Monster Energy | Villopoto Rides the KX327 at Ironman

dfoerster92
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Location
Olney, IL, USA
9/11/2026 12:12pm

May be a dumb question but 32.1 or a 60.1 like the ktms

Fearnot
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Location
Grand Island, NY, USA
9/11/2026 12:20pm

May be a dumb question but 32.1 or a 60.1 like the ktms

I saw 32:1 they recommended but I'll run Motul 800 50:1.

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bodycast
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Location
Monroe, NC, USA
9/11/2026 2:07pm

May be a dumb question but 32.1 or a 60.1 like the ktms

Fearnot wrote:

I saw 32:1 they recommended but I'll run Motul 800 50:1.

Carefull.  Lots of people decided to do thier own thing when it came to oil mixture on ktms.  Then the bike did not run well or worse then they blamed the fuel injection.

Zerofear66
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Anaheim, CA, USA
9/11/2026 2:51pm

I wonder who's going come out with a 500 kit first😄

The Shop

OldTech
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Decatur, AL, USA
9/11/2026 5:25pm
I've owned my 2006 KX250 since 2011, many years ago Wiseco offered a "Racer's Choice" piston for it, which featured a single TiN coated ring (edit...

I've owned my 2006 KX250 since 2011, many years ago Wiseco offered a "Racer's Choice" piston for it, which featured a single TiN coated ring (edit: looks like you can still find them).

The last gen KX250 always barked and sounded great out of the box, back when silencers didn't have to meet any requirements and choke them up. Then you add an R304 shorty and the single ring piston, my KX sounds absolutely insane.

Too bad I don't ride it anymore :D

Got one downstairs..155 0.jpg?VersionId=H7Cn5U

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9/11/2026 6:12pm
Bearuno wrote:
Has anyone seen the Bore and Stroke of the 327 yet?Buggered if I can find it, but, admittedly, I'm a bit of a doofus with my...

Has anyone seen the Bore and Stroke of the 327 yet?

Buggered if I can find it, but, admittedly, I'm a bit of a doofus with my Internet searching - couldn't find any info on it in the Kawi site yesterday. 

If they use the near std stroke of 250s : 72mm, it would be a 76mm bore to bring it to 326.67cc. That would be logical, because I really do  think a 250 will end up coming from Kawasaki. 

Kawasaki hasn't announced the Bore and Stroke, but it is marked on the left side of the crankcase...Unfortunately none of the videos or photos are higher...

Kawasaki hasn't announced the Bore and Stroke, but it is marked on the left side of the crankcase...

image 3749.png?VersionId=0slimBjWvKV6WF3JgM3H6

Unfortunately none of the videos or photos are higher enough resolution to read it!

RDnutz wrote:

you sure that's bore & stroke there? I've seen CC there frequently on most bikes, but don't remember ever seeing B&S there.

Kawasaki traditionally marked the stroke on the crankcase...

image 3745.png?VersionId=Q0ac1EdWsN02w c0aiAt
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RDnutz
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9/11/2026 7:43pm
Kawasaki hasn't announced the Bore and Stroke, but it is marked on the left side of the crankcase...Unfortunately none of the videos or photos are higher...

Kawasaki hasn't announced the Bore and Stroke, but it is marked on the left side of the crankcase...

image 3749.png?VersionId=0slimBjWvKV6WF3JgM3H6

Unfortunately none of the videos or photos are higher enough resolution to read it!

RDnutz wrote:

you sure that's bore & stroke there? I've seen CC there frequently on most bikes, but don't remember ever seeing B&S there.

Kawasaki traditionally marked the stroke on the crankcase...

Kawasaki traditionally marked the stroke on the crankcase...

image 3745.png?VersionId=Q0ac1EdWsN02w c0aiAt

thanks for that. I was wrong 2 different ways- I thought we were looking at the bottom of the cylinder which is where most the 2 strokes I owned (majority Yamaha) show CC. Also, I've only owned 2 Kawis: 1985 KX250 and 2003 KDX220R which I never did any motor repairs on and rode em and parked em. Never paid close enough attention to crankcases to see the markings on the case as I never needed to do any top end work. My Bad.

9/11/2026 7:56pm
RDnutz wrote:

you sure that's bore & stroke there? I've seen CC there frequently on most bikes, but don't remember ever seeing B&S there.

Kawasaki traditionally marked the stroke on the crankcase...

Kawasaki traditionally marked the stroke on the crankcase...

image 3745.png?VersionId=Q0ac1EdWsN02w c0aiAt
RDnutz wrote:
thanks for that. I was wrong 2 different ways- I thought we were looking at the bottom of the cylinder which is where most the 2...

thanks for that. I was wrong 2 different ways- I thought we were looking at the bottom of the cylinder which is where most the 2 strokes I owned (majority Yamaha) show CC. Also, I've only owned 2 Kawis: 1985 KX250 and 2003 KDX220R which I never did any motor repairs on and rode em and parked em. Never paid close enough attention to crankcases to see the markings on the case as I never needed to do any top end work. My Bad.

Kawasaki has been inconsistent in their markings, I could be wrong, it may be the engine number.

I find it interesting the publicity photos are of the right side of the bike, all the public showings have hidden the left side, they maybe trying to advertise the expansion chamber, there are no close up photos of the left side of the motor, only CAD renderings.

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9/11/2026 8:09pm

Keefer teasing a ride video from ironman at the end of his short Osborne beta 450 test.

Bearuno
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AU
9/11/2026 8:29pm
Kawasaki hasn't announced the Bore and Stroke, but it is marked on the left side of the crankcase...Unfortunately none of the videos or photos are higher...

Kawasaki hasn't announced the Bore and Stroke, but it is marked on the left side of the crankcase...

image 3749.png?VersionId=0slimBjWvKV6WF3JgM3H6

Unfortunately none of the videos or photos are higher enough resolution to read it!

L2S : Yup, I've been trying to read that too!

What gives ? 

I try 'Enhance, ENHANCE ', like I see in all the Movies, BUT  it Does Not Work ! 

Just like "The Goggles, They Have No Effect !"

I don't know what to believe, anymore .............. 😭

1
9/11/2026 11:13pm Edited Date/Time 9/11/2026 11:15pm
Kawasaki hasn't announced the Bore and Stroke, but it is marked on the left side of the crankcase...Unfortunately none of the videos or photos are higher...

Kawasaki hasn't announced the Bore and Stroke, but it is marked on the left side of the crankcase...

image 3749.png?VersionId=0slimBjWvKV6WF3JgM3H6

Unfortunately none of the videos or photos are higher enough resolution to read it!

Bearuno wrote:
L2S : Yup, I've been trying to read that too!What gives ? I try 'Enhance, ENHANCE ', like I see in all the Movies, BUT  it Does...

L2S : Yup, I've been trying to read that too!

What gives ? 

I try 'Enhance, ENHANCE ', like I see in all the Movies, BUT  it Does Not Work ! 

Just like "The Goggles, They Have No Effect !"

I don't know what to believe, anymore .............. 😭

We both need better software

image 3752

The first 5 letters look like KX327, it may be a identification number, not the stroke.

 

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9/11/2026 11:45pm
SEEMEFIRST wrote:

What makes Ironman "infamous", or does the writer not know what it means?

Fearnot
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Location
Grand Island, NY, USA
9/12/2026 6:59am
Zerofear66 wrote:

I wonder who's going come out with a 500 kit first😄

Probably BRC but 500's are kind of pointless when you get into the big CC's on two strokes. Yamaha said around 170cc is about as big as you go before diminishing returns becomes so high you aren't gaining the horsepower a four stroke does by simply increasing displacement. Look how the 250f's are passing the 2 strokes in horsepower outright they aren't held back by their design and limited to 9-10k rpm they just keep pulling to 13-15k. Same thing with your big 500's yea if they could get anywhere close to 13k rpm they could compete with modern 450's but they cant and are limited to 8k. 125's don't have that issue with equal displacement four strokes because they can still rip to 13k.

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ky_savage
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Location
Kentucky, KY, USA
9/12/2026 7:06am

Are the Japanese manufacturers ever going to get away from 32:1?

1
9/12/2026 7:36am
Zerofear66 wrote:

I wonder who's going come out with a 500 kit first😄

Fearnot wrote:
Probably BRC but 500's are kind of pointless when you get into the big CC's on two strokes. Yamaha said around 170cc is about as big...

Probably BRC but 500's are kind of pointless when you get into the big CC's on two strokes. Yamaha said around 170cc is about as big as you go before diminishing returns becomes so high you aren't gaining the horsepower a four stroke does by simply increasing displacement. Look how the 250f's are passing the 2 strokes in horsepower outright they aren't held back by their design and limited to 9-10k rpm they just keep pulling to 13-15k. Same thing with your big 500's yea if they could get anywhere close to 13k rpm they could compete with modern 450's but they cant and are limited to 8k. 125's don't have that issue with equal displacement four strokes because they can still rip to 13k.

250 2 strokes can rev significantly higher than 9-10k, 15k is common in shifter karts, but to achieve those revs, different ignitions, expansion chambers and porting  is required, along with more frequent top end rebuilds.

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1
9/12/2026 7:41am
ky_savage wrote:

Are the Japanese manufacturers ever going to get away from 32:1?

No, they don't want to be liable for their bikes seizing, but feel free to run whatever oil ration you like.

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Fearnot
Posts
11
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9/9/2026
Location
Grand Island, NY, USA
9/12/2026 7:45am
Zerofear66 wrote:

I wonder who's going come out with a 500 kit first😄

Fearnot wrote:
Probably BRC but 500's are kind of pointless when you get into the big CC's on two strokes. Yamaha said around 170cc is about as big...

Probably BRC but 500's are kind of pointless when you get into the big CC's on two strokes. Yamaha said around 170cc is about as big as you go before diminishing returns becomes so high you aren't gaining the horsepower a four stroke does by simply increasing displacement. Look how the 250f's are passing the 2 strokes in horsepower outright they aren't held back by their design and limited to 9-10k rpm they just keep pulling to 13-15k. Same thing with your big 500's yea if they could get anywhere close to 13k rpm they could compete with modern 450's but they cant and are limited to 8k. 125's don't have that issue with equal displacement four strokes because they can still rip to 13k.

250 2 strokes can rev significantly higher than 9-10k, 15k is common in shifter karts, but to achieve those revs, different ignitions, expansion chambers and porting...

250 2 strokes can rev significantly higher than 9-10k, 15k is common in shifter karts, but to achieve those revs, different ignitions, expansion chambers and porting  is required, along with more frequent top end rebuilds.

That's because they are twins so the cylinders remain small. Big bore singles just fall off with what they can deliver on two strokes is my point.

1
9/12/2026 8:00am
Fearnot wrote:
Probably BRC but 500's are kind of pointless when you get into the big CC's on two strokes. Yamaha said around 170cc is about as big...

Probably BRC but 500's are kind of pointless when you get into the big CC's on two strokes. Yamaha said around 170cc is about as big as you go before diminishing returns becomes so high you aren't gaining the horsepower a four stroke does by simply increasing displacement. Look how the 250f's are passing the 2 strokes in horsepower outright they aren't held back by their design and limited to 9-10k rpm they just keep pulling to 13-15k. Same thing with your big 500's yea if they could get anywhere close to 13k rpm they could compete with modern 450's but they cant and are limited to 8k. 125's don't have that issue with equal displacement four strokes because they can still rip to 13k.

250 2 strokes can rev significantly higher than 9-10k, 15k is common in shifter karts, but to achieve those revs, different ignitions, expansion chambers and porting...

250 2 strokes can rev significantly higher than 9-10k, 15k is common in shifter karts, but to achieve those revs, different ignitions, expansion chambers and porting  is required, along with more frequent top end rebuilds.

Fearnot wrote:
That's because they are twins so the cylinders remain small. Big bore singles just fall off with what they can deliver on two strokes is my...

That's because they are twins so the cylinders remain small. Big bore singles just fall off with what they can deliver on two strokes is my point.

You are thinking of 250 Supercarts, down under we have a 250 National class, which uses single cylinder 2 stokes, 12-15k is common...

https://www.superkartsnsw.com.au/classes/250national/

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Fearnot
Posts
11
Joined
9/9/2026
Location
Grand Island, NY, USA
9/12/2026 8:43am
250 2 strokes can rev significantly higher than 9-10k, 15k is common in shifter karts, but to achieve those revs, different ignitions, expansion chambers and porting...

250 2 strokes can rev significantly higher than 9-10k, 15k is common in shifter karts, but to achieve those revs, different ignitions, expansion chambers and porting  is required, along with more frequent top end rebuilds.

Fearnot wrote:
That's because they are twins so the cylinders remain small. Big bore singles just fall off with what they can deliver on two strokes is my...

That's because they are twins so the cylinders remain small. Big bore singles just fall off with what they can deliver on two strokes is my point.

You are thinking of 250 Supercarts, down under we have a 250 National class, which uses single cylinder 2 stokes, 12-15k is common...

https://www.superkartsnsw.com.au/classes/250national/

The article you listed says they rev to 10k rpm.

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Kawboy14!
Posts
521
Joined
5/15/2021
Location
Georgetown, TX, USA
9/12/2026 8:46am

Sounds like a crisp, reliable KX500!

9/12/2026 8:57am
Fearnot wrote:
That's because they are twins so the cylinders remain small. Big bore singles just fall off with what they can deliver on two strokes is my...

That's because they are twins so the cylinders remain small. Big bore singles just fall off with what they can deliver on two strokes is my point.

You are thinking of 250 Supercarts, down under we have a 250 National class, which uses single cylinder 2 stokes, 12-15k is common...

https://www.superkartsnsw.com.au/classes/250national/

Fearnot wrote:

The article you listed says they rev to 10k rpm.

Upwards of 10,000 rpm...

image 3764.png?VersionId=APc8PlDAXJDivwEiclP1R

12-15k is common.

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