2024 Kawasaki KX450 and KX450X

MX529
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76
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Wilmington , NC US
MX529 6/12/2024 10:39am
6/12/2024 10:39am
tylerp319 wrote:
Here’s one….. bought a brand new pc t-6 full system. The header wouldn’t go into the engine hole. Tried it about 15 times. No matter what...

Here’s one….. bought a brand new pc t-6 full system. The header wouldn’t go into the engine hole. Tried it about 15 times. No matter what it wouldn’t work. Anyone have any issue with this? I called pc and they said they’ve never heard of anyone having this issue. Figured I’d ask. Thanks! 

MX529 wrote:
How is this possible?  Other then maybe you ordered the wrong year model?? dunno? The new PC 6 exhaust pipe flange is rectangular shaped not round...

How is this possible?  Other then maybe you ordered the wrong year model??

dunno? The new PC 6 exhaust pipe flange is rectangular shaped not round like previous model yrs 

you also have to turn the pipe at an angle to get it to align properly before seating it to the head

took about 10 minutes to install 

 

 

tylerp319 wrote:
It was the correct exhaust and i tried everything possible it wouldn’t line up and was hitting the frame to prevent it from seating properly. Either...

It was the correct exhaust and i tried everything possible it wouldn’t line up and was hitting the frame to prevent it from seating properly. Either it was bent from shipping or a mishap from factory. I have another one en route. 👍🏼

That’s why dry fitting anything mechanical is so important before bolting it completely down 

can I ask who you purchased this from..? 

lumpy790
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York, SC US
lumpy790 6/12/2024 10:50am
6/12/2024 10:50am
MX529 wrote:
How is this possible?  Other then maybe you ordered the wrong year model?? dunno? The new PC 6 exhaust pipe flange is rectangular shaped not round...

How is this possible?  Other then maybe you ordered the wrong year model??

dunno? The new PC 6 exhaust pipe flange is rectangular shaped not round like previous model yrs 

you also have to turn the pipe at an angle to get it to align properly before seating it to the head

took about 10 minutes to install 

 

 

tylerp319 wrote:
It was the correct exhaust and i tried everything possible it wouldn’t line up and was hitting the frame to prevent it from seating properly. Either...

It was the correct exhaust and i tried everything possible it wouldn’t line up and was hitting the frame to prevent it from seating properly. Either it was bent from shipping or a mishap from factory. I have another one en route. 👍🏼

MX529 wrote:

That’s why dry fitting anything mechanical is so important before bolting it completely down 

can I ask who you purchased this from..? 

Agreed everything stays loose and with springs aligning it shake it around a little to let everything self align then stating from the head start tightening towards the end.

tylerp319
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5/2/2019
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Lawton, OK US
tylerp319 6/12/2024 12:07pm
6/12/2024 12:07pm
MX529 wrote:
How is this possible?  Other then maybe you ordered the wrong year model?? dunno? The new PC 6 exhaust pipe flange is rectangular shaped not round...

How is this possible?  Other then maybe you ordered the wrong year model??

dunno? The new PC 6 exhaust pipe flange is rectangular shaped not round like previous model yrs 

you also have to turn the pipe at an angle to get it to align properly before seating it to the head

took about 10 minutes to install 

 

 

tylerp319 wrote:
It was the correct exhaust and i tried everything possible it wouldn’t line up and was hitting the frame to prevent it from seating properly. Either...

It was the correct exhaust and i tried everything possible it wouldn’t line up and was hitting the frame to prevent it from seating properly. Either it was bent from shipping or a mishap from factory. I have another one en route. 👍🏼

MX529 wrote:

That’s why dry fitting anything mechanical is so important before bolting it completely down 

can I ask who you purchased this from..? 

Motosport. Yeah I matched the end of the header up w the stock and it was noticeably different shape and even thickness. Pretty crazy situation. I have a new one coming so hopefully it was a freak accident. 

NicNak
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999
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Palm Desert, CA US
NicNak 6/12/2024 12:32pm
6/12/2024 12:32pm
quadmx301 wrote:
Ride report - PC T-6 Full System, Twin Air Powerflow Kit, cut Airbox, drilled side panel, 50/50 pump/race gas, CHA24 map on a lightly touched up...

