Matt@TYGA wrote:If you're on a tight budget then you can make noticeable improvements on the 28 pipes.

We'll have to agree to differ on this one then, Matt. I concur, you can certainly improve the stock pipes, but I would say "you can make barely noticeable improvements".

If you want a totally stock [derestricted] look, then you are going to sacrifice power. Simple.

Inside the "belly" of stock MC28 pipes, there's a large section double-skinned, with a perforated inner core, that wrecks their effectiveness. [It's there in MC21 pipes too, but to a lesser degree.] I don't know the chamber dimensions of the MC28, but everything else on it is geared towards making it a great low power street bike. I'm not saying that in a detrimental way, I'm saying it in the way that Honda managed to make it a very [effectively] restricted 40hp 250 2-stroke that can be ridden very quickly amongst 60hp 250/400's and even larger capacity bikes in most "every day" riding scenarios.

At the end of the day, derestricting is really about releasing it's "true [as manufactured] potential". The MC21 was the last model you can do that with and keep it looking stock. The OEM '21 pipes will make well into the high 60's, and we've seen, if I recall correctly, 68hp out of Bill Limbs MC21SP on standard pipes*. You will be lucky to get over 55hp with standard MC28 pipes, so yes, it's a HUGE difference! The true potential in the MC28 stock motor [no porting] is 61~62hp, with race pipes.

*Standard MC21 chambers with Swarbrick carbon cans.
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Andy.
NSR-WORLD.COM

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