| Author | Message | ||
     Firebolt020283 |
does anyone know if the 1250cc for the xb12's would fit on the xb9r. | ||
| Buellgator |
No you would have to change the stroke of your bike to the 12s stroke and that comes with a whole other set of •••• to deal with. Like lowering your rev limit. | ||
| Hobanbrothers |
Cylinders are the same, compression changes and you would need the correct piston to get you at your desired compression. It turns it into a 1050cc. You can put a XB12 flywheel assembly into your 9 also if you would like to get to the 1250cc displacement. | ||
| Firebolt020283 |
hobanbrothers maybe u can help me then since have pretty good knowlage on the bike is it possible to get my 9 to run 130hp | ||
| 420at145mph |
isnt there a 1200 kit for the 9? | ||
| Firebolt020283 |
yea there is but i was just curious if the 1250 would fit | ||
| Hobanbrothers |
Yes it is, but 130RWHP will cost you a lot of money and shorten the life of your motor. You still in?? | ||
| Firebolt020283 |
sure i got about 10,000 to spend on my baby and the motor cant last fore ever then i wouldnt be able to have a reason to rebuild it again | ||
| Firebolt020283 |
oh yea wasnt planning on spending that much on motor its self just to let every one know | ||
| Buellgator |
Hoban, you don't have to change your rev limit with the 12 flywheel in these things? | ||
| Hobanbrothers |
Buellgator--I am going to say no, but you really should not be using the rev limiter as the shift point regardless. If you are bouncing off the rev limiter every shift, wether it be a 9 or a 12, there will be consiquences. To hit it once in a while due to a mis shift with a 12 lower end in a 9 would-should not kill it, but it is not good regardless. Firebolt-I hope you did not take me wrong, it just costs allot of money to get there and they are highly strung at 130RWHP. There are other issues that come in at going for those numbers also, like tuning as most people are becoming aware of. Once you step off, the second step is a doozy! They sure are fun when you grab a mitfull though. Our race bikes are actually at about 118RWHP, with about 114 for Torque. We can get more HP if we run different cams and reconfigure heads which would produce more top-end HP, but low and midrange would then suffer for the bad. We race in a HP regulated class that we are pretty much topped out in. We continue to seek & find more mid-range torque, it really relates to streetability also, which is why we race! | ||
| Easyflier |
HobanBros, if I delivered my XB9R to your shop with $2500 what could/would you do to it? | ||
| 420at145mph |
and what could i get for 5grand? | ||
| Firebolt020283 |
ok well my question is would it be more concevable and smarter for me to run the numbers simuallar to that in my bike since im obviously not going to be using it somuch as a race as more of an all around bike ie show/strip/toy bike i want my bike to run as best as consivable all around 130 was just a goal i thought i would try for but id like to have low and misd range to so im just trying to find out what would be my best diretion to go hell i love working on bikes been doing it before i could even ride one (ok i just got my dad parts and tools at that age but still) and i want this bike to show for it so im just looking for alittle direction and thanks for the help so far | ||
| Bud |
i use to ref my little 9 to the limit now with the bigbore i'm a 6000 rpm shifter there's no need to ref it further just to keep it in the powerband it's the same with wot, i have to learn again for on the dagstrip to turn the trottle all the way...never have need it on the road and i very much like it | ||
| Firebolt020283 |
bud what did u bore ur bike out to just curious?? | ||
| Bud |
1200 cc millenium cylinders, with the crankcase bore need | ||
| Firebolt020283 |
whats ur 1/4 mile lookin like with that setup? | ||
| Bud |
¼ time don’t now yet… end off august is my maiden run getting fast off the line is the biggest problem with the 52” wheelbase so I’m going for a nice weekend and every time under 12.5 sec for me is a very nice time my mate in the other hand is bitten by the bug, and id turning his xb into a drag bike his first run ever he made 12.23 sec. And his best time was a 12.12 and he’s going to gear it for the ¼ mile with a longer rear swing ( he took off the line from 2e gear , but he can with his 100 lb/ft xb ) | ||
| 420at145mph |
how much did ur setup cost ya bud? im gonna do the 1200 thing this winter n wanna start pricing prices u went thru nailin right? | ||
| Bud |
