2024 Kawasaki KX450 and KX450X

Sandusky26
Posts
3460
Joined
7/28/2021
Location
Eastern, NC, USA
4/11/2024 5:17am
Markee wrote:
Spring rates are a little confusing on this bike. Race Tech has me 5 rates off of stock (lighter). I'm 175lbs VET / A-B So this...

Spring rates are a little confusing on this bike. Race Tech has me 5 rates off of stock (lighter). I'm 175lbs VET / A-B So this thing is sprung for a 200lb intermediate rider?

What spring rates did your tuners or yourself end up with based off your speed and weight??

Total Control suspension dialed me in with.52's (2 spring rates up from stock) and 380cc's of oil. I'm 170 and my stuff is super plush.

2
4/11/2024 5:23am Edited Date/Time 4/11/2024 5:29am
Markee wrote:
Spring rates are a little confusing on this bike. Race Tech has me 5 rates off of stock (lighter). I'm 175lbs VET / A-B So this...

Spring rates are a little confusing on this bike. Race Tech has me 5 rates off of stock (lighter). I'm 175lbs VET / A-B So this thing is sprung for a 200lb intermediate rider?

What spring rates did your tuners or yourself end up with based off your speed and weight??

If that’s for motocross, you must have put something in the calculator wrong.  Did you put your weight in kilos instead of pounds?  For reference, I’m 6’3” 215lb motocross +40B racer and I had to put a single optional stiffer spring in one fork and go from the stock 5.5nm shock spring to a 5.9kg (which I had to round up to 6.0, since 5.9 was not available).  Feels correct now and I have the correct free sag measurement.

petow23
Posts
11
Joined
1/4/2020
Location
Akron, OH, USA
4/11/2024 5:24am
Markee wrote:
Spring rates are a little confusing on this bike. Race Tech has me 5 rates off of stock (lighter). I'm 175lbs VET / A-B So this...

Spring rates are a little confusing on this bike. Race Tech has me 5 rates off of stock (lighter). I'm 175lbs VET / A-B So this thing is sprung for a 200lb intermediate rider?

What spring rates did your tuners or yourself end up with based off your speed and weight??

I find it confusing because I am 210 lbs and Kawasaki recomends the 56 N/MM spring (about 5.7 KG/MM) and Race Tech recommends a 5.9 KG/MM spring. 

MX529
Posts
76
Joined
3/26/2024
Location
Wilmington, NC, USA
4/11/2024 5:31am

This bike rips…🏁

 once you uncork it from stock exhaust.. full PC T6 with Chaz remap of efi system, air box grommet pulled.. like day and night compared to stock..you can easily pull third gear in some corners..  did get a tiny bit of detonation doing so, only on slightly less roll speeds but it’s also running just pump gas at this point, till the switch over

 

all the tester hype only applys to stock configuration.. this bike could’ve easily been number one after a few simple mods 

 

8

The Shop

4/11/2024 6:01am
MX529 wrote:
This bike rips…🏁  once you uncork it from stock exhaust.. full PC T6 with Chaz remap of efi system, air box grommet pulled.. like day and...

This bike rips…🏁

 once you uncork it from stock exhaust.. full PC T6 with Chaz remap of efi system, air box grommet pulled.. like day and night compared to stock..you can easily pull third gear in some corners..  did get a tiny bit of detonation doing so, only on slightly less roll speeds but it’s also running just pump gas at this point, till the switch over

 

all the tester hype only applys to stock configuration.. this bike could’ve easily been number one after a few simple mods 

 

Try mixing one gallon of 110 octane race gas to 2 gallons of 93 octane pump.  That is fairly cheap insurance against detonation.  I just keep a couple of old 5 gallon race gas cans in the garage and fill them with the 110 from the pump when I get low on the race gas.  I then dump a gallon into my gas can then add the 2 gallons of pump gas on my way to the track.

3
Sandusky26
Posts
3460
Joined
7/28/2021
Location
Eastern, NC, USA
4/11/2024 6:34am
MX529 wrote:
This bike rips…🏁  once you uncork it from stock exhaust.. full PC T6 with Chaz remap of efi system, air box grommet pulled.. like day and...

