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  1. Just fill the grooves with Sika flex and go .

    Just fill the grooves with Sika flex and go .
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    An 800 grate will get you past 71mph , your...

    An 800 grate will get you past 71mph , your choice but an 800 grate is still very good in the ocean .
  3. The cross over passages are under the Carb mounts...

    The cross over passages are under the Carb mounts , they allow the interchange of vacuum between intake manifolds . When they are blocked off it increases the vacuum in each carb throat ( signal...
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    Machined head 36cc domes , 1.2mm squish , Advent...

    Machined head 36cc domes , 1.2mm squish , Advent 84 curve , carbs 120 mains 110 lows 95 gram springs 1.5 needle and seat , fuel pump equalisation mod done , filled Inlet manifold cross overs , Riva...
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    View Post

    It’s probably a fuel blockage , I just went thru the same issue on a XLT1200 . Or a faulty spark plug lead , replace all three to be sure .
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    Lesson in chasing a problem

    I have 2 GP1200R’s and an XLT1200 that I bought with a damaged engine. They all have the same engines and carbs , I am very experienced with this format yet I chased an imaginary “electrical “...
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    They are still in business as far as I know , I...

    They are still in business as far as I know , I mistakenly thought they had closed down .
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    Yam 84 is best in my opinion, use good fuel and...

    Yam 84 is best in my opinion, use good fuel and you will be very happy.
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    It’s running a bit lean still ! The pistons...

    It’s running a bit lean still ! The pistons should be shiny around the outer edges ( No carbon) . This is because the piston crown is getting hot enough to burn the oil and carbonise the outer edges...
  10. Thread: GPR Advent CDI

    by Adam
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    The sticker on the side say what version you have...

    The sticker on the side say what version you have . Advent have the curves for the different versions on their website.
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    What sticker is on the side of it ? You can tell...

    What sticker is on the side of it ? You can tell what curves it was programmed with on the Advent web site . I have just purchased another 1290 CDI too for my second GP1200R , I too will check which...
  12. Your starter maybe worn out !

    Your starter maybe worn out !
  13. Has anyone else noticed how hard it is to buy GPR...

    Has anyone else noticed how hard it is to buy GPR scoop grates and ride plates since the Covid 19 pandemic ?
  14. All the 1200’s are the same . Only the GPR’s...

    All the 1200’s are the same . Only the GPR’s changed with the 1300 engine.
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    I replaced the rectifier too and cleaned up the...

    I replaced the rectifier too and cleaned up the earth cable and ran an extra earth cable from the battery to the metal Case that holds the CDI and Ignition coils . I did this so the battery cable to...
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    Fogging does not coat the internal needle and...

    Fogging does not coat the internal needle and seat and jets with oil ! Premix does .
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    Yep ��, that’s a mess ! I haven’t seen that...

    Yep ��, that’s a mess ! I haven’t seen that before but I have seen the piston sideways in the cylinder and Conrod bent 90’ .
  18. Thread: Gpr resurrection

    by Adam
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    415

    If you have a GP1200 /1300 up 2004 you will have...

    If you have a GP1200 /1300 up 2004 you will have the 60mm hub 155mm dia pumps . Those pumps dont have the higher thrust levels available from the 75mm hub high pressure pumps . The Skat trak set back...
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    There are plenty of hulls around with no engines...

    There are plenty of hulls around with no engines , but you could fix it at a pinch .
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    Who made R&D ride plates & Scoop grates ?

    Did R&D have their own metal casting equipment or did they get an outside contractor to make them ? I believe there’s still demand for these parts that isn’t being met .
  21. Thread: Gpr resurrection

    by Adam
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    415

    Yes it’s a modified stocker , it’s good in rough...

    Yes it’s a modified stocker , it’s good in rough water .
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    You need to check your carb throttle joining rod...

    You need to check your carb throttle joining rod , sometimes they break or pop off so only 2 cylinders are getting throttle openings .
  23. Thread: Gpr resurrection

    by Adam
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    415

    Gpr resurrection

    Saved this 07 GPR hull from destruction, now with a 1200 PV engine with 38cc head , 07 exhaust system, 1200 water box , R&D 1200 grate , R&D trim tabs , 14 vane Skat trak 158mm setback pump ,85mm...
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    I love my GP1200r/ 1300r skis I have 3 of them and an XLT 1200 . I am seeing a lot of skis being blown up from negligence and parted out , how many did Yamaha make world wide ? I see wreckers in...
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    The GP1300R has the 75mm hub too ,what size...

    The GP1300R has the 75mm hub too ,what size bearings does it use ? You will need a 1300 impeller with a 75mm hub if you use the 20mm driveshaft with the 8 vane stator.
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