 Big Bore Kit
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Joined: Oct 2010
Posts: 75
Member
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OP
Member
Joined: Oct 2010
Posts: 75 |
Hi all,
I was thinking about upgrading my 06 America (carb) and putting in a big bore kit. I spoke to my favourite (Queens english lads) mechanic and he told me that there was a real risk of blowing the bottom end with that sort of mod on my bike as it has done better than 50,000Km.
Does anyone have an opinion or advise on this mod on a bike of this age and Km?
Thanks in advance.
Softens your hands while you do the dishes - You're soaking in it!!!!
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Re: Big Bore Kit
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Joined: Jul 2007
Posts: 6,060 Likes: 6
Worn Saddle
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Worn Saddle
Joined: Jul 2007
Posts: 6,060 Likes: 6 |
I've always been told that the bottom end on these things were "bullit proof", as they were originally designed to handle a 1000 cc motor. But others on here would know better than I. Never heard of anyone EVER breaking one.
Fidelis et Fortis
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Re: Big Bore Kit
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Joined: Apr 2007
Posts: 3,061 Likes: 8
Loquacious
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Loquacious
Joined: Apr 2007
Posts: 3,061 Likes: 8 |
Never heard of anyone loosing the bottom end on these bikes. Many have the 904 and larger kits installed. With 4 main bearings and a substantial crank, these engines will handle the 904 with no problems.
12 Rocket Roadster
03 Bonneville America
69 BSA Firebird Scrambler
73 Yamaha TX 750
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Re: Big Bore Kit
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Joined: Jul 2011
Posts: 2,212
Oil Expert
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Oil Expert
Joined: Jul 2011
Posts: 2,212 |
i would not worry about it, so many have done so more, these are strong, no way a 904 is gona blow up on ya. But if ya go 904 you really should go 39m flat side carbs too to get all the bang for the bark.
2007 Speedmaster and miss it!
2013 T-Bird Storm and Luvin it!
Catching a yellow jacket in your shirt at 70 mph can double your vocabulary
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Re: Big Bore Kit
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Joined: Sep 2005
Posts: 3,816
Freelance Jedi Knight
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Freelance Jedi Knight
Joined: Sep 2005
Posts: 3,816 |
done my big bore when bike had over 60000 miles !!! at 84000 going strong your mechinc knows f-all
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Re: Big Bore Kit
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Joined: Feb 2007
Posts: 23,194 Likes: 56
Fe Butt
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Fe Butt
Joined: Feb 2007
Posts: 23,194 Likes: 56 |
Maybe his mechanic doesn't have the skills to do the BB and is trying to hide the fact by steering him away from it.
I learned all I need to know about life by killing smart people and eating their brains.
Eat right ,Exercise ,Stay fit, Die Anyway!
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Re: Big Bore Kit
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Joined: Feb 2012
Posts: 544
Adjunct
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Adjunct
Joined: Feb 2012
Posts: 544 |
you mechanic sounds like a Harley mechanic haha
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Re: Big Bore Kit
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Joined: May 2006
Posts: 2,647
Loquacious
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Loquacious
Joined: May 2006
Posts: 2,647 |
Never had a problem with mine.
06 America 904
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Re: Big Bore Kit
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Joined: Jan 2005
Posts: 2,531
Loquacious
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Loquacious
Joined: Jan 2005
Posts: 2,531 |
Quote:
Never had a problem with mine.
+1 
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Re: Big Bore Kit
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Joined: Jan 2005
Posts: 2,531
Loquacious
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Loquacious
Joined: Jan 2005
Posts: 2,531 |
Quote:
you mechanic sounds like a Harley mechanic haha
 + 2
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