This bike rips…🏁

 once you uncork it from stock exhaust.. full PC T6 with Chaz remap of efi system, air box grommet pulled.. like day and night compared to stock..you can easily pull third gear in some corners..  did get a tiny bit of detonation doing so, only on slightly less roll speeds but it’s also running just pump gas at this point, till the switch over

 

all the tester hype only applys to stock configuration.. this bike could’ve easily been number one after a few simple mods 

 

I might have more laps on that track than anyone in history.

lumpy790
Posts
11615
Joined
9/18/2007
Location
York, SC, USA
4/11/2024 7:00am
lumpy790 wrote:

Markee wrote:

No black hoses?

Correct.

Years ago We did a production run on black hoses after Millsaps asked us to make them for him.

Those black hoses are still sitting on the shelf. They do not sell.

2
MX529
Posts
76
Joined
3/26/2024
Location
Wilmington, NC, USA
4/11/2024 7:45am
MX529 wrote:
This bike rips…🏁  once you uncork it from stock exhaust.. full PC T6 with Chaz remap of efi system, air box grommet pulled.. like day and...

This bike rips…🏁

 once you uncork it from stock exhaust.. full PC T6 with Chaz remap of efi system, air box grommet pulled.. like day and night compared to stock..you can easily pull third gear in some corners..  did get a tiny bit of detonation doing so, only on slightly less roll speeds but it’s also running just pump gas at this point, till the switch over

 

all the tester hype only applys to stock configuration.. this bike could’ve easily been number one after a few simple mods 

 

Try mixing one gallon of 110 octane race gas to 2 gallons of 93 octane pump.  That is fairly cheap insurance against detonation.  I just keep...

Try mixing one gallon of 110 octane race gas to 2 gallons of 93 octane pump.  That is fairly cheap insurance against detonation.  I just keep a couple of old 5 gallon race gas cans in the garage and fill them with the 110 from the pump when I get low on the race gas.  I then dump a gallon into my gas can then add the 2 gallons of pump gas on my way to the track.

Normally just run Sunoco 98 race fuels.. these bikes don’t need that much octane, specially stock 

1
MX529
Posts
76
Joined
3/26/2024
Location
Wilmington, NC, USA
4/11/2024 8:06am
MX529 wrote:
This bike rips…🏁  once you uncork it from stock exhaust.. full PC T6 with Chaz remap of efi system, air box grommet pulled.. like day and...

This bike rips…🏁

 once you uncork it from stock exhaust.. full PC T6 with Chaz remap of efi system, air box grommet pulled.. like day and night compared to stock..you can easily pull third gear in some corners..  did get a tiny bit of detonation doing so, only on slightly less roll speeds but it’s also running just pump gas at this point, till the switch over

 

all the tester hype only applys to stock configuration.. this bike could’ve easily been number one after a few simple mods 

 

Sandusky26 wrote:

I might have more laps on that track than anyone in history.

Funny! Never see you out there?  
 

won many night races on that track.. great under race conditions, otherwise not so much..only went cause JWTF was closed for SEMA race weekend 

Sandusky26
Posts
3460
Joined
7/28/2021
Location
Eastern, NC, USA
4/11/2024 8:10am
MX529 wrote:
This bike rips…🏁  once you uncork it from stock exhaust.. full PC T6 with Chaz remap of efi system, air box grommet pulled.. like day and...

This bike rips…🏁

 once you uncork it from stock exhaust.. full PC T6 with Chaz remap of efi system, air box grommet pulled.. like day and night compared to stock..you can easily pull third gear in some corners..  did get a tiny bit of detonation doing so, only on slightly less roll speeds but it’s also running just pump gas at this point, till the switch over

 

all the tester hype only applys to stock configuration.. this bike could’ve easily been number one after a few simple mods 

 

Sandusky26 wrote:

I might have more laps on that track than anyone in history.

MX529 wrote:
Funny! Never see you out there?     won many night races on that track.. great under race conditions, otherwise not so much..only went cause JWTF...

Funny! Never see you out there?  
 

won many night races on that track.. great under race conditions, otherwise not so much..only went cause JWTF was closed for SEMA race weekend 

I posted about it in another thread. Last summer a kid crashed in my moto and they spent the whole race looking for the red flag, that was the last time I raced there.

MX529
Posts
76
Joined
3/26/2024
Location
Wilmington, NC, USA
4/11/2024 8:55am
Sandusky26 wrote:

I might have more laps on that track than anyone in history.

