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Drew22

Best slip on for 09 yz450f?

25 posts in this topic

Ok hears the deal. I dont feel like spending a bunch of money for a complete exhaust system so i am looking for a slip on under $350. I want it to give me more power and to have a good sound since the exhaust on the 09 yz sounds a little sissy. How is the two bros m-7 slip on. Or does fmf make a good slip on. which brands will give me the most power and a loud sound. Also do I have to rejet my carb with a slip on or can i get away without jetting? thanks

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I just bought a LeoVince off Ebay for $125. $150 shipped LeoVince has a huge reputation in Europe. The slipon came loaded with goodies, spark arrestor, quiet insert and wash plug. Here is a link to the store-http://cgi.ebay.com/ebaymotors/LeoVince-Exhaust-Yamaha-07-09-YZ-450-F-Leo-Vince_W0QQcmdZViewItemQQhashZitem3a5524ca8eQQitemZ250536577678QQptZMotorcyclesQ5fPartsQ5fAccessories

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Always had trouble with the two bro staying together, I know Pro-Circuit and FMF make slip-ons that are good. I have tried the Leo-Vince full system and it made great power but seemed really loud, the two bro is loud also.

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Always had trouble with the two bro staying together, I know Pro-Circuit and FMF make slip-ons that are good. I have tried the Leo-Vince full system and it made great power but seemed really loud, the two bro is loud also.

which models by fmf and pro-circuit would give me the most power gains and a nice loud sound.

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I think the 08 and 09 run the same exhaust. I bought a slip on (FMF Q4) and did not notice much difference between it and stock. A week later I put the FMF Powerbomb header on and that made a huge difference. Maybe with the price break that FMF is offereing right now, you could come in for around $350 for a full system.

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Of what FMF offers, the factory 4.1 performs the best. For Pro Circuit the T-4 or Ti-4 slip-ons would be the best performing. These two perform the same, but the Ti-4 is made out of titanium and the T-4 is stainless so it is cheaper.

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My buddy has been happy with his GYTR but its hard to gain much power over stock

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My buddy has been happy with his GYTR but its hard to gain much power over stock
On an '08-'09 it shouldn't be. Not in the mid range, at least. Almost anything is an improvement.

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On an '08-'09 it shouldn't be. Not in the mid range, at least. Almost anything is an improvement.

Really? I didn't think they were that stuffed up, my buddies is '09 and he said its much better. Only other newer bikes that ride with us are Hondas so........

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Yeah, after I warmed up my old 09, 4 hours, run it down it down the street at consistent speed, it would surge. This never happened with my Dr.D

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I have a Two Brothers M7 slip on exhaust on my 08 and it has a major difference on performance. Although they are all complaining about the loudness of this exhaust we must consider that this is a RACING exhaust. If it is going to be used for trail riding there is a quiet insert that reduces the sound but also the performance. So the choice is always yours.

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^^^motocross tracks are getting closed down for loud exhaust systems. You won't have any MX tracks to worry about it being loud and "cool" sounding if the get shut down.

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^^^motocross tracks are getting closed down for loud exhaust systems. You won't have any MX tracks to worry about it being loud and "cool" sounding if the get shut down.

I agree with you, i'm not a fan of loud exhausts either and i use a quiet insert whenever i have to. I'm living in Europe and here you can race with an uncorked exhaust only if the MX track is far from populated areas.

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I agree with you, i'm not a fan of loud exhausts either and i use a quiet insert whenever i have to. I'm living in Europe and here you can race with an uncorked exhaust only if the MX track is far from populated areas.

Cool I am just not about promoting "toolbox" or "dunegoon" loud exhaust systems:thumbsup:

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I tried my friends Stock '07 pipe and realy liked what it did for the mid range of my '09. I needed a S/A pipe so I went with a FMF Power Core 4. Good price and great power over stock.

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YOSHIMURA RS2 - There are a few flat track guys and a slew of MX guys who use this slip on and make some very good power. Quality Yoshimura stuff with a removeable S/A and $300 shipped. That's a very nice pipe

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Go with Dr. D. It was mad for this bike

Agreed! I bought my bike a Ti/Ti dr.d for christmas and its an awesome pipe cant say anything about the power yet because theres snow here, but the fit and finish is AMAZING!!!

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