New to me 2006 XB12s, minor cleanup and adjustments, some input could help

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The LEDs have a few hours on them now and so far so good, they light every time and are worlds better than the yellow candles that were in there stock. I found a set of mirrors and they work nicely, and have integrated turn signals.

The 1450 kit, or whatever they call it, requires case boring and extensive ECM running. Headwork, fuel regulator and different injectors would probably help the set up too. However, From what I was told, when I purchased my 1250 kit, it's not the most friendly set up for a daily driver. And like I said, it's very hard to get the set up tuned right. I went with a 1250 kit, cams and headwork because this set up works very well with my Buell race ECM. Aside from a TPS reset and timing, I haven't had to mess the electronics or fuel management.

I don't mind spending the money or the effort to go with the bigger displacement kit, but what concerns me is the tuning solution. The company selling it seem to be rooted in the carb world and make no mention of the Buell's EFI tuning needs, I'd rather see a tune offered with the kit. What I am hoping is that members on this board have gone this route and can give some feedback on the tuning solution.

About your 1250 kit though, was it "worth it", it seems like such a small change in displacement? How would you characterize the performance gain? What headwork and cams did you use?
 
I'll give you the same advice I give everyone on the breather reroute.

I'm going to assume the two breathers are connected to a t with ⅜ fuel line. Get another piece of ⅜ fuel line and run it from the t down behind the left rider foot peg. Then take the filter you are planning to relocate and any sort of catch can or device used to contain and throw them in the garbage.
 
Stage 2 headwork and 540 cams. I also had my flywheel lightened and balanced. That was done by another company. Darkhorse crankworks.
The acceleration is worlds apart from stock. The engine feels so much stronger than it did previously. There's really no major noticeable gain other than the sheer acceleration. I haven't had the bike on a dyno but I'm fairly confident that I'm making a reliable 105hp at the rear wheel.
I'm pretty sure I have some ponies lost in my lack of tuning but I'm not one to mess with the ECM. It works good enough just the way it is.
I don't know of anyone on here that has gone with a big bore kit. I think you'd have to sink twice the amount of money into tuning the thing than you would machine work. Especially if you don't know how to do the tuning yourself.
There's a fella on here by the name of phelan. He has a Uly with a 1250 kit, headwork, cams and a full exhaust. I believe he works for NRHS.
I hope he chimes in cause I'm sure he'll be much more informative.
All I know is that my build has been going strong for about 13k and I'm quite satisfied with what I got. Sure, i could have bought a nice used bike with the money I sunk into mine. A little over $3500 and that's with me doing all the wrenching. I wouldn't have MY bike had I gone that route. I'd have someone else's problems.
I didn't do my build simply because I wanted more power. My crank bearing failed so I had to either rebuild my motor or buy a used one. I didn't feel comfortable buying a used one knowing that it too could suffer from a bearing failure. So, I decided to upgrade mine.
 
Thanks for replying! I have always loved sport bikes, and Harley engines, and the Buell is really the perfect bike for me. I am not trying to turn it into something it isn't, if I wanted the fastest thing out there I would just get a Busa and turbo it which could be done in a weekend and there are tons of resources ready to go. What I plan to do is study what my options are then plan a build and do it. Forced induction is tempting, and I have seen a few one off builds done, but I think I would want to pick up a second XB to go that route. For this one I want to have stock manners and reliability just with more power.
 
I had a very productive discussion with the guys at Hammer Performance, they said that their parts fit the Sportster of which there are many, but also fit the Buell that are rare and decreasing which makes a software (tune) uneconomical. That made me think, why fight the Buell ECU when a sportster ECU and harness is apparently capable of supporting all these mods. Why not just grab a Sportster ECU/harness/sensors/etc and run the same metal with the right electronics?
 
Big progress was made today, I started the motor with its new build! Pics will follow of course but for now it is boring old text. After allot of thinking about it I decided to do a middle of the road build since I have the EBR for the big power bracket. I wanted a strong runner but with good reliability for longer trips. I went through Hammer Performance for everything and they put together a complete package. The porting looks awesome with a clear visible difference in shape and lack of obstructions.

My build is: 1275cc cylinders/ pistons
Cometic gasket kit
Crush head porting (7mm valves, 1.900 intake, 1.610 exhaust, conical springs, titanium retainers, 30deg squish band)
605/591 cams (some clearancing was needed for the bearing race but a nice fit)
3/8 hammer pushrods
Throttle body port/match
And I threw in some other bits like new wires, plugs, new oil pump gear, header wrap, and I already have the K&N and Drummer

Assembly went well and I did the 10/20/30/40 second run and cool cycles hammer calls for and tomorrow I will do the 1 and 5 mile rides with cool downs and then start working through the break in period.

Tuning will be the big question. The bike had a stock tune with a K&N and Drummer as the only mods and the cylinders/pistons looked about average for the mileage having some carbon and no sign of detonation, plugs were healthy as well. I am going to try the Drummer and race tunes that are out there and see how they look on the wide-band (just need to install a bung). If none of those are satisfactory I am going to look at swapping to Sportster electronics which are supported by a galaxy of tunes and tuners, the biggest difference I see is how the motor gets its timing knowledge and that would be easy to reproduce. The only surprise I had was I found the idle cable was fraying at the throttle body and I have a new one on order. And while the bike was apart I replaced the remainder of the plastics with carbon fiber.

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