 904 questions
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Joined: Apr 2012
Posts: 124
Adjunct
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OP
Adjunct
Joined: Apr 2012
Posts: 124 |
For those of you that have done this could you please tell me what all needs to be done and how much of a performance gain did you receive from it?
thanks.
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Re: 904 questions
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Joined: Mar 2007
Posts: 5,616
Check Pants
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Check Pants
Joined: Mar 2007
Posts: 5,616 |
I didnt do a 904 but I did do the High compression kit. Same labor. You basically dismantle everything down to the pistons. Carbs off, exhaust headers off, head off, pull cylinders up (also referred to as jugs but not as nice to handle), remove pistons from rods. Reassembly is reverse. Stackas Dyno thread has a ton of results but it looks like something isn't right with the PDF files now. Ill see if I have a copy and can report it there for everyone. UPDATE: Dyno Thread link ... go to the last page. I posted pics of the document for reference.
Last edited by Zmilin; 11/27/2012 7:00 PM.
SOLD: 07 Black BA, 39mm FCRs, TPUSA stage 1 head, TPUSA 813 cams, TPUSA 10.8:1 pistons, TTP #3 igniter, Specialty Spares Long Cannons, Tsukayu Hard Bags. 82HP/55tq
NEW: 19 Goldwing Tour DCT
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Re: 904 questions
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Joined: Aug 2007
Posts: 10,736 Likes: 7
Should be Riding
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Should be Riding
Joined: Aug 2007
Posts: 10,736 Likes: 7 |
What needs to be done? Buy the parts and take it to your mechanic.
What did I do? Port/polish the head, +1mm oversize valves, Barnett clutch plates with heavier springs, stock carbs bored out 3mm, and new billet intake manifolds port matched. I'm showing 78.5rwhp top end on the dyno with torque in the upper mid 50's all the way across.
Always remember to be yourself. Unless you suck. Then pretend to be someone else.
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Re: 904 questions
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Joined: Apr 2012
Posts: 124
Adjunct
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OP
Adjunct
Joined: Apr 2012
Posts: 124 |
i appreciate it guys. how much money am i looking at?
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Re: 904 questions
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Joined: Jul 2011
Posts: 2,212
Oil Expert
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Oil Expert
Joined: Jul 2011
Posts: 2,212 |
Just do the filter removal (go to pods) , AI removal, change the manifolds to the billet ones, good exhaust, tune it well and enjoy :-) if anything i think the FCR wouldbe a good investment, one i am still considering. I have ridden Marty's 904 with fcr and i admit it goes like jack the bear but not sure i would spend another 2500 or 3k to get there.
2007 Speedmaster and miss it!
2013 T-Bird Storm and Luvin it!
Catching a yellow jacket in your shirt at 70 mph can double your vocabulary
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Re: 904 questions
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Joined: Mar 2007
Posts: 5,616
Check Pants
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Check Pants
Joined: Mar 2007
Posts: 5,616 |
Quote:
i appreciate it guys. how much money am i looking at?
Check here for a comprehensive kit
TPUSA
I'd also call and talk to Carlos. He's the man!
SOLD: 07 Black BA, 39mm FCRs, TPUSA stage 1 head, TPUSA 813 cams, TPUSA 10.8:1 pistons, TTP #3 igniter, Specialty Spares Long Cannons, Tsukayu Hard Bags. 82HP/55tq
NEW: 19 Goldwing Tour DCT
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Re: 904 questions
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Joined: Aug 2007
Posts: 10,736 Likes: 7
Should be Riding
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Should be Riding
Joined: Aug 2007
Posts: 10,736 Likes: 7 |
Quote:
i appreciate it guys. how much money am i looking at?
you should be able to get in your base model 904 for under $1500 installed, extras are extra, of course 
Always remember to be yourself. Unless you suck. Then pretend to be someone else.
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Re: 904 questions
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Joined: Jan 2008
Posts: 1,176 Likes: 15
Learned Hand
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Learned Hand
Joined: Jan 2008
Posts: 1,176 Likes: 15 |
I would say that if you don't do the cams you will not get much out of the 904
05 speedmaster - 1100cc, 11:1 racing pistons, Carillo rods, thunderbike cams, ported and polished head, 2mm over intake and exhaust valves, Barnett kevlar clutch, scepter pipes, oversize manifolds, 45mm HSR's, TTP stage 4 firestarter
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Re: 904 questions
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Joined: Feb 2008
Posts: 2,671 Likes: 15
Loquacious
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Loquacious
Joined: Feb 2008
Posts: 2,671 Likes: 15 |
Quote:
I would say that if you don't do the cams you will not get much out of the 904
I tend to agree for an 865, however a 790 should be good with stock cams. Which version does the OP have?
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