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Now that winter is upon us, I am looking into upgrading my '09 Fatbob 96 to a 113. I am mainly looking for the boost in power that i do not have with the stock set up. Is this a recommended upgrade? I would like to get as close to the 120hp mark as possible, though not sure if there is a more relible upgrade for durability and power than the 113 or if this is in fact what i should go with. I do alot of riding, over 14k this year alone.
Any ideas out there?
Thanks
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A 107" drop-on kit is a viable option(your OE cylinders bored), but IF you are set on going bigger, then a 117" is would also work VERY well, as the cost is about the same in labor/machining, etc.
Scott
103/107 is just bigger pistons only, to go bigger than that the cases must be bored to accomodate the bigger cylinders that are needed to go with the pistons that make 113/117 with your 4 3/8 stroke crank in your bike now.
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08 SG 103" SE MVA Heads 251 Cams SE 58mm TB RB LSR 2-1
Also have been some QC issues reported with the 113 cylinders being out of round. Plus you need to have your cases bored. A good 107 build will come out cheaper, while still reaching your performance goal.
My .02, why settle for 113"? For the same cost you can go to 124" and easily get the power you are looking for. In my honest opinion (and I know others may disagree) if you can afford it, bigger is ALWAYS better.
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2009 BMW K1300GT
2008 Custom Bagger
124" S&S Single Bore, VFI, Rolling Thunder 200mm Frame
Baker DD6, Bub 7 True Duals, Dakota Digital Gauges
Brembo Brakes
The SE 113 cylinders and pistons can be had for a few hundred dollars ( i passed on a set for $250) if you watch ebay/forums. The axtell units go for quite a bit more. But as stated, you may end up needing to rebore the SE units and get new pistons/rings. That will surely eat up the cost difference. Either way you get what you pay for. If bigger than 107 is desired, I like the 117/124 option.
Is the 113 not a recommended upgrade? Is the 107" a less intrusive upgrade or still just as involved as going bigger?
NW,
As other folks have already mentioned, those cylinders are not round/straight from the Moco, as we have a set here now, to address.
The 107" does not require the spigot bores to be machined larger(not a problem to do whatsoever), but if looking forward to power delivery of what a larger engine can do, then a 117", or even a 124", will never leave you wondering if you did it wrong.
96ci to 113ci?
