Raptor 660 carburetor + stock paper air filter in XT600
 

Someone use Raptor 660 carburetor in XT600 with stock paper air filter? (Hiflo Filtro HFA 4608)

There shouldn't be any issue with that, why would you think there might be?

FWIW - I ALWAYS switch to a foam filter, Uni or TwinAir. Paper filters get expensive over the years, and foam filters can be cleaned again and again. My 1986 R80G/S we rode around the world has the "original" foam filter I installed from new, and it's still good.

I'm afraid I can't get enough air in the bigger carburetor

How much bigger is it? A couple of mm, no big deal.

stock is dual 28 mm, and the raptor carburetor is dual 33 mm

https://www.youtube.com/watch?v=yyUUOkM_TSQ&t=345s

check a video with those carbs on an a xt 600

good luck with engine life running without air filters..... amazing dude :)

from my experience, CV carbs work much better with an airbox, see how it wants to die at 1:57?...typical of CV without airbox.

if he had crappy carbs before, no wonder that he thinks its heaven now...

nicko, dont believe everything you see in you tube :)

hhahahahahha you're right my friend. by the way i'm not having an air filter for 5 years but the motorcycle is always stored in an garage and not outside when it rains. pulled out my cylinder when i installed an wiseco 98mm and it was as good as new. not a single scratch on it. but when i drive it to somewhere dusty i always put a plastic bag on the carb to proven dust and crap on getting in while it's parked on the beach for example

how many kilometers in these 5 years?
the problem is when you ride, not when you are parked, especially in crete where it is dry, you have a lot of dust in the air and the engine simply sucks it up.

the first place to check wear is the piston rings GAP.... not the cylinder wall :)
also, the dust in the air is very fine, will not make scratches in the wall, but it slowly acts as good fine sanding paper, no wonder your cylinder "looks like new" :)

I dont believe that what i am saying will make you change your mind and run an airbox and filter, but so just that you know there is no free lunch, airboxes and air filters exists for a reason.... ;)

my problem with the single carb , that i don't have enough space to fit a 90 degree hose or something like that, that will allow me to put a pod filter . it's 2 cm away on the top .

find someone who is good with 3D CAD software to design for you a manifold that connects the two exits from the airbox to the single entry into the carb and then send file to 3D printing with nylon material.


I produced quite a lot of intake part this way for my latest racer project.


actually i built a complete airbox with 3D print parts, and also the internal bell mouths, all the grey parts you see are 3D print

Nicely done! :clap:

please share more pics.

i'm a mechanical design engineer proficient in Solidworks so... yeah i'm gonna try what you said.. and if anyone wants a free 3d design for their xt just hit me up

I am an industrial designer and work with CREO, but SW is just as good to do it.


I needed to build a complete airbox that didnt exist, for you its more like to find a way to connect carb to the original airbox, hope you still have it, if not, get one...


in any case, best tip is to first build a carton or foam mockup piece that is easy to make and correct. once you have the basic dimensions, you can build in CAD and send to print. in italy i use weerg.com

i did all my thesis on Creo 2 . i've designed about 13 mold cavities and did the cam part too ! wow i'm impressed ! seriously i'm very happy to talk to a fellow design engineer ! in sw i do mostly cad and stractual analysis and aerodynamics but creo is much better on cam.