[rford426]

^^^^you did it??? iif so pm me i want it...i gotta 143se also

 

[BIZBKAK248]

raisen i was thinkin the same thing,in front of the bike will have air pushed into intake,on side it will have to suck-not sure how good it can suck when your leg is pressed against the filter though,like putting a rag over it, imo..

??

 

[pitbikepro]

ryan just cut your intake and have it welded..not a big deal..dont know why you want to though..justin berrys first pit had that done like 4 years ago..i think pps built that one.

 

[rford426]

hmmm

 

[Preston]

excuse me for being stupid, I didn't buy a stock bike, so I thought the filter was facing the rear tire. Anyways, it is still better to have the filter facing forward because it takes less away from the horse power because it doesn't have to suck in the air. Forward air filters are like a ram air induction, that is why you see a lot of DOHC 50 motors with the filter facing forward. FYI

 

[pitbikepro]

i really dont think it makes a differnce, i went back and used my factory air box with my k&n filter and it runs just as good.. i had to relocate my oil cooler to the right side though.. you ask why i did this? b/c i also run some 2 hour gp races on it and it helps keep out water and dirt..hell the bbr crf50 setup has the filter down the middle of the frame almost totally enclosed and works well also.. i think its just a bling bling thing.. if open filters where making so much hp differnce, then the big bikes would have a snorkle!! lol

 

[RuFfRyDaH]

that snorkle made me laugh hard..hahaha

 

[loveline]

hey. I only have the manafold now. I crushed the ti-pipe in a big crash the week before mini moto. I now run reg. set I believe its works just as good.

 

[loveline]

hey. I only have the manafold now. I crushed the ti-pipe in a big crash the week before mini moto. I now run reg. set up, I believe its works just as good.

 

[507 brett]

507 brett do you have a pic of your manifold.

nahh. my friend's had a lot of stuff to do/has been out of town for a wile/going to florida or something soon=no time to get measurements and make it so im still running the 4ward mani.

 

[MOdrz110]

all of the pros have the reverse manifold because they are running midsize pros.



its a 50 motor in a 110 frame

 

[507 brett]

acually alot of pros prefer 110 motors. derek costella went from a midsize pro to a 110...

 

[uno4cinco]

start cutting then find a good welder!

i heard if you drill a hole in both ends after you cut it then run a zip tie through them to "tie" it back together and slap some jb weld on the outside and some silicone on the inside then cover it all with duct tape it will be just as good as titanium carbon fiber

 

[dood]

I made a reverse mani and although it sat nicely on top of the engine cases ( no I didn't cut the cases ).

good news and bad news.

Good news is that the air filter stays cleaner alot longer although I had to make a heat shield to keep the filter from sucking in hot air.

Bad news is that it didn't make any more power. I tried all different lengths to see if it would change but the results where inconclusive.

The really bad news is the fact that it only worked on a Perimeter frame which not everyone in the world has, so the project was dropped. sorry.

 

[sweetjeep]

For a while I was pretty curious about the reverse intake too.



Don't waste your time with it.



It'll look cool and the filter will stay cleaner, but if anything, it will reduce power by disrupting air flow.



Do a search on this topic and you'll come up with a couple topics. In the most recent one, one of the guys who's name I can't think of(*Edit Cyclerider*), gives a brief example of what the intake tract should look like (since we can't have a perfect one due to the horizontal motor). Basically you want as few curves and corners as possible. Or at least large steady ones. If you reverse the intake, you both lengthen it, which will likely not benefit the power in the sense most people want, and add extra and opposite curves to the intake. It effectively makes the intake tract an screwed up S. Which is bad.



In theory, if you had the head ported to accept the carb in the 50 location, it could make for a really good intake tract. But that would be a lot of work and $$.



As for Preston's Ram-Air effect.. keep dreaming. To even THINK about a ram effect, you'd have to have it in nice clean airflow, and then be moving at about 60mph before it stood any chance of becoming effective.

 

[MOdrz110]

acually alot of pros prefer 110 motors. derek costella went from a midsize pro to a 110...

he rides both

 

[507 brett]

well i got a gpx 150 mani on the way. so we'll see how that werks out on a 110. prolly have to mod it a lil bit and ill have to get a new throttle cable (no biggy tho) when i get it on ill post pics

 

[507 brett]

got the gpx150 mani&carb from dougtrip, put the mani on and it looks like it needs to be about 1/2in taller and 1/2in to 1in longer and that'll put the carb right where i want it i think. might be a while longer b4 i get it done becuz my machine-guy/friend has been kinda slow lately. but it'll be sweet whenever its done!