cyclinder head porting - SV650.org

17-11-06, 06:15 PM

got the sv stripped down at the mo. its a 99 model sv. so i thought i could get some engine work done. as far as i know the engine hasnt really had any treatment. is it worth gertting the heads ported? any recomendations to people who i should use?? also any other things i should consider doing to the engine while ive got it out. im getting new hoses, air kit, dyno jet kit ect. any thing else??

cheers

18-11-06, 04:59 PM

It's worth opening up the Inlet tract on the head to match the carb inlet rubbers,polish the Inlet
tract (not to a mirror finish) so you still get a bit of turbulence before it gets to the valves.
Polish the Combustion chambers to remove any hotspots which can cause detonation.
Do the same to the exhaust side as you did to the Inlet tract.
Polish the Exhaust tract to a mirror finish this time,so there is nothing to hinder the gas coming
out on the exhaust stroke.

18-11-06, 07:29 PM

The porting on the SV is very close to optimum right out of the box. If you are going to spend that amount of money on the engine, get an 800cc big bore kit instead.

17-11-06, 06:15 PM	#1
riktherider Guest Posts: n/a	cyclinder head porting got the sv stripped down at the mo. its a 99 model sv. so i thought i could get some engine work done. as far as i know the engine hasnt really had any treatment. is it worth gertting the heads ported? any recomendations to people who i should use?? also any other things i should consider doing to the engine while ive got it out. im getting new hoses, air kit, dyno jet kit ect. any thing else?? cheers

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18-11-06, 04:59 PM	#2
mick24 Guest Posts: n/a	It's worth opening up the Inlet tract on the head to match the carb inlet rubbers,polish the Inlet tract (not to a mirror finish) so you still get a bit of turbulence before it gets to the valves. Polish the Combustion chambers to remove any hotspots which can cause detonation. Do the same to the exhaust side as you did to the Inlet tract. Polish the Exhaust tract to a mirror finish this time,so there is nothing to hinder the gas coming out on the exhaust stroke.

18-11-06, 07:29 PM	#3
sdusk Guest Posts: n/a	The porting on the SV is very close to optimum right out of the box. If you are going to spend that amount of money on the engine, get an 800cc big bore kit instead.