2mm over bore - Pointy? - SV650.org

19-09-11, 08:39 PM

any one done a 2mm over bore on a 04 onwards

just after any info on reliability issues

squirrel_hunter · 19-09-11, 10:12 PM

Only know of 'Busa Pistons or Big Bore conversions. What does 2mm give you?

yorkie_chris · 20-09-11, 02:19 PM

677 maybe? You do maths

squirrel_hunter · 20-09-11, 03:49 PM

I don't have enough fingers or toes to get to that sort of numbering...

yorkie_chris · 20-09-11, 04:47 PM

Yeah it is 677.
Just do Pi*(radius of bore)^2 * stroke

No I haven't done one. What other modifications along with it?

andrewsmith · 20-09-11, 05:18 PM

Would it not be easier to put shorter throw rods and busa pistons?

20-09-11, 05:27 PM

You will need pistons for that surely

yorkie_chris · 20-09-11, 07:23 PM

Quote:

Originally Posted by andrewsmith

Would it not be easier to put shorter throw rods and busa pistons?

What would shorter rods accomplish other than reducing compression?

andrewsmith · 20-09-11, 07:33 PM

Quote:

Originally Posted by yorkie_chris

What would shorter rods accomplish other than reducing compression?

Doesn't it mean the top RPM is elevated

20-09-11, 07:35 PM

Rev limit will stop top RPM going any higher than before

19-09-11, 08:39 PM	#1
prilpot Guest Posts: n/a	2mm over bore - Pointy? any one done a 2mm over bore on a 04 onwards just after any info on reliability issues

19-09-11, 10:12 PM	#2
squirrel_hunter Member Mega Poster Join Date: Apr 2005 Location: Sunny Swindon Posts: 3,579	Re: 2mm over bore - Pointy? Only know of 'Busa Pistons or Big Bore conversions. What does 2mm give you? __________________ "A little enthusiastic?" May I add here, GG is awesome and I think I am in love with Stretchie...he rocks my world! SH2 \| 2MA \| GROM \| YSR

20-09-11, 02:19 PM	#3
yorkie_chris Noisy Git Mega Poster Join Date: Apr 2007 Location: Halifax/Leeds Posts: 26,645	Re: 2mm over bore - Pointy? 677 maybe? You do maths __________________ Currently Ex Biker Now rebuilding a 63' fishing trawler as a dive boat

20-09-11, 03:49 PM	#4
squirrel_hunter Member Mega Poster Join Date: Apr 2005 Location: Sunny Swindon Posts: 3,579	Re: 2mm over bore - Pointy? I don't have enough fingers or toes to get to that sort of numbering... __________________ "A little enthusiastic?" May I add here, GG is awesome and I think I am in love with Stretchie...he rocks my world! SH2 \| 2MA \| GROM \| YSR

20-09-11, 04:47 PM	#5
yorkie_chris Noisy Git Mega Poster Join Date: Apr 2007 Location: Halifax/Leeds Posts: 26,645	Re: 2mm over bore - Pointy? Yeah it is 677. Just do Pi(radius of bore)^2 stroke No I haven't done one. What other modifications along with it? __________________ Currently Ex Biker Now rebuilding a 63' fishing trawler as a dive boat

20-09-11, 05:18 PM	#6
andrewsmith Member Mega Poster Join Date: Apr 2010 Location: Newcastle upon Tyne, Just south of salad dodging country Posts: 7,750	Re: 2mm over bore - Pointy? Would it not be easier to put shorter throw rods and busa pistons? __________________ RIP Reeder 20/07/1988 - 21/03/2012. Always missed squire!!! Every year we meet old friends, gain some new ones, lose old ones and you always remember them all. “Live as if you were to die tomorrow. Learn as if you were to live forever.” Mahatma Gandhi

20-09-11, 05:27 PM	#7
hardhat_harry Guest Posts: n/a	Re: 2mm over bore - Pointy? You will need pistons for that surely

20-09-11, 07:35 PM	#10
hardhat_harry Guest Posts: n/a	Re: 2mm over bore - Pointy? Rev limit will stop top RPM going any higher than before