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Old 11-11-2008, 07:22 AM   #1
Bill & Jo Ann Blue OP
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350 cc big bore kit for KLX250, Ready to ship!!

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.

pilot screwed with this post 11-11-2008 at 08:38 AM
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Old 11-11-2008, 09:15 AM   #2
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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.
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Old 11-11-2008, 10:36 AM   #3
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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.

EDIT;

Here is Bill's website:

http://bandbcyclerestorations.com/

Bake screwed with this post 02-03-2009 at 07:23 AM
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Old 11-11-2008, 11:43 AM   #4
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Let's hear how it goes, and pics would be nice too

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Old 11-11-2008, 11:48 AM   #5
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Quote:
Originally Posted by Gadget Boy
Let's hear how it goes, and pics would be nice too

Will do. I host Bill's pictures whenever he needs them.
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Old 11-11-2008, 12:23 PM   #6
usedtobefast
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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.
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Old 11-13-2008, 06:52 PM   #7
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Quote:
Originally Posted by Gadget Boy
Bill is a stand up guy... I ordered his stainless steel braided brake cables and the pumper carb for the 09KLX250.
+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.
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Old 11-14-2008, 04:41 AM   #8
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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.
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Old 11-14-2008, 05:48 AM   #9
Bill & Jo Ann Blue OP
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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.

Bill & Jo Ann Blue screwed with this post 11-14-2008 at 05:56 AM
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Old 11-14-2008, 08:25 AM   #10
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Quote:
Originally Posted by usedtobefast
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?
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.
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Old 11-18-2008, 06:05 PM   #11
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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.




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




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




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











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









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


Bake screwed with this post 11-18-2008 at 06:12 PM
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Old 12-11-2008, 07:14 PM   #12
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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.
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Old 12-13-2008, 05:18 PM   #13
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I got my pumper carb and braided lines this week.. top quality and service!
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Old 12-20-2008, 06:16 PM   #14
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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.
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Old 01-01-2009, 07:31 PM   #15
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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

Bill & Jo Ann Blue screwed with this post 01-02-2009 at 07:21 PM
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