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

[Rob.G]

Originally Posted by MrFurious

Is Bill still in business? I read on another site that he was planning to close up shop at the end of the summer and it appears they shut down the website.

The website went down due to an issue with his ISP and the developer who created it. He has a new one under construction now and it should be up in the near future. He's still in business. I exchanged several emails with him about this last week.

Rob

[MrFurious]

Good to know!

[DurtDevil]

I've been planning to purchase the 351 kit this winter, and was starting to look around to confirm pricing and get the ball rolling... and couldn't find his site anywhere. Definitely getting worried... 3 years on KLX w/5000+ miles now, been planning all along to mod up and really put a motor on this fun bike - and he disappeared.
Whoever gets Bill's new website address, please provide here - thanks!

[Danger4u2]

Yes, still going strong. I contacted him this morning here's what he said.

"Hello David,
I have not closed the shop. Still going strong, my web site went down last week because the person that was taking care of it decides he didn't want to mess with it any more. My son & grandson are making a new web site for me, hope to have it up & running by this week end. If you could help spread the word that I am still in busyness & doing well that would be appreciated. Glad you are happy with the 351 kit
Thanks
Bill "

I've been really surprised at the little KLX and how I've really come to like that bike, now that it's a 351cc. Riding in the rugged, rocky hills of the Kiamichi Mountains in S.E. Oklahoma last month the Dunlop GeoMax MX71's have held up quite well. It hasn't chunked off any knobbies like the tires on the other riders bikes. I also took my CR500 for the first time in this area and rode it one day. Man was it a hand full down there. Way more fun riding it on the sand at Little Sahara Oklahoma. It had an older Michelin rear tire and it ate off all the knobs on both out side rows. Riding on sharp rocks up and down steep hills will be a brutal test on any tire. I have 2200 miles on the KLX since Bill's kit and no problems.

[uaza]

anyone here has the 351 kit on a Fuel injected KLX250 (or in this case D-tracker X)?
here in Brazil they are imported from thailand and are FI.

I wonder how well/easy to adjust

[MrFurious]

Originally Posted by uaza

anyone here has the 351 kit on a Fuel injected KLX250 (or in this case D-tracker X)?
here in Brazil they are imported from thailand and are FI.

I wonder how well/easy to adjust

From what little I've read on Kawasaki Forums you need a JuiceBox or Power Commander with a custom fuel map. Those who have done it (mostly in the Philippines) report that the stock fuel injector seems to be up to the task at stock fuel pressure, so no need to upgrade the injector or pressure regulator.

Here's a link to a thread about a programmable ECU that's available in Thailand.
http://www.kawasakiforums.com/forum/...-klx250-36083/

[danceswithcages]

Any word on Bill's new web address??

I've searched the web and can't come up with any info on where to buy his kit.

I'm seriously considering a KLX250 as my next bike, but only if the 351 kit is still available.

[IDRIDR]

http://www.bandbcyclerestoration.com/

[danceswithcages]

Originally Posted by IDRIDR

http://www.bandbcyclerestoration.com/

Thank you!

[tony.bike]

Did you get your 351 kit yet danceswithcages? I am just getting ready to install mine. Looking forward to seeing how this all works out.

[xxaarraa]

OK, I read all 10 pages but still have an elementary question. The 22HP shown on the dyno - I am assuming that is at the wheel correct? Cannot be at the crank? I mean, stock bike makes 18 HP so I would hope the 351 kit nets more than 4 HP.

Can anyone please confirm?

[Stumpy Pete]

Originally Posted by xxaarraa

OK, I read all 10 pages but still have an elementary question. The 22HP shown on the dyno - I am assuming that is at the wheel correct? Cannot be at the crank? I mean, stock bike makes 18 HP so I would hope the 351 kit nets more than 4 HP.

Can anyone please confirm?

I see the dyno chart, and I agree that the 22hp seems a little weak. I think the point of the big-bore kit is more low-end torque than high-end power.
I think it's interesting that the 351 makes within 1 ft.-lb. of max torque at 3750 rpm. I also think it's worth noting that the chart is for a bike with the 351 kit, but with stock exhaust and stock carb.

I'd be interested in an incremental series that charted the benefits of the Mikuni carb and an aftermarket or KLX300 exhaust. It'd be nice to see a chart for a stock KLX250, too, but I realize dyno runs aren't free.

[Danger4u2]

Originally Posted by Stumpy Pete

I see the dyno chart, and I agree that the 22hp seems a little weak. I think the point of the big-bore kit is more low-end torque than high-end power.
I think it's interesting that the 351 makes within 1 ft.-lb. of max torque at 3750 rpm. I also think it's worth noting that the chart is for a bike with the 351 kit, but with stock exhaust and stock carb.

I'd be interested in an incremental series that charted the benefits of the Mikuni carb and an aftermarket or KLX300 exhaust. It'd be nice to see a chart for a stock KLX250, too, but I realize dyno runs aren't free.

I took my bike to Bill Blue and he did my conversion. His 351cc kit/ pumper carburetor, my supplied full FMF Q4 and KLX snorkel. I've put about 4,000 miles on it without any problems. Don't know what the horsepower is but I really enjoy the KLX now. It's my go to fun bike. I did drop one tooth on the front sprocket for more low end, runs comfortable at 55 mph but it will still do 70 mph for short bursts.

[Stumpy Pete]

Originally Posted by xxaarraa

OK, I read all 10 pages but still have an elementary question. The 22HP shown on the dyno - I am assuming that is at the wheel correct? Cannot be at the crank? I mean, stock bike makes 18 HP so I would hope the 351 kit nets more than 4 HP.

Can anyone please confirm?

The short answer is yes, the 351 bore kit alone will get you roughly five hp and five ft-lbs.

Stock: 19.30hp, 13.12 ft-lb


With big-bore kit: 24.58 hp and 18.75 ft-lbs


More power and torque is available with further modifications.

http://www.kawasakiforums.com/forum/...e2/#post482824

I like that much of the gain is available between 4000 and 5000 rpms. I haven't done any of this yet, but I'm thinking about starting with the piston and cylinder and possibly doing the pumper carb later.