Any Kawasaki F11 250 speed parts

Any Kawasaki F11 250 speed parts

This is a discussion on Any Kawasaki F11 250 speed parts within the Wanted forums, part of the Classifieds category; I'm looking for any aftermarket or factory optional speed parts for a '73-'75 Kaw F11 250cc enduro bike. I get the impression they used to ...

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  1. #1
    Senior Member whiskeysid's Avatar
    Join Date
    Mar 2008
    Champaign, IL, USA.

    Any Kawasaki F11 250 speed parts

    I'm looking for any aftermarket or factory optional speed parts for a '73-'75 Kaw F11 250cc enduro bike. I get the impression they used to be used in competition here and there, so there might be expansion pipes, ported cylinders, things like that out there.
    -the Rad Baron
    -\'72 CB350
    -\'72 Kawasaki H1
    -\'72 Yamaha R5/RD350 hybrid
    -\'77 XS650
    -\'47 Harley U flathead
    -a bunch of other old Jap bikes

  2. #2
    Junior Member Itsjustme1931's Avatar
    Join Date
    Feb 2018
    I have a bike for sale. Has a nice hooker exhaust on it. Call or text if interested 3 2 o 2 8 8 9 o 1 1. 72 kawasaki f11

  3. #3
    Senior Member XB33BSA's Avatar
    Join Date
    Aug 2012
    grants pass, OREGON, USA.
    the f11m was the mx bike a lot lighter better handling machine
    f11 based engine
    it was the first -piston port single that kawasaki heavy industries put into production at least that is what i remember reading in dirtbike magazine in 73 or so

    it did have fine trail manners was better handling and better power than an early dt1 but the dt1 by 73 had 3 years ealier in 70 adopted a reed valve and been refining that tune since 1970
    so it was already quite dated in its first year
    i am not aware of any kit speed parts
    bore and stroke is just a couple mm diff than a dt1 myn point being the dty1 had lots of info on hop-up kit partsv etc
    so if you put the f11 ex port timing close to a dt1 gyt kit barrel the pipe would work nicely
    dont forget the cumbustion chamber it has to be squish and volume optimizeed before you start toying with port timing pipes etc
    i have the dt1port timing plan in modded gyt formula and pipe dimensions as well
    if you are not savy to the terms or mods ,study up,make an effort to learn why and how it will be great fun for you
    a 2stroke single is by far the best type of engine modifying or hop up for a novice tuner/wrench/rider
    if you study first read books
    its easy making correct changes one or at most ma7be 2 steps at a time c an easily be done without the complexity of a 4 stroke
    every time you do a correct mod you will really feel it
    look for a webco head you may need to drop $400 on one but do it anyway
    eric gore has the squish deal down pat
    jemco for a chamber
    the f11m used a button magneto for quick revs
    dont do that leave a heavy flywheel 0n it
    a zip zappy motor with that 5 lbs less on the crank takes a pro to ride in anything but perfect loamy soil
    the rare very limited production f11m only was for a season maybe 2 then it was on for the kx moniker
    peter lampu and brad lackey were f11m pilotsName:  f11m.jpg
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    you may have heard of bad brad lackey
    the usa's first world mx gp champion and in the 500cc big boys class
    i can testify to his speed as i raced against him one time in a hare scrambles race
    it was chock full of very fast experts ,expert pro's mx and offroad,i was doing well in AMA disrtict 36 and the west coast rounds of the extensive long ama national championship enduro ,and almost lapped the entire field of 0-200cc expert A , final day, 15 minute mx moto grass track(laid into a voluptuous hillside virgin grassy glade ,slippy ? ya think?) special test at the trask mountain 2 day isdt qualifier in 87 on my highly sleeper modified by xb KDX200 86 at
    5'7'' 170 it was for me more than the perfect woods weapon it was like cheatting
    new sharp metzeler knobbies every event is a huge key to magic
    a 300 mile knobbie does not even stand a chinamans chance against a new one
    i am betting race slicks and dot race tires are similar
    ,i was very fit and as fast as anybody in brutal jersey shredding single track and steep steep climbs or drops,make a novice puke steep shit
    i got the holeshot on the entire 40 bike field
    if you have never holeshot am mx type start it is the most blissful happy time you can have on a motersickle
    the once cacophonous helter skelterness of the flag drop is replaced by almost silence,only the sound of the machine under you and it feels like floating on pure joy,man ,instantly you are the winner
    until of course 300 yards later,the exit of the first turn when bad brad wheelies past looking over at you,clutch hand mockingly waving,see ya ! and deftly kicking the shifter thru the gears throttle cable tight as a nun's panties,on a clapped out ,85 yz490 which soon almost rips you apart from the incredible shear volume of roost ,sharp clods and fragged shalerock
    lol lackey was i'guess he was the team leader in retirement of the red neck rooster mc club
    and from memory they all had a rubber chicken lashed to the top of their helmets
    or sdomething lol............ those fuckers new how to have a good time
    no booshit my buddy who pitted for me has it all on video tape
    Last edited by XB33BSA; 02-01-2018 at 11:27 PM.

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