best Engine Mods for a Buell xb 12

[Angelz]

hey guys
what would you say are the best engine mods for a buell XB 12 for example i see BakerDriveTrain have a 5 speed smooth shift kit (link Below)

looking for some more engine mods

https://bakerdrivetrain.com/collecti...ooth-shift-kit

[Cooter]

I'm getting a sense of Deja-vu...


That won't work on an XB. It says so right in the description of fitment:
"1991-2003 Sportster & Buell (except XB9 & XB12 Models)"

[Silverrider]

ok here you go , 1426 cc (87 in3) Engine mods consisted of:

· S&S lightened & balanced crank assembly, 3 13/16” stroke

· Zippers Flywheel scrapers

· S&S forged steel rods, 7.44”

· JE forged and coated 3 13/16” pistons. 11:1 CR

· Axtell nodular iron cylinders

· STD race heads ported by R&J Performance

· S&S 345 Intake manifold ported by R&J Performance

· Manley valves

· Isky springs

· Jim’s roller rockers

· Red Shift 585 cams from Zippers

· Zippers lifters, blueprinted and travel-limited

· S&S adjustable pushrods

· S&S Shorty G carb with Zippers Thunderjet kit

· K&N air filter

· Velocity stack intake to carb

· Dyna 2000 ignition

· Murdoch Racing blueprint & undercut European transmission

· Barnett clutch

· Buell Pro Series Competition exhaust

· Result: 106 HP and 92 ft-lbs at the rear wheel on the Cycle World dyno

[Cooter]

Pics or it didn't happen

[Silverrider]

Pics or it didn't happen

https://www.ebay.com/itm/1998-Buell-...wAAOSwi19a-FzV

[Silverrider]

https://www.ebay.com/itm/2003-Buell-...pbFCW4&vxp=mtr

Stock XB frame with sliders welded on
Stock XB swingarm with chain drive conversion
Penske rear shock
After market Billet triple clamps
Revalved front forks
Steering stabilizer
Woodcraft clip on bars
Woodcraft rearsets
All carbon bodywork (some repairs done)
Carbon ram air and oil cooler
8 piston front brake caliper
Quick release front brake fitting
Stock XB wheels powder coated black
Aftermarket front brake rotor
New Pirelli tires
Steel braided brake lines
Radial pull front master cylinder
Battery Tender Lithium battery
Custom work done to rear subframe
Large oil cooler
Steel braided oil lines
Autometer tach
K&N filter with carbon top
Beasley all stainless exhaust ( only available to Harley factory teams)
Stock XB cases bore out to accept larger cylinders
Stock crankshaft with a lot of weight removed
Millennium cylinders
Weisco pistons 14-1 compression
New piston rings
Ported heads with stainless valves
New Conical valve springs with Titanium retainers
New valve stem seals
Oil return line mod. for cylinder heads
Port matched throttle body
Fuel lines with heat shield wrap
Stock wiring harness and computer
Stock charging system
Slider clutch
Comes with extra rear sprockets and assorted parts

[njloco]

Yeah, and if it's not running good it's a nightmare on two wheels to figure out, if it s running good, it's a nightmare on two wheels to keep it running well. Most worrisome to me would be the crank being made lighter, in 08 they made the crank stronger ( heavier ? ) for extra strength. If someone does there own work and builds this, they know what they put into it and where the trouble spots are, if any, I've learned to stay away from stuff like this unless one is an expert or needs parts.

[badmotorscooter]

That's a lot of $$$ for about 30HP, a person must really love their machine to spend that kinda money.

[airbozo]

I love my sporty enough to modify it. (89" stroker kit, 96hp, 101 ft-lb's at the rear) but like njloco says, you have to know what was done to the bike or someone else working on it will not be able to keep it running right (I have a detailed list and always take it to the same guy who did the work). Yes it was costly, but Santa Cruz HD's bankruptcy saved me 80%. (not as costly as the modes above)

[Cooter]

Don't think of it as 30hp. Think of it as 30% more HP and it starts to make sense.

But, ya. The last decade has made HP cheap and reliable. Crazy you can buy an almost 800hp(!!!) daily driver for way less than 100k.

A good friend just had this built last year. It's only a 477ci BBC but makes over 3100HP!!!! 6.5hp/ci is a stunning number.

https://www.youtube.com/watch?v=W7Qu9-SFcD0