Ride report - PC T-6 Full System, Twin Air Powerflow Kit, cut Airbox, drilled side panel, 50/50 pump/race gas, CHA24 map on a lightly touched up ECU (buddy adjusted the AFR on a dyno). Stock gearing, 116 link chain. 

Barks more off the bottom liked I’ve wanted it to from the beginning, but still hooks up. The connected feel from the throttle to the rear wheel is awesome. Linear pull all the way to overrev. Can ride a gear high or a gear low and rev it. Still doesn’t want to get away from you though, I have no apparent fears of whiskying the bike when tired. Could probably make it faster yet, but I think it’s near perfect as is. This setup is the perfect vet 450 motor. Going to look at buying some clamps in the next few months, have a few buddies who bought some and are loving them. This things is so great! One happy owner here.

 

What clamps are your buddies running that they like?

The Shop

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LouisianaMotocross 6/12/2024 4:29pm
6/12/2024 4:29pm

Put fmf slip on today and bad bog at full Throttle. I know some bikes have to reset so to speak by idling and then turn off, exc. Anyone know if that’s the case with our bikes? I removed it and put stock back on and no problems. Only thing done to bike is rubber grommet removed. 

1
NicNak
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Palm Desert, CA US
NicNak 6/12/2024 6:14pm
6/12/2024 6:14pm
LouisianaMotocross wrote:
Put fmf slip on today and bad bog at full Throttle. I know some bikes have to reset so to speak by idling and then turn...

Put fmf slip on today and bad bog at full Throttle. I know some bikes have to reset so to speak by idling and then turn off, exc. Anyone know if that’s the case with our bikes? I removed it and put stock back on and no problems. Only thing done to bike is rubber grommet removed. 

That’s odd! My fmf slip on doesn’t bog ! I also have a twin air flow kit as well. 

LouisianaMotocross 6/12/2024 6:28pm
6/12/2024 6:28pm
LouisianaMotocross wrote:
Put fmf slip on today and bad bog at full Throttle. I know some bikes have to reset so to speak by idling and then turn...

Put fmf slip on today and bad bog at full Throttle. I know some bikes have to reset so to speak by idling and then turn off, exc. Anyone know if that’s the case with our bikes? I removed it and put stock back on and no problems. Only thing done to bike is rubber grommet removed. 

NicNak wrote:

That’s odd! My fmf slip on doesn’t bog ! I also have a twin air flow kit as well. 

I thought so too. 

NicNak
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Palm Desert, CA US
NicNak 6/12/2024 6:31pm
6/12/2024 6:31pm
LouisianaMotocross wrote:

I thought so too. 

Did you call fmf? 

1
quadmx301
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Murrieta, CA US
quadmx301 6/12/2024 9:43pm
6/12/2024 9:43pm Edited Date/Time 6/12/2024 9:43pm
quadmx301 wrote:
Ride report - PC T-6 Full System, Twin Air Powerflow Kit, cut Airbox, drilled side panel, 50/50 pump/race gas, CHA24 map on a lightly touched up...

Ride report - PC T-6 Full System, Twin Air Powerflow Kit, cut Airbox, drilled side panel, 50/50 pump/race gas, CHA24 map on a lightly touched up ECU (buddy adjusted the AFR on a dyno). Stock gearing, 116 link chain. 

Barks more off the bottom liked I’ve wanted it to from the beginning, but still hooks up. The connected feel from the throttle to the rear wheel is awesome. Linear pull all the way to overrev. Can ride a gear high or a gear low and rev it. Still doesn’t want to get away from you though, I have no apparent fears of whiskying the bike when tired. Could probably make it faster yet, but I think it’s near perfect as is. This setup is the perfect vet 450 motor. Going to look at buying some clamps in the next few months, have a few buddies who bought some and are loving them. This things is so great! One happy owner here.

 

NicNak wrote:

What clamps are your buddies running that they like?

One has the PC clamps, the other X-Trigs. Have yet to ride either. Bike seems to like a stiff clamp though. 

