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Buellxb Forum

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Never said i wanted to compete with the two above mentioned bikes, what i said was i wanted more out of the bike i have so i don't feel like people are blowing my doors off. i would think that a 1203cc V-Twin would have a little more teeth maybe i'm wrong?

heck my little 600cc Triumph kept up better than this thing lmao. still love this bike though

am i on the street pulling this hooligan nonsense? Nope we have track in my town... but that's not saying that i havent pulled my share of crazy stuff, it is however one reason i have a sportbike "to actually ride it"

as far as equating this as a jeep against an C6 vette "please" it's a whimsical analogy but seems like just a trolling statement, if you have no suggestion then cool but come on man.

so i'm thinking that i need to do a chain conversion and play with the gearing, thanks for the info!
 
It's all about gearing, (and tire diameter), XB's don't have it no matter what you do to the engine.
 
You can always build a custom v-twin for your buell. With the right combination you can see 120-130 hp or more, 100-110 tq or more. It all depends on how bad you want it, and how much time you're willing to put into the bike.
 
Realistically, top end primary kit, and a chain drive. Head work and cams to help move your powerband more to the top of the rpm range. You won't be keeping up with bikes like those anyway. Can't solve the problem of only five gears.
 
The Xbs are Streetfighter Machines and you will need to really put some money into the Engine to Top End the Engine.About 3 to 4/grand done to withstand hard reving.You can Always Get Octopus[Tunversity] here on the Forum to Help you Retune the ECM for better Preformance.
That will help to get the most out of your Engine and Electronics. Always Reman an Engine with the best of parts before you Top it out[or] Race it so it won't blow up on you. Tuning will only get a rider so far but better than Stock and will Suprise you at how much the XB is Ready for..
That Said some Major Work on Suspension and Engine would need to be done. The Bikes are good Handling for Everyday Street Riding AND Stunts Galore SHE is a Stunt Mans OR Womans Dream Machine. Even in Stock Condition! Check out you/Tube. Hope you are using Good Synthetic Fluids for keeping the Engine Together.I build Engines a lot nowdays due to overiding 4/cylinders and V Twins as well.
Keeps bills paid! Try the Retuning process first.Wear your Gear and Ride Safe. If you need Speed then the Track Days are Safer and no Vehicles to contend with. Carefull on the Highways and good luck.*Jimi
 
as far as equating this as a jeep against an C6 vette "please" it's a whimsical analogy but seems like just a trolling statement, if you have no suggestion then cool but come on man.
Click to expand...

It's a valid comparison. The point being, it can be done, but it's probably cost prohibitive. Here's a Jeep Cherokee turning 8.9 in the 1/4, but it was a EXPENSIVE build.

My suggestion, sale it and buy a 1125R.
 
Thought I would chime in here. My friend is a HD/Buellers tech here in GA. He says a cam will put down some serious HP, then you HAVE to do suspension. If you really wanna go wild, there is a intake/exhaust kit that F1 cars use, I think its called a "rotary valve" conversation. It suppose to allow the enigne to Rev to 15k. That is EXPENSIVE, but will get you that Japan teeing bike.
 
Thought I would chime in here. My friend is a HD/Buellers tech here in GA. He says a cam will put down some serious HP, then you HAVE to do suspension. If you really wanna go wild, there is a intake/exhaust kit that F1 cars use, I think its called a "rotary valve" conversation. It suppose to allow the enigne to Rev to 15k. That is EXPENSIVE, but will get you that Japan teeing bike.
Click to expand...

Pretty sure that 15k RPMs can't be right.... I'm not sure what the redline is on an XB but my M2 tachs out at 7k. I have a hard time believing that swapping an intake will more than double the redline. I would believe that the the intake itself could support an engine capable of 15k RPM, but not increase the mechanical redline of an engine.

Redline - is the point where valves "float" meaning, the slack or clearance in the drive system (timing chain or timing gears) and weaknesses in the valve springs allow the piston to come up to or near TDC before the tension in the valve spring has a chance to close the valve (over revving the engine). Depending on how far past the redline the engine is rev'ed, the piston could actually come up and hit the valve (depending on application)

Note: I'm not an expert on the HD V-twin engine but I have:

1) ASE Master Technician (Auto and Heavy Truck)
2) built engines for race cars and hot rods
3) witnessed first hand what happens when you over rev an engine.
 
Recon, on top of that, the Buell engine uses a "odd" firing order. Something like #1 fires, 45* later, #2 fires, then "double" power stroke, exhaust stroke, compression stroke, cycle repeats. To compensate for the firing order the Buell uses a HEAVY flywheel. Spinning that much reciprocating mass to 15,000 RPMs would be difficult to balance.

Next up is the valve "float" issue you mention(also, valve bounce). This can be over come with stiffer valve springs, double valve springs also the Beehive valve springs. With a overhead valve engine the problem then becomes the hydraulic lifters are not designed to take that kind of pressure. This requires solid lifters. Solid lifters will require adjustable pushrods, which will require different pushrod covers so they can be adjusted.

Now, to make power, you're going to need more fuel and more air. That's going to take cams and injectors(and valve, and intakes, and etc etc etc) Cams are pretty limited for the XB motor, but you can use XL cams, you just have to ignore the timing marks on the cams and time them yourself. This brings us to fuel, and pretty much the dead end. There just isn't room in the 45* V twin to make any serious intake improvements. The XBRR got around this by melting the engine down, recasting it and offsetting the intake ports to make room for two separate throttle bodies.

If you've read all that, and want to spin 15,000 RPM and make 150HP, sale it and by a 1125R

with moderate building, IE 1250 bore kit, larger valves, header, higher compression pistons, tune, you can make I'd guess 120HP, some of the turboed/supercharged engines are making I believe 140HP. With a chain drive so you could gear a bit taller, you could get a little more top end with out sacrificing your low end. I'd wager in the $5000 neighborhood for a build. Turbo or supercharger, chain drive swingarm conversion I'd wager in the $6000??? neighborhood.
 
If your seriuos about this and have money to spend on it I would recomend a bolt on big bore with higher compression pistons, send the heads out and get them cncd and possibly bigger valves, and find a reputable tuner. No sense in doin the chain conversion and messing with the ratios until you do all the engine work first, if you gear it up too much for top end without the hp needed to run at those speeds it'll turn into a dog.
 
Wow now that's some info there!

I'm thinkin that as of right now i only have a little over 9K on the bike right so i'm gunna flog her until she can't take anymore then tear into the motor :D...

i'm still gunna look at the chain conversion since it looks to be on the cheap but may wait until this season is over, "who knows i'm ADD so shit may happen sooner" i live on oregon so the season is just starting and lasts like 3 minutes lmao dont want to miss a second of it!!!

thanks for the info from the ones that gave it [up]

the others "you know who you are" well??? silly kids chicken strips belong in baskets not on your tires lmfao
 
idk i mean i weight less than 140lbs and my xb12r just takes off because im a smaller dude...i also like iving so i tend to not be going 130mph+
 
idk i mean i weight less than 140lbs and my xb12r just takes off because im a smaller dude...i also like iving so i tend to not be going 130mph+
Click to expand...

Ha!this thread wont die lmfao!

I like living as well, that's why i tend to go 130+:D

it's just a different kind of living...
 

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