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Posted by Troll
 - January 22, 2015, 09:21:02 AM

Changing the cams and upping the compression probably did more than just bumping the displacement a mere 50 cc (3 ci)....Lisa, on the Facebook Drifter page has done this, and after some teething problems, she seems to be happy with it. I did a big bore S&S conversion on my SuperGlide, 74" to 98", and the power level was pretty astounding, but the longevity of the top end was clearly an issue. going from a 3.96" stroke to 5" made things wear much faster, and the 3.635" bore required case mods.....but it might be easier to replace the stock cylinders/pistons on the Vulcan with 1600 mean streak parts, and then the cams with a high performance set....... The price of the kit parts doesn't really reflect how much you are going to spend....consider this alteration carefully. While it might be a blast to have a few extra ponies, the long term costs might make this a money pit. JMHO....

Posted by holycow
 - January 21, 2015, 21:11:55 PM

I came across this just now. http://www.thundermfg.com/store/index.php?l=product_detail&p=169
Kicks it up to 1550 CC! Anyone here tried it? was it worth it? Did it take away comfort or reliability? Any info would be great.
Thanks.
Jeff

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