350 cc big bore kit for KLX250, Ready to ship!!

Discussion in 'Vendors' started by Bill & Jo Ann Blue, Nov 11, 2008.

  1. Bill & Jo Ann Blue

    Bill & Jo Ann Blue Adventurer

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    Hello all, Bill Blue here B&B Cycle Restoration…
    I am wondering how many of you would be interested in a 350 cc big bore kit for the KLX250 I am working on. I’ve already designed and ordered (4) a wet sleeve that will be made by Advanced Sleeve. The head gasket will be made out of copper, the base gasket will be the same as the one used on the 331 kit, the gaskets will be made by Cometic. The piston will have the same compression ratio as the 331 piston, 12.5:1; it will be made by JE, same that makes the the 331 piston. It will have the same static balance as the KLX 300 piston which will stop some of the buzz in the handlebars. I hope to have the (4) prototype kits in my shop in the next 4 weeks. I will put a couple months’ testing, as well as dyno testing on the kit before I will offer it for sale. At this time, I don’t know what the price will be. I will keep you posted on the progress of the kit. If any of you are interested in this kit, please contact me at
    B_jblue@sbcglobal.net


    Edit by pilot: Remove color coding by request of poster.
    #1
  2. GB

    GB . Administrator

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    Bill is a stand up guy... I ordered his stainless steel braided brake cables and the pumper carb for the 09KLX250.

    I'll be considering the big bore kit once my bike it out of warranty.
    #2
  3. Bake

    Bake adventurer

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    Bill will be testing the kit on 2 modified bikes. Those will be running his bored 34mm pumper Mikuni carb, and also aftermarket pipes.
    The third kit will be tested on a local bike using the stock carb and pipe. :augie

    EDIT;

    Here is Bill's website:

    http://bandbcyclerestorations.com/
    #3
  4. GB

    GB . Administrator

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    Let's hear how it goes, and pics would be nice too

    :lurk
    #4
  5. Bake

    Bake adventurer

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    Will do. I host Bill's pictures whenever he needs them.
    #5
  6. usedtobefast

    usedtobefast Adventurer

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    SF Bay Area
    So you are getting 350cc by just the bore alone? Or is there a stroke change too? If just the bore, are there any case mods?

    I think a top end 350cc kit that doesn't require a case mod would be very desirable.

    One of the reasons I haven't done an HT Racing 350cc KTM is the high cost of the mod ... which is driven by the complete end tear down and case mods ... which means you ship your engine to HT Racing and have them do the work. (And yes different audience, enduro racing vs. dual sporting)

    Being able to do this in your own garage is a huge plus.
    #6
  7. nobrakes

    nobrakes Long timer

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    +1, Bill's reputation is impeccable and has supported the KLX250S folks with some very nice and well thought out upgrades, picking up where Kawasaki fell short. The KLX community is lucky to have a guy like Bill making parts and kits.
    #7
  8. yorgo

    yorgo Adventurer

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    Does Bill have a website? I'm lookin but aint findin. Would be nice to see any comparo's, data sheets, and maybe order online.
    #8
  9. Bill & Jo Ann Blue

    Bill & Jo Ann Blue Adventurer

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    I don't have a website at this time, we are working on making one.

    I got a call yesterday that the 350 sleeves were shipped yesterday they should be in by Wednesday or Thursday.

    I have started rough boring the 4 cylinders for the 350 kit will leave .050 to be bored out when the sleeves arrive.
    #9
  10. Bake

    Bake adventurer

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    Bore change only. This was a goal from the start.
    Change out the cylinder and piston, and install with the new gaskets.
    Jetting changes will be tested, maybe baseline settings can be provided. Jetting and altitude are first cousins.
    No other modifications required.

    Except maybe stickier grips.:D
    #10
  11. Bake

    Bake adventurer

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    Here's some pictures of some of Bill's products. There is a simple webpage being developed now. At the present, please contact Bill directly.

    The 250 cylinder next to the 331 kit he sells. The 350 looks about the same in this size picture. The 350 sleeves are in, and the pistons will be in 2 weeks.

    [​IMG]


    The piston and the 331 cylinder. This kit is available now.
    Includes gaskets, rings, pin and pin keepers.

    [​IMG]


    The stainless brake lines. For stock height bikes or lowered, either one.

    [​IMG]


    The Mikuni Flat Slide Pumper carb, with adapters installed, and over bored 1mm. The airscrew is replaced with a T-handle screw.

    [​IMG]


    [​IMG]


    [​IMG]



    The bashplate. Aircraft grade Aluminum, heli-arc welded.

