HEADS UP!!!

Site upgrade in progress... Core site functions are working, but some non-critical features/functions will be temporarily unavailable while we work to restore them over the next couple of weeks.

Please post any bugs you encounter, but before you do, check to see if it's already listed.

Thanks for your patience while we work to improve the community.

Sign in to follow this  
Followers 0
The Italian Stallion

Filter screen

7 posts in this topic

I was going to cut out my backfire screen on my bike the other day but I figured I'd ask some of use guys that have done it if it makes a damn bit of differance.

Share this post


Link to post
Share on other sites

According to the crew that worked over Doug Henry's '03 YZ450 SM ride, they tried a number of different air box configurations, including the two-stroke filter cage, and removing the screen had no measurable effect. Their conclusion was that the filter is more restrictive than the screen is, and my own tests have had the same results.

If you succumb to the folklore and try it anyway, I'd advise against cutting out the screen, as there is a risk of a loose piece of wire falling out of it. Better to just buy the cage from a YZ125/250.

Share this post


Link to post
Share on other sites

better us a backfire proof filter one of the y.o.t bike burned to the ground because they just used a two stroke cage an a normal filter.

Share this post


Link to post
Share on other sites

No there is no gain what so ever, maybe a tiny bit, but not enough to feel. I suggest keeping it on, cause a simple backfire can cause the filter to catch on fire, especially with the filter oil (flammable )

Share this post


Link to post
Share on other sites

on my 03 I use the twinair powerfilter cage (no wire) and fireproof element....it does breathe a little better - there is no worry of this filter catching fire -

Share this post


Link to post
Share on other sites

Use the TwinAir black filter and dump the screen. Probably will not notice a difference, but it's a little less weight and hassle.

Share this post


Link to post
Share on other sites
on my 03 I use the twinair powerfilter cage (no wire) and fireproof element....it does breathe a little better
Any improvement in breathing would have come from the filter itself. Twin Airs do flow a little better than some others, and I have seen dyno results that show nearly 1 full hp on a 450 going from a stock element to a Twin Air or White Bros. Either of these is still more restrictive than the flame screen.
... it's a little less weight and hassle.
That's funny. Hassle? :applause:

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!


Register a new account

Sign in

Already have an account? Sign in here.


Sign In Now
Sign in to follow this  
Followers 0