AngryGnome
Well-known member
- Joined
- Jul 1, 2012
- Messages
- 140
I hope you put an 1125 in an xb chasis for your next project.
-
You are currently viewing our boards as a guest which gives you limited access to view most discussions and access our other features. By joining our free community you will see less advertisements, have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is fast, simple and absolutely free so please, join our community today!
If you have any problems with the registration process or your account login, please contact us.
The XB4R build begins...
- Thread starter buellxb9rs
- Start date
Help Support Buellxb Forum:
buellxb9rs
Well-known member
- Joined
- Jun 11, 2012
- Messages
- 1,334
We had a blast and wanted to do something different. I can tell you, yes one cylinder less makes a huge diff. I've sat on this bike and it's light. A huge difference from my xb9.
rockerphotographer
Well-known member
- Joined
- May 17, 2011
- Messages
- 198
I want to see the final hp/weight ratio. Maybe you could be close to ninja 250 weight! It would make an interesting track day machine. Sometimes, less power is better.
I'd like to see a video of this passing up liter bikes in the corners....
I'd like to see a video of this passing up liter bikes in the corners....
What kind of hp and torque does the blast make? I'd assume roughly half what the xb's make, right? JW if saving the weight of one cylinder which I'd guess is less than 50 lb is worth ~45hp?
Cool either way, and if it's what you want it's all good, JW for my own curiosity...
Cool either way, and if it's what you want it's all good, JW for my own curiosity...
buellxb9rs
Well-known member
- Joined
- Jun 11, 2012
- Messages
- 1,334
The blast actually only makes 35hp, but the blast has the same bore and stroke as the 9 and has a lower compression piston. So essentially I would expect the bike to have about 40-45hp and about the same in torque and weigh about 50lbs less than a 9. But we shall see once this bike is done. I'm just going to order another wiring harness and screw messing with the one I got.
nikfleisch
Well-known member
- Joined
- May 2, 2011
- Messages
- 1,167
@ANGRYGNOME.....that's my dream bike, power and short wheel base for handling, I'd imagine it would probably almost be to short for that rotax....
email me more detailed steps if you can because i am very interested in doing the same thing. but would like a parts list and instructions if you can ind time. thank you. [email protected]
Any updates on the bike?
You mentioned some extra work for the primary cover " primary cover isn't exactly a direct fit", can you let me know what you had to modify on the primary cover.
I want to make my own rear sets for my Blast and was thinking of using the XB primary cover.
You mentioned some extra work for the primary cover " primary cover isn't exactly a direct fit", can you let me know what you had to modify on the primary cover.
I want to make my own rear sets for my Blast and was thinking of using the XB primary cover.
buellxb9rs
Well-known member
- Joined
- Jun 11, 2012
- Messages
- 1,334
I've got to get the bike to a shop to do a few things for me. As for the primary cover, the shift shaft hole has to be changed out to fit, I believe I used parts from the blast to make it fit, one bolt is missing compared to the blast vs xb so you can either bypass it or have material added to the case and tapped to fit the bolt.
P3_techman
Well-known member
- Joined
- Aug 20, 2011
- Messages
- 367
Yerp... That sucker is a big 'un.
My dream bike would be an XB1125SXcr with the 1125R front fairing. With only an open pipe for an exhaust. Ha! I wonder if it's even possible to fit the damn thing inside the frame.
This build looks like it will be LOADS of fun to ride as well. I wanna see it done! With track footage!
jetlee
Well-known member
My Rat Blastard weighed in at 340lbs wet. Factory spec is 360lbs dry, plus ~21lbs of fluids to make it "wet" (17.5lbs gasoline + 3.68lbs oil). That means I've eliminated ~41lbs from the bike; although I've gained about 10-15lbs myself since the process started.
It's getting fuel injected soon to go with the XB head/piston/cams. Dyno will be shortly thereafter.
Waiting to see what this project weighs.
It's getting fuel injected soon to go with the XB head/piston/cams. Dyno will be shortly thereafter.
Waiting to see what this project weighs.
jetlee
Well-known member
Since this thread died, here's my progress:
Custom axle is being turned and will have it road-going by February.
Engine is EFI and runs fine (been EFI for a couple years now). Front end and electronics are all squared away. Just need to add a couple heim joints, foot controls and rear axle. Already put on a new drive pulley and have a belt fitted, just haven't taken new photo.
Custom axle is being turned and will have it road-going by February.
Engine is EFI and runs fine (been EFI for a couple years now). Front end and electronics are all squared away. Just need to add a couple heim joints, foot controls and rear axle. Already put on a new drive pulley and have a belt fitted, just haven't taken new photo.
njloco
Well-known member
It's cool that your still after it !
jetlee
Well-known member
Nope. Kept procrastinating, then the nearest dyno closed shop. I've since moved and am close to some other Buell guys with a dyno and FAST Buells, so I'll be taking it there once it's ready. They're eager and waiting for me to finish, want me to go LSR with them.
This is their Blast:
Somewhere close to 80hp, if he hasn't topped it yet.
and their S2:
1250 with turbo and nitrous
They're pushing me to boost it, but I need to get it road-worthy as it sits, then I'll sort out the turbo and head for the salt.
Last edited:
