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H4L H4L
6/30/2020 10:57 PM

Subed !!! I'm in SJ as well & need to come by to see this stuff in person ! tongue

Speak softly and carry a big stick.

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dawidslaby767 dawidslaby767
7/1/2020 4:04 AM

The biggest interest for me is the internal parts of the engine, how they are improved, what is changed so that everything works best. Great work and I look forward to continuing these amazing projectsw00t w00t

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Banana_oil Banana_oil
7/1/2020 8:47 AM
matt.3150 wrote:

Here’s 1994 HRC RC125 ...more

Amazing collection! Have you compared the geometry of the cases and the porting of cylinder with stock parts?

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matt.3150 matt.3150
7/1/2020 12:01 PM
matt.3150 wrote:

Here’s 1994 HRC RC125 ...more

Banana_oil wrote:

Amazing collection! Have ...more

The cases have some differences nothing really really major, the cylinder has some differences also but more major.

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matt.3150 matt.3150
7/1/2020 12:45 PM
dawidslaby767 wrote:

The biggest interest for ...more

Well on the case there is a ton of epoxy work done to them, they actually made molds so they could replicate the shape in the reef valve area! The cylinder has made to use orings on the head, also ported and added epoxy at the bottom of the ports to change how the fuel mixture flows into the cylinder. The entire exhaust was plugs with aluminum and they remachined in with the opposite shaped D hole. The power valves were brazed up and reshaped fir a much tighter seal to increase psi , much less blow by.

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matt.3150 matt.3150
7/1/2020 12:47 PM

Photo

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Chris99Flannery Chris99Flannery
7/1/2020 6:15 PM

Hard to see with the 2D of a photo, but the reed box seems quite intrusive to the flow into transfers. I wonder why such little expoxy in the corners, to reinforce/patch bolt holes? Interested in epoxy placement in the transfer.
With the raised floor ex duct floor how is the manifold interface?
Where these US Honda developed cylinders?
Thanks for the time and effort of posting. Keen to see dyno runs when back together.

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braaap707 braaap707
7/1/2020 6:51 PM

Wow I'm a sucker for hrc goodies but this is overload. I keep going over the pics. Just wow. Girlfriend keeps nagging me cause i havent paid her attention since I've opened the thread a hour ago lol Each bike u named and showed so far are all damn awesome bikes. Keep the pics coming and when u get a chance make individual builds for each !!

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matt.3150 matt.3150
7/1/2020 8:52 PM
Chris99Flannery wrote:

Hard to see with the 2D of ...more

Yes it was developed by AHM with some help from Japan, one of my closest friend is one of the guys that did the majority of R&D work. So as far as the reed valve area goes, From my understand the important part is the shape of that area not flow rates, opening things up so the air fuel mixture would flow better was not the best for power, or ridable power. Also the amount of bottom end compression is important there’s a give and a take with allot of this stuff, and the amount of volume in that area make a different as also. Everything that they came up with was check on the dyno to make sure thing were moving in the right direction.

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Banana_oil Banana_oil
7/1/2020 9:34 PM

Very interesting! How about exhaust port shape and timing? How wide is it and is the duration different?

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matt.3150 matt.3150
7/1/2020 10:00 PM
Banana_oil wrote:

Very interesting! How ...more

Well since it’s a long rod and a spacer plate goes under neith the cylinder, I could not really tell you, But I can’t give you too much!

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Chris99Flannery Chris99Flannery
7/2/2020 2:27 AM
Chris99Flannery wrote:

Hard to see with the 2D of ...more

matt.3150 wrote:

Yes it was developed by ...more

Ive expoxied my 99 reed cavity and ground more angle up towards the transfers. Using a rad valve with custom thin reeds. Also i welded my exhaust manifold to match and suit my exhaust duct, among another list of things.
Totally agree, changing one thing requires careful consideration of parts of the engine cycle. Either way i’m gaining with my CR.
Cant wait to see more and maybe some dyno time if you do.

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Pgd09yz450 Pgd09yz450
7/2/2020 4:48 AM

Nice bike!! There's some expert level bike builders on here

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chickenstrips721 chickenstrips721
7/2/2020 6:03 AM

Incredible build, can’t wait to see the finished product!

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matt.3150 matt.3150
7/2/2020 4:23 PM

Here’s a bit if a mock up, not the engine that will be in the final build, also have a different frame. But It’s just a visual mock up Photo

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matt.3150 matt.3150
7/2/2020 11:22 PM

So here’s some HRC 2003-2004 engine kit. Photo

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matt.3150 matt.3150
7/2/2020 11:23 PM

Oh yea forgot about the HRC works crank for the RC250 Photo

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H4L H4L
7/3/2020 7:36 PM
matt.3150 wrote:

So here’s some HRC ...more

WOW ! Very interested in the entire set up if you're willing to sell it..

Speak softly and carry a big stick.

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matt.3150 matt.3150
7/4/2020 1:17 PM
matt.3150 wrote:

So here’s some HRC ...more

H4L wrote:

WOW ! Very interested in ...more

Sorry I been collecting parts for years, so at this point I don’t want to sell anything, I finally am ready to start building bikes

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matt.3150 matt.3150
7/4/2020 1:18 PM

Back to the 125 a bit updated picture Photo

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matt.3150 matt.3150
7/4/2020 1:19 PM

Once I get the cases back from the welder, I can start my engine build!

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deccr250 deccr250
7/4/2020 1:42 PM
matt.3150 wrote:

Once I get the cases back ...more

Can’t wait to see this build get going bud, going to be amazing smile

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matt.3150 matt.3150
7/4/2020 11:56 PM
matt.3150 wrote:

So here’s some HRC ...more

If you guys look closely at the 2003-2004 works HRC parts, look at the Hinson pressure plate, it’s says Works on it. Just some of the little thing I noticed !

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H4L H4L
7/5/2020 8:49 AM
matt.3150 wrote:

Sorry I been collecting ...more

I understand. If you change your mind let me know. Thnxz...
Looking forward to some of your builds !

Speak softly and carry a big stick.

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MaxPower MaxPower
7/5/2020 9:57 AM

Is this going to be a rider or a dust collector?

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matt.3150 matt.3150
7/5/2020 10:29 AM
MaxPower wrote:

Is this going to be a ...more

This is going to be a rider!!!

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matt.3150 matt.3150
7/7/2020 5:45 PM

Here’s a mock up of my 1994 HRC CR125 factory engine, sand cast cases, real HRC magnesium ignition cover and power valve covers.
Photo

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matt.3150 matt.3150
7/8/2020 6:09 PM
Photo
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NoMuff2Tuff NoMuff2Tuff
7/9/2020 11:14 AM

CR die hard here!! keep the post and pics coming. How much RWHP on the dyno did the HRC motors make in the early to mid 2000's?

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wasummer46 wasummer46
7/9/2020 1:57 PM

If your still asking suggestions regarding the Carb. I'm extremely pleased with the current setting on my PWK airstriker 38mm. You will lose some mid-range power so I retarded the powervalve to compensate and the bike rips. I also don't need to change the jetting mid afternoon or foul plugs like the stock carb did.

I know this appears to be a show bike, but drill holes in the airbox like Husky and KTM have. The bike is starving for air!

@wasummer46

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