triple K&N here... Forgot others.
Necessary if you remove the plenum and intake plumbing. and the OE under seat air filter..

Crankcase breather needs filter or you fill the crankcase with crap!

The AT sensor for intake air temp and pressure needs protecting also as it controlls the AFR at various times..
 
natural275 said:
I have the triple k&n's; how necessary are these other two filters?
Click to expand...

My guess is you would not need the crankcase filter if you left the original filter under the seat and capped off the end that used to go up under the tank.
 
1olbull said:
WOW sam2100, you saved what by not going to our forum supporter, Flip?
Less than $10?
Congratulations indeed . . .
Best Regards,
1olbull
Click to expand...

hegels said:
I bought 3x RU-2780 and they've just arrived... however i've forgotten to get the other 2 (air intake temp and... breather(i think)

can somone please tell me the PN of the 2 that I need.

thanks,
Steve
Click to expand...

sams2100 said:
My guess is you would not need the crankcase filter if you left the original filter under the seat and capped off the end that used to go up under the tank.
Click to expand...
Not a good idea when I originally fitted my triples I was advised that I could do that but guess what stuff you leave in the old air box eg wet whether gear will get covered in oil mist ( messy) so I then extended the breather outlet inside the air box into a small catch tank that end in disaster when I got 5 km up the road as the vent in the catch tank was to small and caused the oil cap to dislodge and cover my left leg in oil.
So in answer Yes the breather filter is very nessasary
 
sams2100 said:
Was a bit worried I had pissed a few people off, so glad to hear you guys didn't take my mistake too seriously.
Click to expand...

lol, anyone bark at you like that, just tell em to **** off then give them a hug, its all good.
 
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