| Author | Message | ||
     Qoatis |
I blew the bottom end of my 03 xb9r and now i have to get a new crank, etc. I would like to make a little more power since the xb9r is seriously underpowered. i want to get some headwork and a 1050cc kit or would i do better by just installing a '08 xb12 crank to stroke the engine... don't want to spend too much since i am about to buy 2 more bikes. any advice and info would be appreciated. | ||
| Court |
There are several firms, a couple of whom are badweb sponsors, who are eminently qualified to listen closely to what you want/need and suggest a well balanced package that will do precisely what you want. | ||
| Reepicheep |
If you really mean the XB9 is "seriously underpowered" you probably ought to move on to another bike (1125R) or another brand. Your XB9 was probably making 76 RWHP. You can probably get it to 100RWHP, but if 76 was seriously underpowered, you probably won't be thrilled with 100 for what it will cost you. Go to an 1125R and have "the Buell thing" with 135 RWHP, or go to an R1 and get 180. If power is your sole decision criteria, there are manufactures that will be happy to pander to you. If you do stick with the XB, I would recommend sticking with the 9 crank. It has less stroke (and less displacement that way) but it can rev a lot higher, and get there faster. So go with as big a displacement as you can get (1050 with stock cases, more if you bore them) but the shorter stroke. That would be my approach. I followed XB12's WOT at the rear straight at mid ohio on my XB9 (stock exhaust and ECM). They slowly walked away from me (literally were out accelerating me at a pace about a walking speed). Nice power if you have it, but not something I would invest a lot of money to achieve. | ||
| Qoatis |
THANKS I'LL GO WITH THE 1050 KIT AND 9 CRANK CAUSE I LIKE TO REV IT...I JUST DID'NT WANT MY XB TO FEEL THE SAME WHEN I GET IT BACK RUNNING, CAUSE NOTHING CAN HANDLE LIKE THE XB. I'LL BE PICKING UP A 08 HAYABUSA FOR MY POWER FIX AND THAT NEW KTM RC8 1190 WHEN IT COMES OUT,,,,BUT I CANNOT PART WITH MY XB! | ||
| Court |
If pure power is what you want the Hayabusa is a good starting place. My riding partner has a Superbusa and the damn thing scares me just to look at. . . you can dump $15K in one of those things in a heartbeat. | ||
| Alessio66xb12r |
Quoatis i like the idea of stay with your 9 crank but if you MUST open the cases and you Must buy some parts to rebuilt your engine go with a 1170 and a good heads job it does'nt make a big money differences but is a real BIG improvement respect the stock 986 the 1050 does'nt make a so big gain. bye Alessio | ||
| Reepicheep |
Let us know what you did and how it worked out Quoatis! Sounds like a fun project. | ||
| Qoatis |
i'll keep u all informed....thanks for all the advice! | ||
| Jon |
The opinion by Alessio66xb12r seems to be from experience. That opinion should be considered as well. Thanks for contributing to this discussion, Alessio! | ||
| Bad_karma |
Quincy Since your splitting the cases go with the 1170 keeping the 9's stroke. Get some head work and cams. Joe | ||
| Qoatis |
YEAH I'LL BE GIVING REVPERF A CALL PRETTY SOON....JUST GOT THE GO AHEAD FROM THE WIFE.... I'M GOIN ALL OUT WITH THE 1170 KIT!!!!!!!!!CAN'T WAIT TO GET THAT FRONT WHEEL IN THE AIR! | ||
| Blake |
Are you planning to do the work yourself, or are you going to send them your engine for a turnkey job? | ||
| Jimidan |
Might I suggest that you have the engine completely blue-printed in the process so as to make it as reliable as possible. The extra HP/TQ and built-up valve train puts a lot of stress on these and other components. There is more to building the kind of engine you seem to be talking about than assembling parts, that only experience and a very good machine shop can handle. Take it from a guy who has two 88" engines. | ||
| Qoatis |
i'll be sending them the engine....i'm a therapist and i don't have the time to tackle the job myself. | ||
| Blake |
Excellent decision. | ||
| Panic |
I'll agree that having extra RPM is nice and certainly an advantage for maximum power if the displacement is the same. However, for practical street use, the XB9 at the same level of inertial stress is only turning about 1,000 RPM higher than an XB12: 8,658 vs. 7,651, both at 130,000 f/s/s. The max speed isn't the direct proportion of stroke lengths or piston speeds. How often do you use 8,600? | ||
| Qoatis |
All the time...I live at redline! | ||
| Buellrcr |
put 12 flywheels 9 pistons and micron exhaust tunable ecm u can get 98hp and80 ftlbs toqure |
