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Performance of a Bored and Sleeved RDs.

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  • #1

    Performance of a Bored and Sleeved RDs.

    As the bore has run enough and when it needs to get a more neat inner surface matching the piston , it is bored to 0.25mm oversize. and it goes on in 0.25 mm steps upto 1.5mm is what i have heard.
    Then comes the crucial part, though all boring are crucial, the Sleeving job.
    This is something which needs precision and expertise care to get a good sleeve.
    But my doubt is...
    1.How different is the performace of the bike on a STD Block and a STD sleeved block?
    2. And how does the performance vary as and when the STD block is bored and STD SLEEVED block is bored?
    ( I know that the heat dissipation on the STD block is better than that in a SLEEVED BORE).
    Can anyone pour more light on this?
    Thank you.
    Last edited by ujwaldignified; 06-27-2009, 02:21 AM.
    Tags: None
  • #2
    Topic Approved.
    :)

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    • #3
      Performance of a steel sleeved engine will always be below standars bores due to the amount of heat generated. Also if the sleeve job is not done properly it causes massive wear and tear in the engine. I have heard that titanium sleeves work better.
      HYPERTHRUST CLEARED AND COUNTING
      5.....4.....3....2.....1
      sigpic

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      • #4
        this is interesting
        but i believe uhaveto sleeve after .75mm thats
        so for 1mm piston u haveto have it sleeved

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        • #5
          Originally posted by kar1zma View Post
          this is interesting
          but i believe uhaveto sleeve after .75mm thats
          so for 1mm piston u haveto have it sleeved
          Boring oversizes depends on the thickness of the cylinder. In RDs, the boring can go upto 1.5mm.

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          • #6
            this is new for me i thought only upto 1 mm

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            • #7
              Experts please pen down something.

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              • #8
                lol..titanium sleeves and all eh nice knowledge bank you got there

                sleeves are made in cast iron, and yes resleeving your RD cylinders is a good option provided its done well. the reason sleeving is such a bad word in india is because the person doing it has no clue how to cut the ports right, and match them well. this is also due to lack of proper porting tools. a properly done sleeve setup works as good or even better than an unsleeved setup, IF done well. I'd say go for it

                I've seen 1.5mm pistons go in an RD. If you can find the pistons, please do go ahead with that too.
                83' RD350 HT
                96' RXG
                97' RXZ
                91'RX100>09'RX165
                2010' HH ZMR

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                • #9
                  Originally posted by atul_astro View Post
                  lol..titanium sleeves and all eh nice knowledge bank you got there

                  sleeves are made in cast iron, and yes resleeving your RD cylinders is a good option provided its done well. the reason sleeving is such a bad word in india is because the person doing it has no clue how to cut the ports right, and match them well. this is also due to lack of proper porting tools. a properly done sleeve setup works as good or even better than an unsleeved setup, IF done well. I'd say go for it

                  I've seen 1.5mm pistons go in an RD. If you can find the pistons, please do go ahead with that too.
                  Thanks a lot.
                  So being in bangalore.. I have decided to get it done with Ron Chinoy.
                  I have a HT Bore as well ready for sleeving.

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