1
JezCross
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6/12/2024
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Rosbery, NSW AU
JezCross 6/12/2024 11:30pm
6/12/2024 11:30pm

Anyone else had luck with mapping or fuel controllers on the '24? Curious to hear some experiences there. I'm debating picking up a get ECU or just sticking with the CHA tune for now. This bike is so potent from the factory.

rpm.15
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58
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12/26/2018
Location
Wenatchee, WA US
rpm.15 6/13/2024 7:14am
6/13/2024 7:14am
LouisianaMotocross wrote:
Put fmf slip on today and bad bog at full Throttle. I know some bikes have to reset so to speak by idling and then turn...

Put fmf slip on today and bad bog at full Throttle. I know some bikes have to reset so to speak by idling and then turn off, exc. Anyone know if that’s the case with our bikes? I removed it and put stock back on and no problems. Only thing done to bike is rubber grommet removed. 

I got the FMF 4.1 slip on and Twin air kit. No bog. I also run the spark arrestor. Bikes been really good. 

LouisianaMotocross 6/13/2024 7:36am
6/13/2024 7:36am
LouisianaMotocross wrote:
Put fmf slip on today and bad bog at full Throttle. I know some bikes have to reset so to speak by idling and then turn...

Put fmf slip on today and bad bog at full Throttle. I know some bikes have to reset so to speak by idling and then turn off, exc. Anyone know if that’s the case with our bikes? I removed it and put stock back on and no problems. Only thing done to bike is rubber grommet removed. 

rpm.15 wrote:

I got the FMF 4.1 slip on and Twin air kit. No bog. I also run the spark arrestor. Bikes been really good. 

Does it have a whistle to it? Mine had a bad whistle as well. I’m wondering if it didn’t make a good seal with the header. 

NicNak
Profile picture for user NicNak
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999
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Location
Palm Desert, CA US
NicNak 6/13/2024 9:36am
6/13/2024 9:36am
quadmx301 wrote:
Ride report - PC T-6 Full System, Twin Air Powerflow Kit, cut Airbox, drilled side panel, 50/50 pump/race gas, CHA24 map on a lightly touched up...

Ride report - PC T-6 Full System, Twin Air Powerflow Kit, cut Airbox, drilled side panel, 50/50 pump/race gas, CHA24 map on a lightly touched up ECU (buddy adjusted the AFR on a dyno). Stock gearing, 116 link chain. 

Barks more off the bottom liked I’ve wanted it to from the beginning, but still hooks up. The connected feel from the throttle to the rear wheel is awesome. Linear pull all the way to overrev. Can ride a gear high or a gear low and rev it. Still doesn’t want to get away from you though, I have no apparent fears of whiskying the bike when tired. Could probably make it faster yet, but I think it’s near perfect as is. This setup is the perfect vet 450 motor. Going to look at buying some clamps in the next few months, have a few buddies who bought some and are loving them. This things is so great! One happy owner here.

 

NicNak wrote:

What clamps are your buddies running that they like?

quadmx301 wrote:

One has the PC clamps, the other X-Trigs. Have yet to ride either. Bike seems to like a stiff clamp though. 

nice! I rode my 24 once with the stock clamps but i just put the x trigs on so i'll report back. I ran x trigs on my older gen bike also so i'm hopeful they will be solid. I'm pretty used to them. 

1
Fouled Plug 6/13/2024 9:55am
6/13/2024 9:55am
LouisianaMotocross wrote:
Put fmf slip on today and bad bog at full Throttle. I know some bikes have to reset so to speak by idling and then turn...

Put fmf slip on today and bad bog at full Throttle. I know some bikes have to reset so to speak by idling and then turn off, exc. Anyone know if that’s the case with our bikes? I removed it and put stock back on and no problems. Only thing done to bike is rubber grommet removed. 

rpm.15 wrote:

I got the FMF 4.1 slip on and Twin air kit. No bog. I also run the spark arrestor. Bikes been really good. 

LouisianaMotocross wrote:

Does it have a whistle to it? Mine had a bad whistle as well. I’m wondering if it didn’t make a good seal with the header. 

I would do as NicNak suggested. Go to the source, FMF should be able to point you in the right direction on this issue.

hubbardmx50
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11/17/2016
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Rancho Cucamonga, CA US
hubbardmx50 6/13/2024 2:47pm
6/13/2024 2:47pm

Still mind boggling to me how bad Kawi dropped the ball with the airbox/airfilter on this bike. 

