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Best exhaust?

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What's the best exhaust I can put on my drz400 and not affect the top end power? I heard mrd z pro but I don't want to repack it. So between Yoshi and fmf whose the best.

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Oh really and how often do you have to repack the mrd?

I'm doing a big bore stroker carb ported heads cam and just don't want to sacrifice anything

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I've done it once in 4000 miles just because.

Muffler packing on a 4 stroke is a pretty quick and easy job. Even on rivet exhausts it's not that bad. It's just one more tool and not as convenient as a bolt together unit.

If you're​ building a big bore stroker engine the Z Pro is necessary.

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If you plan on doing a stroker you may want to read up a bit more.  Yes the FCR is worlds better than the stock carb.  Repacking is easy and you have to do it with any exhaust on the market.  If you eventually do a stroker you will want the MRD. 

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yoshi is the best same as mrd pretty much sounds great and alot of power especially with jet kit and 3x3 i race AMA and we all have yoshi its the best i put it on in about 40 mins super easy

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