Author Topic: New KX250AF build  (Read 19612 times)

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Offline sandblaster

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Re: New KX250AF build
« Reply #15 on: December 23, 2012, 09:13:30 AM »
I can't wait to hear your post ride report  :-D
The four stroke engine: That's one stroke for producing power and three for wearing the engine out.

Offline Foxx4Beaver

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Re: New KX250AF build
« Reply #16 on: December 23, 2012, 09:14:22 AM »
nice work....looks great!!..now,get polishing that pipe!!! :-D
Excuse me, ma'am...but you've got extremely nice legs!!!...what time do they open???                                                                                                               https://www.youtube.com/watch?v=n8tCgN3aryQ

Offline Danger4u2

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Re: New KX250AF build
« Reply #17 on: December 23, 2012, 09:24:33 AM »
Get us some video when you get it dialed in, so we can hear it.
Looks like it will be fun.
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Offline RoostDaddy

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Re: New KX250AF build
« Reply #18 on: December 23, 2012, 11:13:52 PM »
If that motor was complete with carb and electronics, I'm betting its a 2001 not 2000.  (The '01's came with the TMX carb)  Jetting was supposed to be a PITA so everyone was switching back to the 2000 carb. (PWK A/S)  Other than that the motors share the same components.
America is all about speed. Hot, nasty, bad-ass speed.

Offline silviocross

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Re: New KX250AF build
« Reply #19 on: December 26, 2012, 12:25:23 AM »
Hi everyone, I'm back from the very first ride.

First turn.... straight ahead. Oh right, engine braking is missing!

THE BIKE:

It's the same old kawa, the same riding position, same frame geometries and suspensions, but it looks like pretty different (obviously).
The engine weights just few kilos less, but the bike gives a great handle feeling. Can't wait to try it in the air. :wink:
I still need to find the right suspension settings, but time will come.

THE ENGINE:

men, this is weird.  :-o

It has no bottom end, doesn't accept the upper gear so you always have to ride with the clutch in hand.
Essentially, it runs like a 125 with double the power. When the exhaust valve opens, the bike takes off.

For sure, my ride-style is still for 4 strokes and I've to change it for this new engine, but the powerband has to be smoothed, otherwise I can't ride it like I want.

So much work needed for better jetting it on the lower-end side (thanks RoostDaddy for the info about the carb, maybe I've to switch back too) and I've to short the final transmission a bit to reach the stk CR 250.
If this doesn't work, I'll have to try deeper changes.

But hey men, this is a pretty amazing bike! :mrgreen:
http://progettosilvio.co.nf

If the facts don't fit the theory, change the facts
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Offline sandblaster

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Re: New KX250AF build
« Reply #20 on: December 26, 2012, 02:46:14 AM »
Thanks for the update!
Keep up the details.
The four stroke engine: That's one stroke for producing power and three for wearing the engine out.

Offline silviocross

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Re: New KX250AF build
« Reply #21 on: January 28, 2013, 06:51:32 AM »
Hi guys, many updates since my last post here.

I checked the engine and found that the powervalve was blocked wide open. That's why that ON-OFF behaviour on the first ride.

The custom radiator arrived:





Then I bought a BR8ECM spark plug, 10mm shorter than a standard one to have much clearance with the tank:



Lastly, I designed the new graphics, here you can see a preview:

http://progettosilvio.co.nf

If the facts don't fit the theory, change the facts
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Offline Foxx4Beaver

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Re: New KX250AF build
« Reply #22 on: January 28, 2013, 07:03:02 AM »
Very nice...who did the radiators if you don't mind me asking?...and price?
Excuse me, ma'am...but you've got extremely nice legs!!!...what time do they open???                                                                                                               https://www.youtube.com/watch?v=n8tCgN3aryQ

Offline silviocross

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Re: New KX250AF build
« Reply #23 on: January 28, 2013, 07:24:02 AM »
Very nice...who did the radiators if you don't mind me asking?...and price?

Radiators has been made by winner racing (http://www.winnerracing.com/index.html), it's a chinese factory but the quality is great.
They asked me 60$ for a std radiator, and 85$ for my custom one.
http://progettosilvio.co.nf

If the facts don't fit the theory, change the facts
[A. Einstein]

Offline Foxx4Beaver

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Re: New KX250AF build
« Reply #24 on: January 28, 2013, 07:29:42 AM »
d**n that's cheap....big question here....how well do they fit/line-up??
Excuse me, ma'am...but you've got extremely nice legs!!!...what time do they open???                                                                                                               https://www.youtube.com/watch?v=n8tCgN3aryQ

Offline silviocross

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Re: New KX250AF build
« Reply #25 on: January 28, 2013, 07:37:33 AM »
I just bought the custom one so I can't tell for standard replacements, but mine is really perfect, every dimension correspond with those I gave them. In my opinion they're really good.
http://progettosilvio.co.nf

If the facts don't fit the theory, change the facts
[A. Einstein]

Offline Foxx4Beaver

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Re: New KX250AF build
« Reply #26 on: January 28, 2013, 07:39:18 AM »
ok...thank you.
Excuse me, ma'am...but you've got extremely nice legs!!!...what time do they open???                                                                                                               https://www.youtube.com/watch?v=n8tCgN3aryQ

Offline silviocross

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Re: New KX250AF build
« Reply #27 on: February 01, 2013, 12:27:23 AM »
Refurbish a 10 years old engine is quite easy:

1 - remove the all Honda signatures
2 - sand clutch cover, waterpump and powervalve cover:





3 - powder coat them

http://progettosilvio.co.nf

If the facts don't fit the theory, change the facts
[A. Einstein]

Offline silviocross

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Re: New KX250AF build
« Reply #28 on: February 16, 2013, 10:00:24 PM »
Step by step I’m going forward, many details are missing yet but it looks promising..

put the monster energy decals, they said.....  :roll:































http://progettosilvio.co.nf

If the facts don't fit the theory, change the facts
[A. Einstein]

Offline silviocross

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Re: New KX250AF build
« Reply #29 on: February 23, 2013, 09:05:44 PM »
Still missing the radiator guards, but it's ready!!













 :mrgreen: :mrgreen:
http://progettosilvio.co.nf

If the facts don't fit the theory, change the facts
[A. Einstein]