MX529 wrote:
Funny! Never see you out there?     won many night races on that track.. great under race conditions, otherwise not so much..only went cause JWTF...

Funny! Never see you out there?  
 

won many night races on that track.. great under race conditions, otherwise not so much..only went cause JWTF was closed for SEMA race weekend 

Sandusky26 wrote:
I posted about it in another thread. Last summer a kid crashed in my moto and they spent the whole race looking for the red flag...

I posted about it in another thread. Last summer a kid crashed in my moto and they spent the whole race looking for the red flag, that was the last time I raced there.

Was there…

that was a D class race wasn’t it? Was it the one the kid broke his femur after he went totally side ways after finish line double whiskey throttled into a get off? 

one race one kid went into violent get off into the trees on second straight away

not a big fan of the outlaw racing.. rather stick to NC AMA races

Quote

Sandusky26
Posts
3460
Joined
7/28/2021
Location
Eastern, NC, USA
4/11/2024 9:09am
MX529 wrote:
Funny! Never see you out there?     won many night races on that track.. great under race conditions, otherwise not so much..only went cause JWTF...

Funny! Never see you out there?  
 

won many night races on that track.. great under race conditions, otherwise not so much..only went cause JWTF was closed for SEMA race weekend 

Sandusky26 wrote:
I posted about it in another thread. Last summer a kid crashed in my moto and they spent the whole race looking for the red flag...

I posted about it in another thread. Last summer a kid crashed in my moto and they spent the whole race looking for the red flag, that was the last time I raced there.

MX529 wrote:
Was there… that was a D class race wasn’t it? Was it the one the kid broke his femur after he went totally side ways after...

Was there…

that was a D class race wasn’t it? Was it the one the kid broke his femur after he went totally side ways after finish line double whiskey throttled into a get off? 

one race one kid went into violent get off into the trees on second straight away

not a big fan of the outlaw racing.. rather stick to NC AMA races

Quote

I'm thinking he was in C class, I was in 450 expert..

I agree with your last sentence.

MX529
Posts
76
Joined
3/26/2024
Location
Wilmington, NC, USA
4/11/2024 9:25am
Sandusky26 wrote:
I posted about it in another thread. Last summer a kid crashed in my moto and they spent the whole race looking for the red flag...

I posted about it in another thread. Last summer a kid crashed in my moto and they spent the whole race looking for the red flag, that was the last time I raced there.

MX529 wrote:
Was there… that was a D class race wasn’t it? Was it the one the kid broke his femur after he went totally side ways after...

Was there…

that was a D class race wasn’t it? Was it the one the kid broke his femur after he went totally side ways after finish line double whiskey throttled into a get off? 

one race one kid went into violent get off into the trees on second straight away

not a big fan of the outlaw racing.. rather stick to NC AMA races

Quote

Sandusky26 wrote:

I'm thinking he was in C class, I was in 450 expert..

I agree with your last sentence.

What’s your race number # ?

Sandusky26
Posts
3460
Joined
7/28/2021
Location
Eastern, NC, USA
4/11/2024 9:30am
MX529 wrote:
Was there… that was a D class race wasn’t it? Was it the one the kid broke his femur after he went totally side ways after...

Was there…

that was a D class race wasn’t it? Was it the one the kid broke his femur after he went totally side ways after finish line double whiskey throttled into a get off? 

one race one kid went into violent get off into the trees on second straight away

not a big fan of the outlaw racing.. rather stick to NC AMA races

Quote

Sandusky26 wrote:

I'm thinking he was in C class, I was in 450 expert..

I agree with your last sentence.

MX529 wrote:

What’s your race number # ?

26

Moto520
Posts
3643
Joined
2/4/2013
Location
Schaumburg, IL, USA
4/11/2024 9:49am
Sandusky26 wrote:

I'm thinking he was in C class, I was in 450 expert..

I agree with your last sentence.

MX529 wrote:

What’s your race number # ?

Sandusky26 wrote:

26

Did we just witness you two becoming best friends?

10
Markee
Posts
3665
Joined
4/15/2013
Location
Suffolk, VA, USA
4/11/2024 10:05am
Markee wrote:
Spring rates are a little confusing on this bike. Race Tech has me 5 rates off of stock (lighter). I'm 175lbs VET / A-B So this...

