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Senior Member
what size main should i be lookin at for an HMF full system and a uni filter....HMF site says 200 BUT i was on their forums and appareantly 180 is more like it..but still that seems HUGE to me..from all the info ive read on this site.........anyone else have HMF full system ?
yellow 01 400ex
- elka tripple rate fronts
- razrs all around
- renthal bars ex bend
- 909 grips
- RTC Racing Clutch Lever & Perch
- HMF full system exhaust
- Uni airfilter
- parkingbrake block off
- DG fat series .190 swinger skid
- Powermadd hanguards
- SBS brake pads
SOLD AND MISSED!
Pit King
i have a 165 in mine, i need to do a plug read though. rode it in the dunes and didn't get a chance to check the plug afterward. 165 worked great though.
02 400EX
85 atc 70 w/Lifan 140cc never selling
85 atc 110 restored. *sold*
83 atc 200x restored *sold*
K&N filter
K&N jet kit
EHS Racing lid
Removed choke 42 pilot DJ146 main (still too big)
HMF full exhaust
AC skids
Holeshot XCR rears
14t front sprocket
IMS Roll front bumper
Graydon Proline nerfs
Renthal bars
UM air scoops
Run what you brung
200 and even 180 sounds high... i got a 160 now and its good. Depends on what you do for riding and such too...
02' Silver 440ex
Full P&P, Edelbrock Doug Eichner 440 carb, Motoworks SR4, Hotcams, Wiseco 11:1, Hotrods...
Registered User
i ususally start around a keihin 155 with a pipe and filter on a 400ex. the elevation and temperature will make a difference. it isn't uncommon that your jetting will change 3 or 4 mainjet sizes throughout the year due to temperature changes. i live at 625 feet above sea level too, which makes a difference. i found going larger than a keihin 160 pretty much hurt my power in the upper gears.
2005 450r
*sold* 2001 400ex
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