Xb9 main differences about the year

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08-08-2020, 10:50 PM
chevy350

Xb9 main differences about the year

Hi guys
I'm here again for another question.
How are the main difference by the production year for the Xb9?
I know it' s a bike with short stroke.
Some year are to weak instead the the other?
There are year to avoid?
Thank you.
08-12-2020, 10:06 PM
Fredrikrosen

I am no expert, but i did read on some forums that the XB9 seems to be a good solid engine. I think the XB12 (maybe also XB9) got a redesigned crank pin and oil pump in 2007 or 08. Google and alot of info are available.
08-12-2020, 11:33 PM
outthere

08' I believe. Big pin crank & improved oil pump gear
08-23-2020, 04:49 PM
Cooter

The '03 belt system should be upgraded to '04-up
All XB Buells got the Thunderstorm engine in '08 but they are all plenty reliable if treated with even the most basic of maintenance:angel:
08-23-2020, 07:35 PM
Fredrikrosen

Quote:

Originally Posted by Cooter

The '03 belt system should be upgraded to '04-up
All XB Buells got the Thunderstorm engine in '08 but they are all plenty reliable if treated with even the most basic of maintenance:angel:

Is it enough to use the upgraded version of the 2003 belt? Does not a XB9S -2003 have the Thunderstorm?
08-23-2020, 07:52 PM
Cooter

Quote:

Originally Posted by Fredrikrosen

Is it enough to use the upgraded version of the 2003 belt?
There is a superceded belt for '03, I don't think it's considered the "upgrade" to '04-up, pulleys and belt. Not mandatory, it doesn't seem to be a time bomb or anything, but was upgraded by the factory in '04 for a reason.

Does not a XB9S -2003 have the Thunderstorm?
The Thunderstorm engine was put into all '08 and up XB's. It has the bigger crank pin and upgraded oil pump design. IMO the earlier engines are totally fine and take quite a bit of abuse. If it's worth it to you, get one. If not, no big.

https://www.youtube.com/watch?v=Q3BcMKN-2Nk&t=13s