1
quadmx301
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505
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Murrieta, CA US
quadmx301 6/13/2024 2:55pm
6/13/2024 2:55pm
NicNak wrote:

What clamps are your buddies running that they like?

quadmx301 wrote:

One has the PC clamps, the other X-Trigs. Have yet to ride either. Bike seems to like a stiff clamp though. 

NicNak wrote:
nice! I rode my 24 once with the stock clamps but i just put the x trigs on so i'll report back. I ran x trigs...

nice! I rode my 24 once with the stock clamps but i just put the x trigs on so i'll report back. I ran x trigs on my older gen bike also so i'm hopeful they will be solid. I'm pretty used to them. 

Please do! I just ordered some. Haven’t ridden aftermarket clamps since my ‘08 Honda, looking forward to them

quadzrulebro 6/13/2024 3:58pm
6/13/2024 3:58pm
hubbardmx50 wrote:

Still mind boggling to me how bad Kawi dropped the ball with the airbox/airfilter on this bike. 

You can blame that and the exhaust baffle on the 2025 FIM sound regulations.  A reduction from 115 to 112db is a massive drop in sound energy.  It will be interesting to see how the other OEMs accomplish this.  That is why the thing becomes a rocket with the addition of a slip on and opening up the airbox.

4

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lumpy790
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York, SC US
lumpy790 6/13/2024 4:22pm
6/13/2024 4:22pm
hubbardmx50 wrote:

Still mind boggling to me how bad Kawi dropped the ball with the airbox/airfilter on this bike. 

quadzrulebro wrote:
You can blame that and the exhaust baffle on the 2025 FIM sound regulations.  A reduction from 115 to 112db is a massive drop in sound...

You can blame that and the exhaust baffle on the 2025 FIM sound regulations.  A reduction from 115 to 112db is a massive drop in sound energy.  It will be interesting to see how the other OEMs accomplish this.  That is why the thing becomes a rocket with the addition of a slip on and opening up the airbox.

Replacing the stock muffler with Dr D muffler on my 08 YZ450F made a huge difference too.

1
280driver
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VA US
280driver 6/13/2024 4:30pm
6/13/2024 4:30pm
hubbardmx50 wrote:

Still mind boggling to me how bad Kawi dropped the ball with the airbox/airfilter on this bike. 

quadzrulebro wrote:
You can blame that and the exhaust baffle on the 2025 FIM sound regulations.  A reduction from 115 to 112db is a massive drop in sound...

You can blame that and the exhaust baffle on the 2025 FIM sound regulations.  A reduction from 115 to 112db is a massive drop in sound energy.  It will be interesting to see how the other OEMs accomplish this.  That is why the thing becomes a rocket with the addition of a slip on and opening up the airbox.

The ‘25 KTM’s, RM-Z’s and CRFs have been released.  I’ve not heard nothing about restricted mufflers yet.

Duke28
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12/18/2019
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Moto town, TX US
Duke28 6/13/2024 4:53pm
6/13/2024 4:53pm

Just picked up a 24 450x for 7k out the door. Hoping it was the right move for east coast off road. 
What is everyone running for skidplate/guideplate protection? 

2
707motoman
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Petaluma, CA US
707motoman 6/13/2024 5:32pm
6/13/2024 5:32pm
Duke28 wrote:
Just picked up a 24 450x for 7k out the door. Hoping it was the right move for east coast off road.  What is everyone running...

Just picked up a 24 450x for 7k out the door. Hoping it was the right move for east coast off road. 
What is everyone running for skidplate/guideplate protection? 

Doesn’t seem like much is available. I’m running the oem one off the 2023 450f

rpm.15
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58
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12/26/2018
Location
Wenatchee, WA US
rpm.15 6/13/2024 5:34pm
6/13/2024 5:34pm
LouisianaMotocross wrote:
Put fmf slip on today and bad bog at full Throttle. I know some bikes have to reset so to speak by idling and then turn...

Put fmf slip on today and bad bog at full Throttle. I know some bikes have to reset so to speak by idling and then turn off, exc. Anyone know if that’s the case with our bikes? I removed it and put stock back on and no problems. Only thing done to bike is rubber grommet removed. 

rpm.15 wrote:

I got the FMF 4.1 slip on and Twin air kit. No bog. I also run the spark arrestor. Bikes been really good. 

