Any idea why a remap is needed? Lower restriction changes manifold air pressure (MAP) values maybe?
Any idea why a remap is needed? Lower restriction changes manifold air pressure (MAP) values maybe?
After some research, I just bought one of these.MWR is well known in racing circles, but not so much with street riders, as they are not marketed heavily and they are more expensive. My experience with MWR is on my Ducati Monster, which ran a little, but noticeably, more smoothly after switching from K&N to MWR.
They now have two air filter models for the little Yamaha.
One is a 'Race Use' only filter, and requires ECU reflash or fuel management controller:
http://mwrairfilters.us/prodDetail.asp?ID=4115
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Hmmm. Isn't the purpose of that flame guard to keep a backfire flame from getting to the fuel system components which are right by the air filter box? Not sure I like this idea of removing it . . .I tested MWR race filter vs stock and a modified stock filter. The results show the the modified stock filter is very close to the MWR race. I also tested no filter at all which proved to make the best power.
No filter isn't really a good option for long term reliability
MWR race 2nd best power but don't run it at track with fine dust and sand around. While the filter makes .3 HP from 10k to 12,8k you will reduce engine life by a fair amount
Modified stock filter is very close to the MWR race and provides excellent air filtering. To modify the stick filter simply remove the flame guard from the underside by drilling the plastic rivet heads holding it in place and reinstall the filter
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If you ever had a backfire big enough to shoot flame back through the intake on anything fuel injected you've got bigger problems then worrying about melting your air filter.Hmmm. Isn't the purpose of that flame guard to keep a backfire flame from getting to the fuel system components which are right by the air filter box? Not sure I like this idea of removing it . . .
Jim G
You are correct. I wouldn't do it with a street bike. On a race bike, yesHmmm. Isn't the purpose of that flame guard to keep a backfire flame from getting to the fuel system components which are right by the air filter box? Not sure I like this idea of removing it . . .
Jim G
20 yrs ago when we had carbys, yes.Hmmm. Isn't the purpose of that flame guard to keep a backfire flame from getting to the fuel system components which are right by the air filter box? Not sure I like this idea of removing it . . .
Jim G
Auffit, the R3 is NOT 20 years old. It is a new design that only came out in 2015. Yamaha does not add stuff to a bike unnecessarily, especially one in a price-sensitive entry level market, because it costs money to do so. They had a REASON to provide that flame guard. We just don't know what that reason was.20 yrs ago when we had carbys, yes.
Ive got the BMC but this also looks high flow.
Might fall under the heading "designed by lawyers". There's a lot of that these days.They had a REASON to provide that flame guard.
Jim G
Auffit, the R3 is NOT 20 years old. It is a new design that only came out in 2015. Yamaha does not add stuff to a bike unnecessarily, especially one in a price-sensitive entry level market, because it costs money to do so. They had a REASON to provide that flame guard. We just don't know what that reason was.
Jim G
Aufitt, r100 has got it. The only reason it is likely there is because it was required by DOT law. If it wasn't written in law it wouldn't be there. The US is usually the largest market for products so they are built to the US regulations.Might fall under the heading "designed by lawyers". There's a lot of that these days.
As a design engineer who has worked under many senior engineers who've been at it for 20+ years, I'd like to add:Might fall under the heading "designed by lawyers". There's a lot of that these days.
Auffit, the R3 is NOT 20 years old. It is a new design that only came out in 2015. Yamaha does not add stuff to a bike unnecessarily, especially one in a price-sensitive entry level market, because it costs money to do so. They had a REASON to provide that flame guard. We just don't know what that reason was.
Jim G
Jim,Might fall under the heading "designed by lawyers". There's a lot of that these days.