View Full Version : Selling my 04 1200 heads.
24th December 2004, 15:34
Well I got my 883 heads. Now I need fundage to have them done. I will sell my 1200 heads to someone here if they are interested.
They have been shrunk ported (intake and exhaust)by JET Performance JET (http://cycledoctor.com/JohnsonArticles/JET.html), radius valve job and the springs set up.
A new set of 1200 heads cost about 650 and these are already done. I paid 800 for them and that is what I would like to get for them, plus shipping of about 20 bucks or so.
25th December 2004, 18:47
Can you ship to the UK??
25th December 2004, 19:26
Sure. Don't know how much but I will ship them there.
26th December 2004, 01:31
Why would you go to the 883 from the '04 1200 heads???
26th December 2004, 01:50
Smaller valves and ports. Want to increase velocity, more bottom end power and max at about 6K.
26th December 2004, 01:57
OK, I've just heard that the 1200 '04 XB type heads were the best thing going now!! :confused:
26th December 2004, 02:05
On a Buell or a 7500rpm motor they are great. Even good for a 84-88cu in motor. But I want a lot of torque from my bike. I've seen a 04 1200 with wisecos and 883 heads make like 85ft lbs at 3700K or so with only a stage 1 and a Twin Tech ignition and factory cams. Just something myself and my motor guy are gonna try out. I just can't afford another 1000 bucks right now after Christmas. So if I can sell mine I can have it done by April riding time.
26th December 2004, 02:13
What kind of horses is it putting out?? What kind of work are you going to have done to the 883 heads?
26th December 2004, 02:17
Same work as shown in the link above but with the 1200 intake valve. Right now I have 83HP at 6300 and 81ft lbs at 4000-4500rpms. Looking to get maybe 85-90ftlbs and hopefully keep about the same HP.
26th December 2004, 02:42
Read through all of JET's article, Interesting Stuff!!! Might have to give him a Call!! :D
Seems like your going through a bit for a little return???
26th December 2004, 02:50
Maybe, but I like wrenching. If I can sell my heads it will help offset the cost. I also need to get some Wiseco's and have them cut down. The 04 883 heads only have a 49.5 cc chamber. Wiseco's dish is only 11cc's, not enough for a 49cc chamber. Ah, it's all fun and games.
26th December 2004, 02:59
OK, I wish I had the time to wrench!!! Work to Damn much and what little time I do have I like to Ride!!!!
But I'm looking at doing the 1200 Conversion real soon and I'm not sure what direction I want to go!! Mild or semi-Wild, would like to get about 80hp and same TQ, but not break the bank!! :D
28th December 2004, 17:45
Are they still for sale? If so, do you have a price in mind?
28th December 2004, 19:48
Yes they are,sort of. A guy on the forum in England is interested in them. He is checking on the import fees and/or tariffs now. I'll let you know how it turns out.
I want 800 plus shipping for them.
28th December 2004, 20:30
Ok, he's first. Let me know how it goes.
1st January 2005, 14:18
Ok, heads are sold and paid for. Thanks Whiffy. I'll be trying to get em off today, clean em up a bit and ship em early this week.
Kudos go to whiffy. He said he wanted them and came through quickly.
I'll keep you guys informed as to how the 883 heads work out on my bike.
2nd January 2005, 04:10
Ok Whiffy, got the heads off and it looks like one of the valve seals is leaking a bit. I will take this to the shop and try to get it replaced as soon as possible. I do not want to send you something you will have to fix. Please be patient a bit as I want you to get a set of awsome heads in bolt on condtion. Not with aleaky seal. I will take care of this my friend. Barry
2nd January 2005, 18:37
Thanks Barry, you are too kind! I kinda expected to have to check the heads over, maybe re-grind the valves etc...I can hardy wait to get the spanners out.
2nd January 2005, 18:41
Whiffy, these heads have about 700 miles on em since they were done. My bike only has 1100 miles total. You are gonna get them clean and ready to put on. No re-grind or anything will be neccesary. Did you get the pics?
2nd January 2005, 19:35
Yes thanks Barry. Pics received. Are these how they came off the bike, or as they were from JET before you fitted them?
