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Discussion in 'Vendors' started by Bill & Jo Ann Blue, Nov 11, 2008.
<HR style="COLOR: #ffffff; BACKGROUND-COLOR: #ffffff" SIZE=1 itxtvisited="1"><!-- / icon and title --><!-- message -->Well, I finally got to put my bike with the 351 kit on the dyno this afternoon.
Baker will post a copy of the dyno chart after this post.
The maximum horsepower came to 26.55 at 7,100 RPM; maximum torque came to 21.11 at 5,800 RPM. This was with the following equipment in place:
Stock KLX 250 header, Super Trapp slip-on muffler w/5 discs, Mikuni pumper flat slide TM33/34 carb. Kenda K270 5.10-18 rear tire. Stock gearing & 6th gear run.
Pilot jet 40, main jet 140, air box lid on, KDX 200 snorkle, air box backfire screen removed, crankcase vent modified.
Stock valves, ports cleaned, 351 c.c. piston 12.5:1 compression on regular pump gas, no detonation or ping.
As a note, I changed the stock header to a Power Bomb header for another run on the dyno, but actually lost 1/10th horsepower.
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GREAT news about the 351 kit!
Any overheating issues with this setup?
Do you know when you might have the first kit ready for retail?
I'm also looking to buy the carb and the 351cc kit when avaioable.
let me know when you have them ready!
Bill helped me install my 350 kit today. My bike is #3, last of the development engines.
It really is a pretty easy job to do. You don't have to remove the radiators to do it. It took us about 2 1/2 hours without rushing.
PM Bill for the kits, they will be available in a few weeks.
She started right up. I'll be putting it through the first heat cycles this weekend.
I've moved this post from the big KLX250S thread in Thumpers, so Bill can spot it. You may also wish to contact him directly.
I have my 350 kit installed, and so far I've ridden 85 miles on it, breaking it in gradually. I am using the stock carb and the stock pipe. The generally agreed upon easy mods, the Dynojet needle, a different pilot and a different main jet. No screen and the KDX snorkle.
Off road, where I'm using 4K-6K rpm, it's a beast. No, it's not a Husky 650, but compared to the stock engine, it's a different motorcycle entirely.
My engine is a test bed for several configurations, in the interest of helping people.
I'm surprised the HP peaked at only 7,100 rpm. Where does the stock 250 peak by comparison?
Is anyone surprised that the larger header actually lost HP?
Be kind. It's my first try at setting up a website.
Interested to get your long term impressions once you've had a few miles on the 350cc kit
All of the parts have arrived for the 351 kit for the KLX250 kits will be ready to ship Thursday 2-19-09.
What are the details on the kit, how are you getting 351cc, how much?
All info and pics here:
Bill, if you'd like me to merge both threads together and change the title to ready to ship, let me know.
Please visit Bill's website for information concerning the different big bore kits, brake lines, skidplate and the TM34 carb.
Merged together... Once my warranty on the KLX runs out.. I'm going to have to resist this temptation!
I am in development of an aluminum fuel tank that will be a bolt on kit and will supplement the stock 1.9 gal. tank. So far, I am working on the mock-up. It will be awhile before I get an actual prototype fabricated. My goal is to add 1 gal. We are serious about making this work, but I can't promise anything.
Looking forward to seeing what you come up with..
I'm hoping Clarke or IMS will do a see thru plastic tank, which will give us more range and a built in free fuel gauge.