 modified America Performance vrs. 865 engine
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Joined: Mar 2006
Posts: 18
Complete Newb
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OP
Complete Newb
Joined: Mar 2006
Posts: 18 |
I have a question about the performance difference between a modified America vrs the stock 865 engine. With all the technical knowledge out there what is the general opinion.
Modified: America
Epco mufflers
AI out
Uni and air box drilled
130,42,TBS,2 shims
Would the performance be the same as a stock 865
or
would the addition of the Freak kit and different jets equal or surpass a stock 865
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Re: modified America Performance vrs. 865 engine
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Joined: Jan 2006
Posts: 7,693 Likes: 22
Monkey Butt
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Monkey Butt
Joined: Jan 2006
Posts: 7,693 Likes: 22 |
790 vs. 865? Both motors stock are so similar there is really no difference. A bit more torque on the 865 and more horses on the 790. I would be unwilling to bet on a head up drag race between the two stock bikes. 865 pulls a bit harder and the 790 comes on later much stronger.
Pipes, filter and the needles will certainly make it zippier then the stock 865. So, its already past the 865 before the freak.
I try to aggravate one person a day. Today may be your day.
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Re: modified America Performance vrs. 865 engine
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Joined: Jan 2005
Posts: 9,223
Big Bore
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Big Bore
Joined: Jan 2005
Posts: 9,223 |
I agree.
I can take any stock 865 without effort.
"Never underestimate the power of human stupidity" - Robert Heinlein
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Re: modified America Performance vrs. 865 engine
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Joined: Aug 2005
Posts: 2,726
Loquacious
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Loquacious
Joined: Aug 2005
Posts: 2,726 |
Do the 865s gain an equal benefit from opening up the exhaust, airbox, and carbs? A post I read earlier implied the 790s got a bigger boost than the 865s.
Bob
2005 America, 904cc - sold. 2014 Trophy SE.
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Re: modified America Performance vrs. 865 engine
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Joined: Jan 2005
Posts: 9,223
Big Bore
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Big Bore
Joined: Jan 2005
Posts: 9,223 |
Don't know for sure but I would love to run against one with similar mods! 
"Never underestimate the power of human stupidity" - Robert Heinlein
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Re: modified America Performance vrs. 865 engine
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Joined: Jan 2005
Posts: 3,753
Loquacious
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Loquacious
Joined: Jan 2005
Posts: 3,753 |
i would not worrie about any 865 unless it has a different set of cams
Frank
(Former)05 BA tbike pipes, ai removed, Freak, mikuni hsr 42's, 904, ported/polished head, 1mm oversized valves
NOW-2010 silver and black tbird
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Re: modified America Performance vrs. 865 engine
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Joined: Feb 2005
Posts: 70
Member
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Member
Joined: Feb 2005
Posts: 70 |
Quote:
i would not worrie about any 865 unless it has a different set of cams.
I'm with Frank on that one. When you start messing around with the internals, that is where you will get the most gains. i.e. cams, port/polish, big bore, engine balancing, larger valves, ect, ect.
04 Speedy, 904cc 12:1 CR JE pistons, ProCom CDI, Nology coils, Hotwires, lightened flywheel, CR ll's, 18 tooth front sprocket, freak kit, cocktail shaker and scypter exhaust, bobbed rear fender, headwinds headlight, wires in bars, and Scott Oiler
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Re: modified America Performance vrs. 865 engine
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Joined: Jan 2005
Posts: 6,308 Likes: 4
Worn Saddle
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Worn Saddle
Joined: Jan 2005
Posts: 6,308 Likes: 4 |
Bring on ANY 865cc, I'll make her cry!
A word to the wise is not necessary. It is the stupid ones who need the advice.
Pat
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Re: modified America Performance vrs. 865 engine
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Joined: Jan 2006
Posts: 435
Adjunct
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Adjunct
Joined: Jan 2006
Posts: 435 |
Quote:
Bring on ANY 865cc, I'll make her cry!
Ditto
TBA, Stainless extractors / drag pipes, 65mm over forward controls, Thruxton needles, 904cc, head ported, lowered 1-inch, Console removed, relocated battery box, Australia.
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Re: modified America Performance vrs. 865 engine
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Joined: Jan 2005
Posts: 4,932 Likes: 2
Loquacious
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Loquacious
Joined: Jan 2005
Posts: 4,932 Likes: 2 |
Pat- Thats not fair racing an 865 against the Magna!
we should do this every weekend!
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