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View Full Version : 90ci big bore kit



Dusty91
06-05-2015, 04:57 AM
I have owned an 04 xb12r for a year now, I love the bike great power but I am wanting to get more out of it. I would like to do the 90ci big bore kit, i was wondering if anybody has any info on things that can be done to beef up the lower end and any info on bigger cams, the tunning etc. I want the bike to have some longevity to it so I'm assuming beefing up the lowering is a must. Any help would be awesome thanks

08herobolt
06-05-2015, 11:03 AM
Darkhorse Crankworks, in my opinion, will be the best option. Expect to pay for quality.

lawdog
06-05-2015, 02:27 PM
Email Hammer Performance and follow their instructions..... Search on here and Badweb for experiences of other people. You are looking at spending a fair amount as this would be a complete rebuild.

theMelvster6
06-06-2015, 10:13 AM
if you do the 90in kit, got with the axtell iron cylinders. they help keep the strength in the spigots where the cases have to be machined.