    [​IMG]



    [​IMG]



    The coverplate to block off the smog equipment. Off road use only, of course. :D

    [​IMG]
    #11
  12. Bill & Jo Ann Blue

    Bill & Jo Ann Blue Adventurer

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    I got (4) 350 pistons from JE this afternoon. Already have (3) cylinders bored will hone them to size tomorrow, will install two of them Monday one on Jo Ann's bike & one on mine. Going to Kansas City this week end to see the kids.
    #12
  13. GB

    GB . Administrator

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    I got my pumper carb and braided lines this week.. top quality and service! :thumb
    #13
  14. Bill & Jo Ann Blue

    Bill & Jo Ann Blue Adventurer

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    MERRY CHRISTMAS TO ALL

    Well I got the 351 kit installed & run two heat cycles on the engine. I installed a remote heat guage on the bike the pick up is located where the heat sencer was located. Rode the bike for the first time with the 351 kit the bike is smoothe didn't run it past 4500 RPM. It was about 30 Deg. when I took it for a ride so I didn't ride very long about 10 miles. The heat guage only went to 160 Deg. Plan to ride it if the weather warms up a little next week. Will give a report later on how it runs.
    #14
  15. Bill & Jo Ann Blue

    Bill & Jo Ann Blue Adventurer

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    Baker, Jo Ann & I took both of our bikes out today to see how the 351 kit works we put 110.5 miles on them today a total of 117.0 miles on the bikes we run them up to 6,000 RPM the bikes run great have good power. I will go to the dino shop tomorrow to see when he can run the bike to see kind of power the 351 kit makes.
    Later
    #15
  16. Bake

    Bake adventurer

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    Yeah, we went for a 110 mile ride...which started out as a 60 mile test ride, but then I got us plumb lost while in the boondocks of the Flint Hills, headed clear out the opposite way from where we wanted to be going, and I had to beg a farmer kid for gas for the 3 of us, and we about froze our behinds off, but yeah, we rode 110 miles on the new 351 kits.

    Big country out there. Perfect for a test ride.

    [​IMG]
    #16
  17. Chrisbarnes1

    Chrisbarnes1 Been here awhile

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    Seeing all the goodies being made available, and in particular the pumper carb, I thought I would share my difficulties with the dreaded CV carb.

    My son recently bought a mid 90s KLX---and the bottom line was that we could never get the carburation right--it got so bad that we suspected ECU, valves etc--but all these checked out ok. I also couldn't find anything really wrong with the CV carb apart from a bit of slide wear. In desperation I unbolted the slide carb off my new Honda CRF230 and tried it on the KLX. It fired straight up, ticked over smoothly and revved cleanly with no adjustments. Money is always tight so I settled for a pumper carb off a mid 80s Honda CB250RS (a single cylinder 4 valve motor of about the same power as the KLX). Good old e-bay got a carb for $40 in good condition. The big issue was the throttle quadrant being on the LHS making throttle cable runs difficult (solved by going to single cable and making our own abutment bracket). The Honda carb also has a cable choke--so now we have easy handlebar operation ( a cheap car cable assy did the job for $6). I had to heat the tank and create a slight depression in it to clear the top of the carb--but apart from that it was fairly straightforward. Starting is now a first kick afair, it idles reliably, accelerates VERY well and seems to require a slightly leaner needle position than the Honda for smooth part throttle operation--no jet changes so far. I'm still at a loss as to why the CV carb was so bad--and would really like the pumper carb on offer (with the the throttle quadrant in the right place!)---but nevertheless the old pumper carb from the Honda is working well--and responds to adjustments!

    Regards, CB:clap


    #17
  18. Bill & Jo Ann Blue

    Bill & Jo Ann Blue Adventurer

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    Haven't got a price on the kit yet hopefully tomorrow spent some time on the phone with the vendors today to finalize the prices of the sleeve, piston & gaskets.
    Something came up today didn't run the bike on the dyno will see when we can schedule another try.
    #18
  19. Bill & Jo Ann Blue

    Bill & Jo Ann Blue Adventurer

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    I now have a price for the 351 kit.
    $498.50 + $14.95 Insurance + $6.50 Shipping = $519.95 if shipped in the U.S.A.
    The price is subject to change depending on vendor increases beyond my control.
    Hopefully parts wil be ordered in a couple of weeks.
    #19
  20. mi_dualsporter

    mi_dualsporter oldboy

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    This is great news! Hopefully I'll have the cash by spring for the 351 kit!
    #20