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Senior Member
What can I do to gain more power by air intake?
K&N Air Filter, if so which part number?
Different Air Box, if so who? Will this change my K&N Air Filter part number?
How much horse power will I get? Is there a noticable difference?
Does the orginal carb on my 88 250r need to rejeted? I am going to go with an exhaust upgrade too. (full system)
Senior Member
K&N with holes drilled in airbox and not sure how many hp's but you will need to rejetOriginally posted by strnge
What can I do to gain more power by air intake?
K&N Air Filter, if so which part number?
Different Air Box, if so who? Will this change my K&N Air Filter part number?
How much horse power will I get? Is there a noticable difference?
Does the orginal carb on my 88 250r need to rejeted? I am going to go with an exhaust upgrade too. (full system)
2006 honda rancher - for sale or trade
You can't buy skills...
i beleive it is HA4250...
take the airbox lid off...
06 YFZ450
1988 TRX 250R
2001 XR 50
1984 Honda 200S
1776 Turbo Sandrail
Registered User
keep in mind a k&n filter lets fine dirt in, if you use one, put on a pre-filter.
85/86 atc 250r, very modded, lrd 310pv, +1 lsr, shortrack kit, cr250r igntion, 39 pwk, paul turner hi-rev pipe, propeg nerf bars, HREATV custom frame,
86 atc200x- 84 250r exteneded axle, supertrapp pipe, 27mm carb, works rear shock, 84 250r front end(rebuilt w/ terry kit), 350x tripples, ported head, 12:1 piston, webcam,
crf450r quad, lsr frame, swinger, antifade, hyper beadlocks and the best of everything else.
88 trx 250r pced and reinforced frame, +3+0 t-pin, 310pv, cr ignition, 39 pwk, lsr rear end, elka shocks, aftermarket radiator, lrd pipe
06 ktm450exc, full skid plate/guards, radiator fan, clarke tank, dual sport kit, reg/ins/insp, steering stabilzer
98 200exc: street plated, skid/guards, dual sport lights, stabilizer and more.
07 ktm 250xc, skids, reg/ins, dampener, good lights
2011 atc450r in the works, suspension and details need to be worked out
Senior Member
Is the pre filer a cloth bag over the k&n actual filter?
You can't buy skills...
yes... i dont know about cloth, but yes it is "cloth" that goes over the filter itself...
06 YFZ450
1988 TRX 250R
2001 XR 50
1984 Honda 200S
1776 Turbo Sandrail
Its Passion that Kills
Run no airbox and a filter with an Outerwears (thats the pre filter filter cover)
Guys at the track run no airbox, but if your runnin in sand a lot just take off the airbox.
And if you let major air in like take off the box then rejet with that and the pipe then. Prolly just go up lik 2-5 like a 162 I think?
Scott Landgraf
1989 Honda 250r
-Mild port-FMF Header Pipe-FMF Silencer-CR250 Head Gasket-Coolhead-Rad Valve-K&N Filter-DuraBlue Axle-Works Shocks-Lonestar Steering Stem-Renthal Bars
Thank you Wes and Andy
SOLD! Gone but not forgotten.
2002 300ex (yellow) with
PRM bottom frame skid plate
My Drifter
1985 5.0 Mustang GT
-5-speed
Its Passion that Kills
Run no airbox and a filter with an Outerwears (thats the pre filter filter cover)
Guys at the track run no airbox, but if your runnin in sand a lot just take off the airbox.
And if you let major air in like take off the box then rejet with that and the pipe then. Prolly just go up lik 2-5 like a 160 I think?
Scott Landgraf
1989 Honda 250r
-Mild port-FMF Header Pipe-FMF Silencer-CR250 Head Gasket-Coolhead-Rad Valve-K&N Filter-DuraBlue Axle-Works Shocks-Lonestar Steering Stem-Renthal Bars
Thank you Wes and Andy
SOLD! Gone but not forgotten.
2002 300ex (yellow) with
PRM bottom frame skid plate
My Drifter
1985 5.0 Mustang GT
-5-speed
Senior Member
The only thing this quad will NOT be used on, is a flat track. If that helps any.
Senior Member
Personally i would not run a K & N filter. As Deathman says, it lets fine dirt in. I would suggest a Uni filter, it has two layers of foam and does a better job of filtering. I say this being that i ran a K & N filter for 5 years and wont put it back on now. I also run an enclosed air box and if you take the time to jet it properly, it will run great. Granted i run HareScrambles so i need a enclosed airbox due to deepwater and tons of mud. I even switched from K&N to Uni Filters on my 4-strokes. Since i switched i have noticed a longer time between top-end rebulids and less sand/dirt in my carb. (yes one time i took my carb off and found crap in the bowl and jets)
Jeff Moss: OXC #210
06 450r HRC kit, Yoshimura RS-7,Prm Skids, Derisi .5 MGC a-arms, Fox Float Evol, Rekluse, Razr 2 f&r, Douglas Shamrock beadlocks, AC nerfs
Jim Moss: OXC#442
2007 450r: Hrc kit, ars-fx arms w/ axis, pro-armor nerfs, axis rear w/dirtworks xc link, hmf slip-on,MBR sprocket guard
2003 400ex: 426cc, 450r carb, Ohlin rear, revalve 450r front shocks, HMF
exhaust..
John Moss: OXC#300 2007 450er, teixeira tech +1 LT w/Fox evols,fox rear w/dirtworks xc link, shamrocks all around, Kicker conversion, Rekluse, cylinder works 480cc, Hrc Kit, Lonestar axle, Pro-armor nerfs, houser +2 stem, full hmf pipe
(retired, but still running)88 250r custom axis LT, Laeger +3 LT arms, Houser +1+1 stem, RPM swinger, ESR 310, ESR trx-6 pipe, rad valve, Uni filter,38 A/S, TCS xc rear shock, PRM Summit Bumper, Kenda speedracer front + rear, Ims 4gal tank
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