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Sportster Motorcycle General Discussion and Problems For discussing problems about your Sportster motorcycle that don't fit anywhere else.

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  #1291  
Old 30th November 2020
gconnsr gconnsr is offline
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I live in the desert so it was gear the 883 or buy a bigger bike. Mostly open road. The thing is I like the new gearing even when I'm beating around town.
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  #1292  
Old 30th November 2020
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That's the only important thing, YOU like it!
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  #1293  
Old 1st December 2020
boomerguy boomerguy is offline
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Quote:
Originally Posted by Tomcatt View Post
Beats me. Want longevity? Install a 30mm carb so you've got a 30 or 40 hp engine.

Under the same conditions the hemi chamber will typically have higher engine temps while making less power. The hemi chamber will also be more susceptible to detonation. The difference is how well/efficiently the mixture in the chamber burns. A more efficient burn typically gives lower engine temps, lower cylinder head temps and lower exhaust gas temps.

A good comparison is the pre-Evo hemi chambered 1200 vs the bath tub chambered Evo 1200. The Evo's run better, cooler and are less prone to detonation.
That's what I wanted to know! Thanks. If I understand this correctly, the bathtub bath tub chamber gives more efficiency which results in longer engine life.
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  #1294  
Old 8th December 2020
exexpat93 exexpat93 is offline
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Not being a technical wonk knowing cylinder shapes, divots, gearing, etc. I find it amazing that a Hammer conversion kit of a 883 to a 1200 produces quite a bit more power than an OEM 1200. Engineering is amazing with the tricks they can do to squeeze every bit of HP/TQ out of an 883 conversion.
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  #1295  
Old 8th December 2020
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Highly-Dangerous Highly-Dangerous is offline
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Quote:
Originally Posted by exexpat93 View Post
Not being a technical wonk knowing cylinder shapes, divots, gearing, etc. I find it amazing that a Hammer conversion kit of a 883 to a 1200 produces quite a bit more power than an OEM 1200. Engineering is amazing with the tricks they can do to squeeze every bit of HP/TQ out of an 883 conversion.
Hammer Kits are, either, 1250 or 1275..... and very well done!!!

Have you had a look at their webpage? if you haven´t yet, do it!

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  #1296  
Old 8th December 2020
boomerguy boomerguy is offline
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Quote:
Originally Posted by Highly-Dangerous View Post
Hammer Kits are, either, 1250 or 1275..... and very well done!!!

Have you had a look at their webpage? if you haven´t yet, do it!

Even if you don't buy their kits, the videos are educational on stock engines and performance kits.
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  #1297  
Old 10th December 2020
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Quote:
Originally Posted by boomerguy View Post
Even if you don't buy their kits, the videos are educational on stock engines and performance kits.
Yup!
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