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Merijn

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Posts posted by Merijn

  1. On 10/4/2021 at 3:47 PM, Rake said:

    The engine was cold on the compression test. Throttle was closed.

    Test with wide open throttle. The actual readings are not very accurate on most testers anyway, as long as it gives a decent value and all 4 are on the same level it says enough to begin with. Since 1 is way lower, lift off the cam cover and check valve clearance and if there's anything different from the other 3 going on. It's not a lot of work on a 750K

  2. On 3/1/2021 at 1:21 AM, Ivan said:

    For me the header no succes, hanging way to low under much pressure and with single gasket against front framerail. I have no big heater so not able to bend it any further. Have to be another exhaust.

    That's to bad, did neither fit on a powerscreen with front framerails.. 

     

    On 2/27/2021 at 8:44 PM, clivegto said:

    Never seen any dyno figures of before and afterwards with them so who knows. 

    I can use a dyno of a friend now and then, might give it a go comparing...

  3. On 3/28/2020 at 3:52 PM, ronin said:

    Hi,  in regards your problem I have an 85 slabby fitted with an 1100m engine and I run 40mms with an original airbox. I did need to grind down the inside of the frame slight, not a significant amount and certainly not enough to cause problems after that I had to cut two slots in the top of the airbox turned what I cut out upside down and plastic welded them back into place. It's still a very tight fit but is doable. Am going back to the garage later so if I can get a half decent pic will post up for you.

     

    Managed to fit the airbox. Heated up the bottom and dented in on the section where it will hit the frame. Does fit ok now. But thanks anyway!

    IMG_20200329_194526.jpg

  4. 16 minutes ago, Dezza said:

    You could try using the carb rubbers from a 750 j/k. These will bring your carbs 5mm closer to the cylinder head to give a little more space.

    Thought they didn't line up, but will have another look tomorrow.

  5. Using a powerscreen engine for my 7/11. Did put the BST36 on it. Trying to fit the 750 airbox, but it won't. 

    Bottom of the airbox is already touching the brace where the rearshock bracket is mounted on. 

    Is there a combination or trick possible to use an airbox for a 7/11?

    IMG_20200312_195317.jpg

  6. 44 minutes ago, Gixer1460 said:

    Odd as a 15/52 is lower geared than a 15/48 and with a lower rolling circumference goes less distance per rev  - maybe it runs a taller profile to equal a 60 profile on GSXR ? Yes weight would be an issue on accel. but as a general / touring use, top speed wouldn't be so crucial?

    The GSXF has an 150/80, so yeah that'll be about the same as the GSXR then.

  7. 5 hours ago, Gixer1460 said:

    I was surprised to see that an 1100F used 52T rear as the GSXR1100 uses a 48T std. and mine used to pull a 45T quite easily. So no you don't want to go bigger unless you want zero front tyre wear! I thought they were both 17" rims?

    Gsxf has a 16" rim.  The F is a lot heavier than a 7/11 tho, wouldn't that be a factor as well?

  8. 2 hours ago, dupersunc said:

    Use the stock 15/48 that the gsxr1100 uses. 14/48 if you want to save front tyre wear.

    Thanks! :D

     

    2 hours ago, Blubber said:

    Hi, 

    Welcome to OSS, 

     

    Introduction in general please :)

     

    PS.  We like pictures and have rules ;)

    Will do!

    Still collecting parts and gathering info, will post pictures when I start building :)

    • Like 1
  9. Hello all,  my first post here.

    I have a '89 powerscreen engine stored and decided to do something with it, so I bought a '89 slingshot 750 frame to build a 7/11 from there on.

    But now I can't really find any information on the sprocket ratio. Is it common to use the standard sprocket size of the engine, or is there a recommended one?

    Hope someone can help me with this, thank you in advance!

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