Spring rates are a little confusing on this bike. Race Tech has me 5 rates off of stock (lighter). I'm 175lbs VET / A-B So this thing is sprung for a 200lb intermediate rider?

What spring rates did your tuners or yourself end up with based off your speed and weight??

Sandusky26 wrote:

Total Control suspension dialed me in with.52's (2 spring rates up from stock) and 380cc's of oil. I'm 170 and my stuff is super plush.

Did the race tech calculator again @175 lbs. Has me at .48 Front and 5.4 Rear. To match up to the stock spring rates on RT calculator, you need to be 210lbs Front and 185lbs Rear.

Wonder if the RT calculator is running off the 23 weight bias. The 24 supposed to have more forward weight bias correct?

Was thinking of sending mine to Chad at Total Control, but first wanted to do break in and run stock to see if a revalve was even necessary.  Put in keefers clicker settings and set the sag at 105. Has a a little stink bug feel.

4/11/2024 1:42pm
Markee wrote:
Spring rates are a little confusing on this bike. Race Tech has me 5 rates off of stock (lighter). I'm 175lbs VET / A-B So this...

Spring rates are a little confusing on this bike. Race Tech has me 5 rates off of stock (lighter). I'm 175lbs VET / A-B So this thing is sprung for a 200lb intermediate rider?

What spring rates did your tuners or yourself end up with based off your speed and weight??

Sandusky26 wrote:

Total Control suspension dialed me in with.52's (2 spring rates up from stock) and 380cc's of oil. I'm 170 and my stuff is super plush.

Markee wrote:
Did the race tech calculator again @175 lbs. Has me at .48 Front and 5.4 Rear. To match up to the stock spring rates on RT...

Did the race tech calculator again @175 lbs. Has me at .48 Front and 5.4 Rear. To match up to the stock spring rates on RT calculator, you need to be 210lbs Front and 185lbs Rear.

Wonder if the RT calculator is running off the 23 weight bias. The 24 supposed to have more forward weight bias correct?

Was thinking of sending mine to Chad at Total Control, but first wanted to do break in and run stock to see if a revalve was even necessary.  Put in keefers clicker settings and set the sag at 105. Has a a little stink bug feel.

If you’re really racing A class like you stated earlier, I bet the stock springs are going to be pretty darn close.  Weight wise, you’re right about where they set the bikes up for stock.  What is the suspension doing wrong for you that you are trying to fix?

MX529
Posts
76
Joined
3/26/2024
Location
Wilmington, NC, USA
4/11/2024 4:07pm

Factory Connection all last year had me at .51 spring and 355 CC of oil set at 175 pound rider.. it was super plush specially in deep chop 

2
Smith246
Posts
436
Joined
1/21/2024
Location
Jerramungup, WA, AU
4/11/2024 11:51pm
MX529 wrote:
Factory Connection all last year had me at .51 spring and 355 CC of oil set at 175 pound rider.. it was super plush specially in...

Factory Connection all last year had me at .51 spring and 355 CC of oil set at 175 pound rider.. it was super plush specially in deep chop 

Did they revalve aswell? Do you know if they went firmer or softer? Love my 24 just struggling a bit with comfort on small chop, big hits are no worries. 

MX529
Posts
76
Joined
3/26/2024
Location
Wilmington, NC, USA
4/12/2024 5:04am
MX529 wrote:
Factory Connection all last year had me at .51 spring and 355 CC of oil set at 175 pound rider.. it was super plush specially in...

Factory Connection all last year had me at .51 spring and 355 CC of oil set at 175 pound rider.. it was super plush specially in deep chop 

Smith246 wrote:
Did they revalve aswell? Do you know if they went firmer or softer? Love my 24 just struggling a bit with comfort on small chop, big...

Did they revalve aswell? Do you know if they went firmer or softer? Love my 24 just struggling a bit with comfort on small chop, big hits are no worries. 

Total revalve for Vet A/B rider using all Showa internals 

the initial ride is much stiffer versus stock.. once up to race speed it feels very plush 

Smith246
Posts
436
Joined
1/21/2024
Location
Jerramungup, WA, AU
4/12/2024 5:53am
MX529 wrote:
Factory Connection all last year had me at .51 spring and 355 CC of oil set at 175 pound rider.. it was super plush specially in...

