Cylinder swaps / Big bore kits - Honda Shadow Forums : Shadow Motorcycle Forum
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post #1 of 30 (permalink) Old 01-25-2009, 01:28 PM Thread Starter
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Cylinder swaps / Big bore kits

I have seen the 750 engine with swapped out cylinder heads and jugs to create a 1375, but can the 1100 use the 1300 jugs and heads or does any company out there make/sell a kit to increase the cc's of the 1100? I want a little more power, but do not want the $$$$ of a larger 1300-1800.

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post #2 of 30 (permalink) Old 01-25-2009, 02:12 PM
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Where did you see that? I would like to see it or at least read about it. On anything other than a Harley, it is usually cost prohibitive.

On the Harley 883 Sportster, the cylinders can be replaced with 1200 cylinders. It cost less to buy the cylinders than to bore them out. They usually machine the heads because that cost less than buying the 1200 heads.
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post #3 of 30 (permalink) Old 01-25-2009, 02:24 PM
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I, too, would be interested in the 'swapping out' on the 750, and in particular I would like to know what they were swapped out for to give 1375cc.

As an VT1100 owner I am not bothered, just intrigued.

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post #4 of 30 (permalink) Old 01-25-2009, 02:47 PM
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I would be interested in reading about the "swap". Please post it if you can find it again.
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post #5 of 30 (permalink) Old 01-25-2009, 03:21 PM Thread Starter
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I e-mailed him,
http://cgi.ebay.com/ebaymotors/Motor...1%7C240%3A1318 to get more info.

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post #6 of 30 (permalink) Old 01-25-2009, 08:11 PM
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definitely want to hear about this.
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post #7 of 30 (permalink) Old 01-25-2009, 08:16 PM
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Too good to be true. If such a thing actually existed you would already have heard about it and probably seen them, IMO...
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post #8 of 30 (permalink) Old 01-25-2009, 08:32 PM
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if you notice in the pics it looks to be stock 750 jug and head covers. I would think with what it says something would look different.
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post #9 of 30 (permalink) Old 01-25-2009, 10:17 PM
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Looks like it sold for 2,750. That would be extremely disappointing to have it sell for 2750 after the time and expense of changing it from 750cc to 1375cc especially with only 4,500 miles on the bike.

A better way to get more power out of the 750 Shadow is to use the available engine speed, just shift down and let it wind up. The 1983 Shadow 750 was faster in the quarter mile than the 1985 Shadow 1100. Bigger is not always faster.
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post #10 of 30 (permalink) Old 01-26-2009, 12:24 AM
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Personally, I think the seller if FOS.

Almost doubling the size of a 750? Sorry, ain't gonna happen.

The jugs from an 1100 are no where close to those of a 750.
The 600 to 750 conversion would be more believable,
but 750 to 1375? Yeah right.

Not to mention, even if it was possible, do you know how much
more stress that is on your existing lower end?
There's no way the the 750 clutch would handle a 1375cc engine.

Which rods did he use? I've never checked, but I'd be willing to bet
the rods are definitely not interchangeable, which means he'd then
have to put 1100 pistons on 750 rods, which again, I doubt will even fit.

I don't believe it for one minute.

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