Nrhs is a very good address for the job, Because I’m in the Netherlands I brought my engine to or local buell/harly wizard ( www.bikehospital.nl ) I mite ad he’s a very good wizard with a long rep sheet in porting/flowing the cost, I lost count @ 4ooo euro ( but that’s all the winter mod’s to getter ) I did a lot off work my self, taking the engine out and stripping the engine And some friend over here has cut me some slack So any price I give is not really a accurate view off what it really will cost It all deepens on what you want and what do you do your self, just give nrhs a call ! He will gladly walk you though the options I wanted low Tq not high Hp @ redline rpm’s ( 85 ft/lbs @ 5000 rpm ) And I really want it to be reliable and easy to drive with a nice and flat tq curve Gr,b | ||
| Hobanbrothers |
Easyflier, I see you have a PCIII already along with a couple of other upgrades, I would want info regarding what you are looking for and I prefer to do that stuff off line. We really try to tailor a motor to the wants and needs of a customer and have different versions depending on demands. | ||
| Easyflier |
HobanBros, I was trying to do exactly that. I emailed John 3-4 weeks ago. We were in discussion last fall about a winter project but things changed on my end and I couldn't follow through. Give me a good email address and we can discuss some details. Shifting gears a bit.  If you were going to build a streetable but strong XB for occasional track days would you want to start with an 9 or a 12? It seems like a 9 would be better because it already has a higher rev limit but those that have extensively ridden both claim that the 700 RPM lost on the 12 isn't a problem due to the increased torque and HP down low. | ||
| Firebolt020283 |
thats a good point easylifer though i dont know the answer i would go with u on the 9 | ||
| Aaron |
Some food for thought ...  Red: stock XB12 Blue: XB9 with NRHS 1200 kit, Stage 3 heads, & Force pipe (stock cams & throttle body) Green: XB9 with NRHS 1200 kit, Stage 3 heads, Force pipe, bored throttle body, Red Shift cams All results taken on the same dyno. edited by aaron on July 19, 2004 | ||
| Easyflier |
Aaron, you guys don't seem to reply to email either. Does Justin still work there? His email is the one on your website for contact info. | ||
| M1combat |
What about a 12 with stage three heads and a force pipe? Have you done that yet? I sure like that blue line though . | ||
| Easyflier |
Aaron, do you have a dynochart of a stock XB12 with the Force pipe? | ||
| Hobanbrothers |
Just checked our profile and it does have the right email, I am sorry for any inconvience, just make sure you put, "John, do not delete this" or "this is about motorcycles" I have to delete about 200 emails a day regarding my manhood or something else and sometimes some get booted by accident. Let me know... | ||
| Firebolt020283 |
ha ha ha at hobanbrothers and his email problems mine swers im an old bald guy that cant get it up and like porn (ok porns good sometimes) | ||
| Hobanbrothers |
PS I would take the blue line for roadracing, probably beef up the mid range a bit by cams, but overall, what you want is good pull out of the corners. We are in a HP regulated class, but even still, I do not worry about peak numbers in HP much at all. Don Tilley told me a long time ago that "what you want to do John, is just pull a couple of bike lengths out of each corner", total that up over a 14 corner track like RA and you get big gaps! I feel that has been our key to success, that and a very good rider and excellent sponsors. We set the pole at RA this year and Don told me that there 8 or 9 years ago. | ||
| Firebolt020283 |
just curious but how are yall doing this year if u dont mid me askin hoban brothers | ||
| Easyflier |
John, I'll try to edit the subject and resend the email. | ||
| Trojan |
Barry Sheene always geared his bikes for grunt out of corners rather than top speed, and he didn't do too badly either.. | ||
| Hobanbrothers |
Daytona was bad, broke a valve shim which got into oil pump on warm up lap. Elkhart Lake was good, set the pole, then Jeff jumped the start which penalized us a lap, so it ended bad, like 21st?? Then West Virginia, took 2nd place, then Loudon, NH. Took 5th with tires going away on us and similiar situation at VIR with tire issues, I believe 7th?? Now on to Barber... I believe we are 6th in points and about 4 points out of 2nd, so hopefully we can get there in Barber.. | ||
| Easyflier |
John, look for an email with the subject: John Don't Delete This Frickin' Email It's About Motorcycles |
