125cc stroker project :D

Koert · Post by **Koert** » Sat Jan 22, 2011 1:32 pm

Well here are some pictures from the cases!

Koert · Post by **Koert** » Sat Jan 22, 2011 1:35 pm

Some more pictures!

Koert

z50r-ghost · Post by **z50r-ghost** » Sat Jan 22, 2011 6:59 pm

Nice work and great pics!! That bore and crank are HUGE!!!

Koert · Post by **Koert** » Sat Jan 22, 2011 7:03 pm

Monday I'm gonna visit a local tuner, to see what we can do.

He has a Yamaha DT50mx himself 14hp at the wheel

Koert

Koert · Post by **Koert** » Sat Jan 22, 2011 7:19 pm

Oh!
I have a question: Do you guys modify or use an other ignition?
Or do you use the original one?

Koert

bakaracer · Post by **bakaracer** » Sat Jan 22, 2011 8:10 pm

The stock cdi here in the states works fine all the way to at least 15k that I know of.the coil on the other hand,I would use a higher output coil for the higher compression you will be using or use a nology wire set.the spark will have a hard time making the jump with a high reving high compression engine.

Koert · Post by **Koert** » Sun Jan 23, 2011 8:54 am

So the ignition and flywheel itself stay unchanged?
No inner rotor ignitions? programmable CDI's etc?
Wouldn't it be a good idea to use a innerrotor?
The only problem I can think of is that the cooling would ben tricky...

Koert

bakaracer · Post by **bakaracer** » Sun Jan 23, 2011 4:52 pm

if you have the money to spend on those stuff,they will for sure help. the rotor kit more than anything. going from the heavy steel mag/flywheel to an aluminum one.that will free up some rpms and let the motor rev up faster too.

Koert · Post by **Koert** » Tue Jan 25, 2011 2:38 pm

I brought the engine to the tuner yesterday!

We desided that we will not weld extra material around the intake, because there isnt enough room for it.

I'm thinking about making the holes in the groundplate of the ignition into slots.. that way I can adjust the ignition timing..

The flywheel will allso be lightend (6)

Koert

Wheelman-111 · Post by **Wheelman-111** » Tue Jan 25, 2011 3:16 pm

Greetings:

Very nice work Koert!

The last issue to conquer might be getting the cooling shrouds to fit around that tall cylinder. Have you test-fitted them?

Koert · Post by **Koert** » Tue Jan 25, 2011 3:50 pm

I haven't test fitted the cooling shrouds yet!

I didn't really have the time for it, and to be honest I hadn't thought about it yet..

I hope the tuner is finisched soon!

And I'm allso looking for a different front fork...

Koert

Koert · Post by **Koert** » Sat Jan 29, 2011 12:18 pm

Well I have a nice intake manifold now!

It is an original Honda CR85 manifold!

My carb fits perfectly!

Koert

Trafficjamz · Post by **Trafficjamz** » Sat Jan 29, 2011 12:22 pm

Does that setup use the stock reeds?

Why not just use the ct manifold and the bigger reed cage?

I am afraid that the stock reed cage will restrict your 125cc setup.

Koert · Post by **Koert** » Sat Jan 29, 2011 12:28 pm

I will be using the CR85 reedcage.
And I don't think that the CR85 reeds will restrict it at all

Why I don't use a CT manifold: I have to have it shipped from the other side of the ocean

And I am a verry impatient person!

Koert

Trafficjamz · Post by **Trafficjamz** » Sat Jan 29, 2011 12:42 pm

Koert wrote:I will be using the CR85 reedcage.
And I don't think that the CR85 reeds will restrict it at all
Why I don't use a CT manifold: I have to have it shipped from the other side of the ocean
And I am a verry impatient person!

Koert

Too far?

my parts come from Taiwan too.

great build so far

keep up the good work.

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125cc stroker project :D

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