LouisianaMotocross wrote:

Does it have a whistle to it? Mine had a bad whistle as well. I’m wondering if it didn’t make a good seal with the header. 

No whistle, sounds like it should. 

quadzrulebro 6/13/2024 5:39pm
6/13/2024 5:39pm
Duke28 wrote:
Just picked up a 24 450x for 7k out the door. Hoping it was the right move for east coast off road.  What is everyone running...

Just picked up a 24 450x for 7k out the door. Hoping it was the right move for east coast off road. 
What is everyone running for skidplate/guideplate protection? 

I have a TM Designworks Extreme Protection Glide plate on mine.  I think high density plastic is the same thing they make rock-crawler skid plates out of.  It is bulletproof and slides across rocks and obstacles really smoothly.

LouisianaMotocross 6/13/2024 7:17pm
6/13/2024 7:17pm
rpm.15 wrote:

I got the FMF 4.1 slip on and Twin air kit. No bog. I also run the spark arrestor. Bikes been really good. 

LouisianaMotocross wrote:

Does it have a whistle to it? Mine had a bad whistle as well. I’m wondering if it didn’t make a good seal with the header. 

rpm.15 wrote:

No whistle, sounds like it should. 

It was user error on my part it appears. Working fine today. Fmf mentioned something and it was exactly what they thought. 

2
crc245
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Yorba Linda, CA US
crc245 6/13/2024 7:31pm
6/13/2024 7:31pm
Duke28 wrote:
Just picked up a 24 450x for 7k out the door. Hoping it was the right move for east coast off road.  What is everyone running...

Just picked up a 24 450x for 7k out the door. Hoping it was the right move for east coast off road. 
What is everyone running for skidplate/guideplate protection? 

707motoman wrote:

Doesn’t seem like much is available. I’m running the oem one off the 2023 450f

CMT, P3, Works Connection, TM Designworks, Acerbis, etc. all have 24’ KX450/450X plates of various style available, sure I’m missing a couple other manufacturers as well!

 

Most factory: https://www.compositemanufacturingtechnologies.com/store/p22/2024_Kawas…

quiknic
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Santa Clarita, CA US
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quiknic 6/13/2024 10:44pm
6/13/2024 10:44pm
Duke28 wrote:
Just picked up a 24 450x for 7k out the door. Hoping it was the right move for east coast off road.  What is everyone running...

Just picked up a 24 450x for 7k out the door. Hoping it was the right move for east coast off road. 
What is everyone running for skidplate/guideplate protection? 

I just picked up the P3 Carbon Skid Plate KX450/450X with Integrated Linkage Guard. Not cheap but it fits great and for off-road this on has the linkage guard. They offer one with and another without the linkage guard.

Pictures from the P3 website (not my bike) Link below:

24 KX450 P3 Carbon 000124 KX450 P3 Carbon 000224 KX450 P3 Carbon 0003

https://p3carbon.com/products/p3-carbon-skid-plate-kawasaki-kx450-2024_with-integrated-linkage-guard?rq=mk_kawasaki~md_kx-450~yr_2024&variant=43840890732697

3
everlong70 6/13/2024 11:50pm
6/13/2024 11:50pm

Acerbis UK showing these. Hopefully available everywhere else soon. (Australia here)

2
motomike894
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Waterloo, IN US
motomike894 6/14/2024 5:34am
6/14/2024 5:34am

Has anyone done a vortex ecu with the stock pipe ? 

I have done the stock muffler mods, filter cage, cut our airbox, side plate holes, chavez map, have been going back and forth between 50-52 rear sprockets, but I still am wanting / needing little more out of the gate. 

I can get a pipe cheaper then a vortex, but if going to do one or the other want to do the best one first lol. 

1
Fouled Plug 6/14/2024 5:39am
6/14/2024 5:39am
everlong70 wrote:
Acerbis UK showing these. Hopefully available everywhere else soon. (Australia here)

Acerbis UK showing these. Hopefully available everywhere else soon. (Australia here)

Here is the link if anyone is interested. Looks like it's going to be a nice affordable option.  https://www.acerbis.com/eu/motorsport/plastics/engine-protection/skid-p…

 

1

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