2nd January 2005, 20:09
Hey Barry, You may want to cc your 883 heads before you install them. I just did my 04 heads for the conversion and came up with 54 cc's in stock form. Just a thought....
2nd January 2005, 20:16
Did you put in two new valves or are those factory?
I do intend to cc them. I am only going to change my intake valve to the 1200 size. After the seats are bored and the valve job is done the valve will sit lower in the seat and change the cc's. I was just looking for ball park figures.
I pulled off my heads and found I have no deck height, 0 nada, none. So that changes my comp ratio formula a little.
It looks like the 8.5cc dish Wisecos will yeild about 10.5 to 1 with a .030 gasket. If I bump up to a factory .050 gasket comp drops tp about an even 10 to 1. Give or take a bit.
2nd January 2005, 20:55
They are stock valves. The deck height was also zero on mine. The Ross pistons I used are sold as 9.7:1 but that changes with gaskets etc.
I don't really want to be much above 10:1, but that should be cold. It will drop a bit when warmed up. There is a nice calculator on the Ross web site to figure compression. What's nice about it is, you can change gasket thickness and see what it does to compression. These are the numbers I came up with;
Compression Ratio 10.02:1 (cold)
Gasket Thickness (James Gaskets) .070 total (base+head)
Here is the link;
Ross Racing Pistons (http://www.rosspistons.com/calculator.php)
2nd January 2005, 21:08
Thanks for the link. That males it easy. I did all mine with paper and a calculator. The figures I came up with were very close to those. Once the heads are done and I get the cc size it will probably just come down to gasket size. The heads and pistons are basically a fixed size so gasket thickness is my only option unless I want to machine the pistons.
As far as base gasket goes, it doesn't really figure into the equation. With the base gasket in place and if you are at 0 deck height there is nothing to add into the formula.
0 deck height plus cylinder volume cc's(including valve pocket/dish cc's) plus head cc plus head gasket cc's divided by head cc's, gasket cc's and valve pocket/dish cc's.
Check your formula again and drop the base gasket. It is below the volume area and therefore does not count.
2nd January 2005, 21:43
I'm not sure about that. It seems to me that if you increase the size of the base gasket, you would be moving the cylinder and the head up in relation to the top of the piston at TDC stroke. The result would be an increase total chamber size, negative deck height and lower compression. Conversely, if I drop the base gasket, the cylinder and the head would move down more over the top of the piston at TDC with a decrease in total volume, increase in deck height, and increased compression. Whata' think..?
Imagine if a condom had a one inch thick ring at the base… Now that would lower compression!!! :yikes
2nd January 2005, 21:48
Yes but think of this.
If your deck height is at zero with a base gasket, how are you changing the cylinder volume? The cylinder does not move, only the piston. Therefore the cylinder/chamber volume stays at a constant. Zero deck height with a base gasket is still zero deck height. Therefore there is no gasket cc loss on the top.
2nd January 2005, 21:50
Craploads of factory black ones on e-bay. If I mess it up, it's only 20 bucks away. :D
2nd January 2005, 22:22
You are correct. No need to figure the base gasket with a zero deck height. Now I can't remember how I figured it for mine.. I will do the math again to be sure.
2nd January 2005, 22:35
At .070 that's some pretty think gaskets. Do you remember which head gasket you used?
I have a factory paper base at like .010 and Cometic .030 head gaskets. Well until I pulled it apart. Now I have to wait until I get the heads done to decide where to go now.
2nd January 2005, 23:57
Ok... Just checked my notes. It was a total of .070 James Gaskets. The head gasket is .045 with a .042 crush height. When I plug that in with a minus 8 cc for the dish piston, I get a CR of 9.75:1. The problem is… I don't know (or can't find) the cc of the dish on my Ross pistons. Here is a pic of piston. It has a different profile then the SE or Wiseco but I need to figure it out. Or just wait until I break it in and do a compression check. I would like to see 145 PSI to 165 PSI for a street-able bike. I like that 9.75:1 better…. What do you think??
3rd January 2005, 00:55
Let me know how BOTH bikes work out so I know which way to go with mine.
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