Sportster Models 883, 883 Custom, 1200 Custom, 883L, 1200L, 1200S, 1200 Roadster, XR1200, and the Nightster.
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Old Aug 16, 2021 | 07:44 PM
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So is the price of the basic 1275 hammer kit for a 2012 1200 kit?

What does the basic 1275 kit include?

Will the exhaust need to be replace?

I went to the web site and it was all1250 info and when i called it was all about the 120+ kit.
 
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Old Aug 16, 2021 | 09:34 PM
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http://www.hammerperf.com/samplepdfs/07-13basic1275.pdf

This is the breakdown for a 2012. $1,698.85 not including the 15% off if bought before 8/23.
 
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Old Aug 16, 2021 | 10:42 PM
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That was from march and does not answer about the exhaust.
 
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Old Aug 17, 2021 | 06:29 AM
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No, your exhaust will fit. The 1250/1275 kit is just larger pistons, but the cylinders are exactly the same outside dimensions, so intake and exhaust ports will match original parts. Of course, you can always add a custom exhaust.

Depending on what year your bike is, you may need more or less to do the conversion. Technically, I did not have to upgrade my ignition, only adjust it. But, to get the best out of the kit, I purchased an aftermarket ignition module. I did not need a new clutch diaphragm like '04 and up bikes. So, my total 1250 upgrade cost just over $800 parts from Hammer. YMMV.

I think Hammer has a 15% off sale right now. I got 10% off my order for being a member of xlforum.net. I doubt you'll get both discounts, but it's worth a try.

John
 
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Old Aug 19, 2021 | 06:53 AM
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Anybody, including Hammer ever give any Dyno results? Looks like less than 5hp?????


http://hammerperf.com/xlbigborekits.shtml#1275features
 

Last edited by LoneWoolf; Aug 19, 2021 at 06:56 AM.
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Old Aug 19, 2021 | 07:50 AM
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It seems odd that the comparison in the dyno chart wasn't to compare what you get against the 883.
 
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Old Aug 19, 2021 | 08:47 AM
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Exactly, for the 2.3 horsepower gain from a 1250 to a 1275, I put the extra money into the ignition module, and went with the 1250 kit.

John
 
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Old Aug 19, 2021 | 08:49 AM
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Originally Posted by Andy from Sandy
It seems odd that the comparison in the dyno chart wasn't to compare what you get against the 883.
It looks like second dyno chart shows the 883 conversions, both iterations. Only get 2.3 more horsepower with the 1275 over the 1250.

John
 
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Old Aug 19, 2021 | 09:13 AM
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I didn't scroll down! doh!
 
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Old Aug 19, 2021 | 09:16 AM
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Umm.
Less that 5 torque, less than 3 hp increases, 1275 vs 1250.
Guess it depends on your budget.

Still if I was going to do this mode I would get the bigger.
IMO ignition, tuner, exhaust, intake are needed for both.

If the pipe is not changed, gains could be less, just guessing.
But as co-members above state, the OEM pipes will still bolt on.

Good luck with your project.
 
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