Performance of a Bored and Sleeved RDs. - xBhp.com : The Global Indian Biking Community

ujwaldignified · 06-26-2009, 08:45 PM

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.

Aryan · 06-26-2009, 10:12 PM

Topic Approved.

Bibhu · 06-27-2009, 09:14 AM

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.

kar1zma · 06-27-2009, 10:17 AM

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

ujwaldignified · 06-27-2009, 10:32 AM

Quote:

Originally Posted by kar1zma

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.

kar1zma · 06-27-2009, 12:32 PM

this is new for me i thought only upto 1 mm

ujwaldignified · 06-27-2009, 03:04 PM

Experts please pen down something.

atul_astro · 06-27-2009, 03:43 PM

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.

ujwaldignified · 06-27-2009, 04:37 PM

Quote:

Originally Posted by atul_astro

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.

06-26-2009, 08:45 PM	#1 (permalink)
ujwaldignified Junior Member Join Date: Jun 2009 Posts: 12	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 at 01:21 AM.

06-26-2009, 10:12 PM	#2 (permalink)
Aryan Senior Member Join Date: Jan 2006 Location: New Delhi/ Shillong Posts: 18,274	Topic Approved. __________________ ...in search of that perfect world - My Travel Blog :)

06-27-2009, 03:43 PM	#8 (permalink)
atul_astro League Apart Join Date: Oct 2008 Location: Andheri [E] Mumbai Posts: 384	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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06-27-2009, 09:14 AM	#3 (permalink)
Bibhu Biker reborn Join Date: May 2009 Location: Cuttack Posts: 438	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.

06-27-2009, 10:17 AM	#4 (permalink)
kar1zma Senior Member Join Date: Jul 2004 Location: hyderabad, Eastern Province(KSA) Posts: 425	this is interesting but i believe uhaveto sleeve after .75mm thats so for 1mm piston u haveto have it sleeved

06-27-2009, 12:32 PM	#6 (permalink)
kar1zma Senior Member Join Date: Jul 2004 Location: hyderabad, Eastern Province(KSA) Posts: 425	this is new for me i thought only upto 1 mm

06-27-2009, 03:04 PM	#7 (permalink)
ujwaldignified Junior Member Join Date: Jun 2009 Posts: 12	Experts please pen down something.

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