Fizzyhair
Adjunct
Reged: 11/16/11
Posts: 136
Loc: Cornwall, United Kingdom
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anyone who's done an 865 was it worth it, what kit did you fit and what would you fit if you had to do it again?
Thanks ladys and gents xxx
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Quick! There's time 2B Wasted! :-P
2007 America
Harley FatBoy Short Pipes
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Zmilin
Saddle Sore
Reged: 03/02/07
Posts: 5109
Loc: Sammamish, Washington - USA
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I haven't done the big bore yet but here is the thread with my current build info (Carbs, cams, head work, high compression 865 pistons and TTP igniter) Zmilins build
If given the option to do it all again I would. If not for my mistake and bending my valves the install was, to me, easy.
A 904 BB will gain you more torque over the 865 even with the minimal cc increase. Still worth it and its really the only bolt on big bore you can do without machining the cases.
You want a bit more, you wanna feel like your getting some ccs for your money... go with the 994 big bore. The only dyno Ive seen for that is on an EFI bike but it got him up to 80hp/63tq. 994 EFI BB
Whatever you do my recommendation is TPUSA for your performance needs.
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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
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Fizzyhair
Adjunct
Reged: 11/16/11
Posts: 136
Loc: Cornwall, United Kingdom
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What kind of machining? We talking new studs etc or just widening the hole?
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Quick! There's time 2B Wasted! :-P
2007 America
Harley FatBoy Short Pipes
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Zmilin
Saddle Sore
Reged: 03/02/07
Posts: 5109
Loc: Sammamish, Washington - USA
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Opening up the lower case to accept the bigger barrels.
I learned that our barrels actually slip into the top case. Theres a couple inches of sleeve that extend down past the casing. With a bigger bore there needs to be clearance but it does not seem to be as simple as just opening the hole. Looks like there is a lip to machine as well.
Ill know more this winter and cant find the thread with pictures (on another forum - triumph rat.net).
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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
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marty
Learned Hand
Reged: 03/23/08
Posts: 1151
Loc: Alberta,Canada
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I've got the wiseco 904,cammed,freaked and exhaust.The difference between that and stock 865 is day and night(got a spare in garage)I'm in the process of getting head work done but not sure if I can go bigger on the valves.Getting conflicting storys as to weather or not they will hit the pistons.So if Iwere to do it again,I'd make sure to use pistons that I can use bigger valves.Oh I got some FCR's comming in the mail too. good luck,Ill let you know what happens.
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The_Dog33
Fe Butt
Reged: 02/01/07
Posts: 16982
Loc: NE PA USA
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I was thinking just higher compression pistons and 790 cams would do the trick on an 865 engine.
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I learned all I need to know about life by killing smart people and eating their brains.
Eat right ,Exercise ,Stay fit, Die Anyway!
some shots of our bikes
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Zmilin
Saddle Sore
Reged: 03/02/07
Posts: 5109
Loc: Sammamish, Washington - USA
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Quote:
I was thinking just higher compression pistons and 790 cams would do the trick on an 865 engine.
If you can find 790 cams. Seems like when your looking you can't find em.
On the other hand the TPUSA 865 HC kit is under $1000 and has everything needed including cams (exchange of course)...
My kit went in at 31000 miles (just and FYI).
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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
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Fizzyhair
Adjunct
Reged: 11/16/11
Posts: 136
Loc: Cornwall, United Kingdom
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Post deleted by Fizzyhair
--------------------
Quick! There's time 2B Wasted! :-P
2007 America
Harley FatBoy Short Pipes
|
Fizzyhair
Adjunct
Reged: 11/16/11
Posts: 136
Loc: Cornwall, United Kingdom
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How do you find it?
--------------------
Quick! There's time 2B Wasted! :-P
2007 America
Harley FatBoy Short Pipes
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The_Dog33
Fe Butt
Reged: 02/01/07
Posts: 16982
Loc: NE PA USA
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As Z said, seems the TPUSA HP kit is the way to go rather than the BB on the 865 and more cost effective. If you can get cams and high compression pistons and I imagine gaskets for under $1,000 all in one spot that is the way I would go.
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I learned all I need to know about life by killing smart people and eating their brains.
Eat right ,Exercise ,Stay fit, Die Anyway!
some shots of our bikes
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