mm so I think its ok.
     
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    Aerojake, Apr 7, 2015
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  19. Aerojake

    Aerojake Member

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    Ok so I snapped 1 of the screw that screw into the emulsion tube :( hoping that I can drill a hollow out of a brass screw and use that.
    Btw does anyone know what the float height should be on a 2kr it has stock bds26 carbs, floats on no 3 and 4 were much lower than 1 and 2.
    The way I see there is 3 methods of measuring float height 1 is with the carbs sitting flat and measuring to top of floats no2 is measuring with carbs flat with the floats fully open and no3 is with the carbs tilted 45degrees with the tang slightly touching the valve which is the way I've always done it can anyone clarify this please.
     
    Aerojake, Apr 7, 2015
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  20. Aerojake

    Aerojake Member

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    Aerojake, Apr 7, 2015
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