Factory Connection all last year had me at .51 spring and 355 CC of oil set at 175 pound rider.. it was super plush specially in deep chop 

Smith246 wrote:
Did they revalve aswell? Do you know if they went firmer or softer? Love my 24 just struggling a bit with comfort on small chop, big...

Did they revalve aswell? Do you know if they went firmer or softer? Love my 24 just struggling a bit with comfort on small chop, big hits are no worries. 

MX529 wrote:
Total revalve for Vet A/B rider using all Showa internals  the initial ride is much stiffer versus stock.. once up to race speed it feels very...

Total revalve for Vet A/B rider using all Showa internals 

the initial ride is much stiffer versus stock.. once up to race speed it feels very plush 

Thanks, think I'm just too unfit to ride at race pace long enough ha ha.

MX529
Posts
76
Joined
3/26/2024
Location
Wilmington, NC, USA
4/12/2024 6:18am
Smith246 wrote:
Did they revalve aswell? Do you know if they went firmer or softer? Love my 24 just struggling a bit with comfort on small chop, big...

Did they revalve aswell? Do you know if they went firmer or softer? Love my 24 just struggling a bit with comfort on small chop, big hits are no worries. 

MX529 wrote:
Total revalve for Vet A/B rider using all Showa internals  the initial ride is much stiffer versus stock.. once up to race speed it feels very...

Total revalve for Vet A/B rider using all Showa internals 

the initial ride is much stiffer versus stock.. once up to race speed it feels very plush 

Smith246 wrote:

Thanks, think I'm just too unfit to ride at race pace long enough ha ha.

The suspension revalve would make you less tired.. 

Smith246
Posts
436
Joined
1/21/2024
Location
Jerramungup, WA, AU
4/12/2024 6:41am
MX529 wrote:
Total revalve for Vet A/B rider using all Showa internals  the initial ride is much stiffer versus stock.. once up to race speed it feels very...

Total revalve for Vet A/B rider using all Showa internals 

the initial ride is much stiffer versus stock.. once up to race speed it feels very plush 

Smith246 wrote:

Thanks, think I'm just too unfit to ride at race pace long enough ha ha.

MX529 wrote:

The suspension revalve would make you less tired.. 

Yeah i have had a revalve. They went slightly softer on the valving to try and get some comfort but then went up in spring rate and more oil for better hold up. I find it hard to believe it is too soft in the valving when it is harsh on small bumps but good on big hits.

1
Andy7
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2/24/2017
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Venado Tuerto, Santa Fe, AR
Fantasy
4/12/2024 6:49am
jophis_37 wrote:

Screenshot 20240203 191106 Microsoft 365 %28Office%29.jpg?VersionId=iH7YtFXMxgm 87riSboZ

Does anyone have the full recall document, and can share it please? Thanks

Brosho
Posts
481
Joined
1/31/2011
Location
Los Angeles, CA, USA
4/12/2024 10:46am

Do you guys know if any company has made a full skid plate for the 24 KX450 that is not metal? If so who?

1
Factoryphoto
Posts
851
Joined
4/1/2008
Location
Northern California, CA, USA
4/12/2024 11:01am
Brosho wrote:

Do you guys know if any company has made a full skid plate for the 24 KX450 that is not metal? If so who?

Yes , p3 carbon makes them, little pricey but good coverage. I got the standard one and uses 4 bolts that screw into existing holes. 

https://p3carbon.com/collections/kawasaki-skid-plates/products/p3-carbo…

1
racinstation
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5/18/2013
Location
Driggs, ID, USA
4/12/2024 11:13am
Brosho wrote:

Do you guys know if any company has made a full skid plate for the 24 KX450 that is not metal? If so who?

P3.  One covers the linkage and one does not.  I opted for the non-linkage version.....they are solid.     Acerbis is coming soon.

1
Brosho
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481
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1/31/2011
Location
Los Angeles, CA, USA
4/12/2024 11:19am

Thanks Guys

avidchimp
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7/9/2008
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EGL, MN, USA
4/12/2024 11:21am
Brosho wrote:

Thanks Guys

Hi Craig!

1
4/12/2024 4:30pm
Brosho wrote:

Do you guys know if any company has made a full skid plate for the 24 KX450 that is not metal? If so who?

The TM Designworks full coverage skid plate from my 2019 fit.

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