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

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

  1. GB

    GB . Administrator Super Moderator Super Supporter

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    My guess is yes, because people were using the piston and cylinder from the KLX300 in the KLX250 to bump up the displacement. Keep in mind the KLX300 is a kickstart, no e-start.

    In a previous post, Bake said this:
    #61
  2. Bake

    Bake adventurer

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    ooops
    #62
  3. GB

    GB . Administrator Super Moderator Super Supporter

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    :ear

    :deal

    :lurk
    #63
  4. Bake

    Bake adventurer

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    Tank #2 welded up. Time to start making mounts.
    One more clue: 1.1 gal.
    #64
  5. GB

    GB . Administrator Super Moderator Super Supporter

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    :huh

    PICS!!!

    :ddog

    :D
    #65
  6. Bake

    Bake adventurer

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    It's Bill's gig, and the B and B policy is, nothing is shown for sale until it is tested by us, and ready to ship. He's ok with hints, though. :lol3

    Hint #3
    It does NOT mount to the luggage rack.
    #66
  7. rickypanecatyl

    rickypanecatyl SE Asia adventure tours

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    Bake - could I get a confirmation on whether or not the 351 cc kit would fit on a '99 KLX300? Thanks
    #67
  8. GB

    GB . Administrator Super Moderator Super Supporter

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    How about you show us some spy pics!! We surely understand that if testing proves it's a dud, you at least get kudos for trying. Alright, we'll be patient.. :lurk
    #68
  9. Bake

    Bake adventurer

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    Bill's 6'2", and I ain't by a long shot. :lol3
    Ok, maybe.

    A quick mention again about baseline jetting on the KLX351 kit. IF you're using the STOCK CARB AND PIPE, you still must re-jet!
    DON"T run stock jetting! This engine loves fuel.

    Here's where my bike is at, 1100 feet ASL. If you live in Leadville, at 10,000 ft. ASL, maybe stock jetting will work...
    I use the KDX200 airbox snorkle, free carb mods, and the pipe mod.

    Baseline:

    #40 Pilot
    Dyno Jet needle for the stock carb, full lean (bottom notch)
    #132.5 Main Jet
    Airscrew 1 turn

    I do think the full lean on the needle indicates there's something else that should be better, but I've tried a dozen combinations, keeping a log of the changes, and this is the set-up my bike likes the most. Especially the pilot and main. Anything else, and it just doesn't run close to right.

    If it starts ok on the enrichening knob, but with one blip can go off it at 10 seconds and idle good, the pilot is correct. You're way lean if it needs one minute warm-up or more before it will idle. Ride it, if it bogs, it's rich. If it surges at steady midrange and up, it's lean on the main.
    Ride it, and then check your plug after a 6000 rpm pass and a throttle chop. Get stopped and turn it off as quick as you can. The plug you want is tan, not white. Dark plug means you're rich. Black shiny plug means you are way rich.

    Good luck!
    #69
  10. Bake

    Bake adventurer

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    I cannot answer that as a yes or no, I'm sorry. It is marketed for the '06, '07, and '09 carburetor version of the KLX250S.
    #70
  11. Bake

    Bake adventurer

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    Spy Photos, Pat.Pend.

    We are developing this auxiliary fuel tank for the KLX250/351. As you can see, it is not yet completed
    but we see no major issues. A few weeks at most before we can test ride with 3 of them.
    I anticipate more in this line of products. Many things are in development.
    All intellectual property is reserved.

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    #71
  12. GB

    GB . Administrator Super Moderator Super Supporter

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    :tb so this will replace the battery cover? How much does it hold? Let's see it mounted and tested.. what's the hold up? It's spring, ain't it? :ricky :lol3
    :lurk
    #72
  13. Bake

    Bake adventurer

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    The first tank is mounted and is being ridden. Pics to follow.
    Tanks 1 and 2 will be tested on the trails of Colorado the Memorial Day weekend.
    Tank 2 and 3 will be tested in Colorado the week of June the 7th.

    The tank capacity is 1.1 gallon. This gives 1/3 more range. The stock tank and our tank will be 3 gallons total.
    The battery and battery retainer remain stock.


    We are very impressed at how strong the mounting system is. The fit is very nice. Provided our test trips go well, this tank can be a production item.

    edit: Tank #1 held 1.13 gallons.
    #73
  14. Big Single

    Big Single Tejas

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    I'm always looking for a lighter dual sport. With the 350 kit, what sort of highway cruising speed can you maintain without damage to the motor? Is the general rule 2/3 of max rpms?
    #74
  15. Bake

    Bake adventurer

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    I cruise at the torque peak, generally, which on this 351 engine is 6000-7000, so that's about right. The "redline" is 10,000. This big bore engine makes all the power it's going to make at a much lower RPM, at about 8000, you're just making more revolutions. However, it makes close to maximum torque as low as 3500, so it is more of a "tractor" motor than a peak RPM motor. I'm going to gear up a tooth to 15 at the countershaft, because the 351 will pull it at highway speeds. The 250 is just weak, and can't really use the tall 6th gear, in my opinion.
    #75
  16. Big Single

    Big Single Tejas

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    Do you remember the mph at 6000-7000 rpm?
    #76
  17. punkenduro

    punkenduro now in a cage...

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    with a 120 606 on the back, its almost an even drive (6000rpm = 60mph, ect.) im subscribing to this thread, i would love to do the 351 and tank right now but im having some shifting issues to figure out first.
    #77
  18. Bake

    Bake adventurer

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    Tank #1, the very first prototype.

    It measured 1.13 gal.

    It is a gravity feed tank. It has it's own petcock with NO reserve, so we will run this tank first, then switch to the main tank. It will allow the KLX250 a full 3 gallons of fuel. The coolant catch bottle is replaced with another, slightly smaller bottle, we are making up a mount for it now. The battery isn't affected.
    The material is 5052 T3 aluminum. This tank is bolted to the bike in 4 places, the plan is to do it with 3.

    The welding is much better on the next 2 tanks, the tank shown previously is #2.

    Please bear in mind, these first 3 tanks are for our use, and throughout the month of June, we will be testing them in Colorado for hundreds of miles of trail-riding. After that is accomplished, a decision about this will be made.






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    #78
  19. Bake

    Bake adventurer

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    The stock speedometer is wildly out of calibration, so it's worthless for a MPH check. I don't use a GPS, so I really can only guess that with stock gearing, 7k rpm would be approx. 70 mph.
    One of my priorities is to switch to the 15T countershaft sprocket for testing with the 351 engine.
    #79
  20. GB

    GB . Administrator Super Moderator Super Supporter

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    Bake, thanks for the pics and update..

    What's the stock gearing on the bike and what will the 15T achieve?
    #80