View Full Version : Question about XB9 work
21st April 2006, 01:32
Say someone came in and had you put axtell 3 13/16" cylinders in an xb9r (the ones you use for the 88") what type of performance would you see from the xb9r vs the xb12r with an 88" kit? have you guys done this.
Retaining the short stroke seems like it would be a positive thing
21st April 2006, 05:45
Well, here's an XB9 with an 88" kit, Red Shift 585 cams, bored XB9 throttle body, and Force pipe:
An XB12 with the 88" kit would run the same except the rev limit would be 6800.
By comparison, here's an XB9 with the 1200 kit (3-13/16 cylinders) and the same Red Shift 585 cams, bored throttle body, and Force pipe:
21st April 2006, 05:52
whats the price on the 88" kit for the xb9 with machining service?
21st April 2006, 11:34
Take a look here for the different flavors of the 88" kit:
This is the XB12 page but these kits also fit the XB9 if you buy a new XB12 flywheel assembly. Off the top of my head, I seem to remember the flywheel assembly runs just under $600.
One thing about either of these kits, you need a way to map the injection. Both of the above bikes are fitted with Power Commanders. Power Commanders are no longer available for Buell XB models (technically they never were, we used Buell X1 versions) although you can for the moment still get them on Ebay:
But to be honest, the PC doesn't work well on the Buell in the closed loop part of the map, i.e. low rpm. So transitioning off idle, pulling away from lights, etc, you could never get them to pull as cleanly as you'd like.
TechnoResearch has come out with a new tool, though, that lets you remap the stock ECM instead of using the PC (the PC is an augmentation box that simply intercepts the pulses going to the injectors and allows you to alter their duty cycle). They work really well. It runs about $250 per "key". It's one of these deals where you buy the hardware once and every time you want to tune a bike with it, you call TechnoResearch, read off the VIN, and they sell you a software key that allows you to tune that particular bike.
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