Yamaha Discussions about Yamaha ATVs.

slip on

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Old 04-28-2009, 09:53 AM
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looking to put a FMF slip on on my 03 stock warrior,will i see a difference in power,or just louder ? can you guys please help me
 
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Old 04-29-2009, 07:13 AM
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First, I would highly reocmmend an HMF slip on. Most folks recommend the HMF for the warriors - so thats what I got - and now I recommend it too. The sound alone was worth the $.

As far as power - that will depend on any other mods you do, as they will start to work together netting an even bigger increase. However, if you just do a pipe and nothing else, you will probably only see a slight bump in the upper RPM range. Plus, you may have to rejet your carb (larger main jet) to compensate due to the increased air flow resulting from you free'er flowing exhaust. After you put the pipe on..if your quad trys to 'cut out' in the higher rpms - that is the tell tale sign. Its leaning out in the higher rpms b/c your main jet is now too small.
 
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Old 04-29-2009, 07:20 AM
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iam getting a good deal on this FMF 250.00 Canadain,only used for 1 ride,said it was to loud.i thought if you just add a slip on i would not have to re-jet,if i do ,what size ?????? iam running a K&N filter as well














Originally Posted by Mud Junkie
First, I would highly reocmmend an HMF slip on. Most folks recommend the HMF for the warriors - so thats what I got - and now I recommend it too. The sound alone was worth the $.

As far as power - that will depend on any other mods you do, as they will start to work together netting an even bigger increase. However, if you just do a pipe and nothing else, you will probably only see a slight bump in the upper RPM range. Plus, you may have to rejet your carb (larger main jet) to compensate due to the increased air flow resulting from you free'er flowing exhuast. After you put the pipe on..if your quad trys to 'cut out' in the higher rpms - that is the tell tale sign. Its leaning out in the higher rpms b/c your main jet is now too small.
 
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Old 04-29-2009, 08:43 AM
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I put a FMF on mine ,it's quieter than the stock/no baffle,not much but sounds much better.I noticed a differance but had also did the airbox mod and changed sprockets at the same time.Just the weight loss,sound and looks would be worth it.
 
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Old 04-29-2009, 09:28 AM
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what is the air box mod?what size sprockets are you running?







Originally Posted by Baddawg
I put a FMF on mine ,it's quieter than the stock/no baffle,not much but sounds much better.I noticed a differance but had also did the airbox mod and changed sprockets at the same time.Just the weight loss,sound and looks would be worth it.
 
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Old 04-29-2009, 10:53 AM
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I have the K&N kit too and I had to go up 1 size to a 147.5. Stock is a 145. After a 147.5 is a 150 - which is most likely going to be too big. Most folks don't need a 150 until you have some more 'heavy' modding other than a pipe & a K&N.
 
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Old 04-29-2009, 12:55 PM
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you can buy the hmf for 225 with free shipping on ebay and i my opionoion they sound better.
 
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Old 04-29-2009, 03:18 PM
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i second the HMF big bang for the buck and i got mine cheaper then 250 with spark arrestor and all, you will most likely have to step the main up to 147.5 with just a slip-on, HMF sends a 152.5 jet with the pipe depending on where you buy it from and 152.5 is way to rich lol, i think i use a 150 right now the 152.5 doesnt run bad either but its just barely to rich for mine.
 
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Old 04-29-2009, 04:26 PM
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just called the bike shop to get a price on a 147.5 main jet ,,18.00 plus taxes,just for one jet ,does anybody have a extra 147.5 they could sell me?????








Originally Posted by 91Warrior357
i second the HMF big bang for the buck and i got mine cheaper then 250 with spark arrestor and all, you will most likely have to step the main up to 147.5 with just a slip-on, HMF sends a 152.5 jet with the pipe depending on where you buy it from and 152.5 is way to rich lol, i think i use a 150 right now the 152.5 doesnt run bad either but its just barely to rich for mine.
 
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