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Author Topic: porting: spare heads wanted  (Read 4480 times)

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Offline Terry in Australia

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Re: porting: spare heads wanted
« Reply #25 on: January 03, 2008, 03:54:45 PM »
Can I use an electric 1/4" die grinder Big Jay? My air grinder is a noisy sucker...............  ;D
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I was feeling sorry for myself because I couldn't afford new bike boots, until I met a man with no legs.

So I said, "Hey mate, you haven't got any bike boots you don't need, do you?"

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Offline Big Jay

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Re: porting: spare heads wanted
« Reply #26 on: January 03, 2008, 05:11:39 PM »
Quote from: Terry in Australia on January 03, 2008, 03:54:45 PM
Can I use an electric 1/4" die grinder Big Jay? My air grinder is a noisy sucker...............  ;D

I thought that was what I Pods were for ;D

You can use the elect as long as it has decent rpm.

Jay
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Offline Terry in Australia

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Re: porting: spare heads wanted
« Reply #27 on: January 03, 2008, 05:24:57 PM »
Do the abrasive "drums" clog up with aluminum? I grind aluminum bases for my Suzuki oil cooler adapters with a belt linisher and 7 inch disc mounted on a pedestal grinder, and I have to use a "dry lube" stick to stop the abrasive from clogging up with aluminum particles, is that a problem with the grinding drums on an air grinder too? ;D
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I was feeling sorry for myself because I couldn't afford new bike boots, until I met a man with no legs.

So I said, "Hey mate, you haven't got any bike boots you don't need, do you?"

"Crazy is a very misunderstood term, it's a fine line that some of us can lean over and still keep our balance" (thanks RB550Four)

Offline MRieck

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Re: porting: spare heads wanted
« Reply #28 on: January 03, 2008, 05:37:59 PM »
Quote from: Terry in Australia on January 03, 2008, 05:24:57 PM
Do the abrasive "drums" clog up with aluminum? I grind aluminum bases for my Suzuki oil cooler adapters with a belt linisher and 7 inch disc mounted on a pedestal grinder, and I have to use a "dry lube" stick to stop the abrasive from clogging up with aluminum particles, is that a problem with the grinding drums on an air grinder too? ;D
If you spin the burr to fast it will heat the suface of the aluminum and surface harden it. It will create ripples which can be a PITA to remove. I use a Foredom electric unit with variable speed foot control. It's quiet, has a lot of torque and offers great control.
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Offline Terry in Australia

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Re: porting: spare heads wanted
« Reply #29 on: January 03, 2008, 06:08:47 PM »
Is this the one Mike? Looks good! ;D

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I was feeling sorry for myself because I couldn't afford new bike boots, until I met a man with no legs.

So I said, "Hey mate, you haven't got any bike boots you don't need, do you?"

"Crazy is a very misunderstood term, it's a fine line that some of us can lean over and still keep our balance" (thanks RB550Four)

Offline MRieck

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Re: porting: spare heads wanted
« Reply #30 on: January 03, 2008, 06:15:20 PM »
Quote from: Terry in Australia on January 03, 2008, 06:08:47 PM
Is this the one Mike? Looks good! ;D


Bingo Terry.
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Offline paulages

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Re: porting: spare heads wanted
« Reply #31 on: January 03, 2008, 06:45:38 PM »
Quote from: Hockers Choppers on January 03, 2008, 03:53:29 PM
If You are going to use the head after porting, please save the trouble and liver and have a pro port Your head!!!!! You will most likely loose HP! This IS brain surgery and rocket science put together!!

true, but both rocket science (my dad actually is a rocket scientist  ::)) and brain surgery can be learned. luckily there is an abundance of good information on the subject, and both mike rieck and my machinist (he's been porting since before the 750 was even dreamed of, and has done lots of cb750 heads since the '70's) have been quite helpful with the tips. i have a 650 head at the shop that mike did, which ought to make a good reference.

i bought an assortment of 6" shank, double cut carbide burrs from a local tool supply.

mike: what type of wax do you recommend? when dan was showing me his porting area and giving me some tips, he had both a candle and some sort of wax in a tube that he uses in the burr while grinding.
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paul
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Offline MRieck

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Re: porting: spare heads wanted
« Reply #32 on: January 03, 2008, 07:18:12 PM »
 The porting wax in a tube though to be honest I don't use it a lot with aluminum. I run the bit slower and take smaller cuts which doesn't clog the burr. I do use a little bit with the heavy fluted burrs to remove material quick. The 6" shanks are long Paul and the longer the bit the less controll. I've found 4" to 4.5" works on just about every bike port I've encountered. Car stuff is different....you need long bits. The good thing about the 6" shank is you can cut them down to whatever length you want.
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Offline Terry in Australia

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Re: porting: spare heads wanted
« Reply #33 on: January 03, 2008, 07:25:56 PM »
Hey Mike, hows about a pic of the range of burrs you use, so I don't go buying the wrong ones? Cheers, Terry. ;D
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I was feeling sorry for myself because I couldn't afford new bike boots, until I met a man with no legs.

So I said, "Hey mate, you haven't got any bike boots you don't need, do you?"

"Crazy is a very misunderstood term, it's a fine line that some of us can lean over and still keep our balance" (thanks RB550Four)

Offline MRieck

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Re: porting: spare heads wanted
« Reply #34 on: January 03, 2008, 07:27:50 PM »
Quote from: Terry in Australia on January 03, 2008, 07:25:56 PM
Hey Mike, hows about a pic of the range of burrs you use, so I don't go buying the wrong ones? Cheers, Terry. ;D
It will have to be tomorrow mate. Bedtime now. ;)
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Offline paulages

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Re: porting: spare heads wanted
« Reply #35 on: January 03, 2008, 10:59:49 PM »
Quote from: MRieck on January 03, 2008, 07:18:12 PM
The porting wax in a tube though to be honest I don't use it a lot with aluminum. I run the bit slower and take smaller cuts which doesn't clog the burr. I do use a little bit with the heavy fluted burrs to remove material quick. The 6" shanks are long Paul and the longer the bit the less controll. I've found 4" to 4.5" works on just about every bike port I've encountered. Car stuff is different....you need long bits. The good thing about the 6" shank is you can cut them down to whatever length you want.

yeah, i thought the 6" burrs might be a little long, but they didn't have anything in between 2.5" and 6". i'll try 'em and keep looking for more once i know what they feel like. they were half the price of the place in tennessee you told me about at least.
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paul
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1976 CB550 (590cc) road racer
1973 CB750K3
1972 NORTON Commando Combat
1996 KLX650 R

Offline Jim F

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Re: porting: spare heads wanted
« Reply #36 on: January 04, 2008, 05:13:15 AM »
If you talking 2 stroke then just mill some transfer ports and make some cut outs for
read blocks and make a killer K750TZ
ring ding ding ding ding..............:)

I might have some heads you can mess with after Mike
checks them out to see if there anygood

Jim
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