2024 Kawasaki KX450 and KX450X

LouisianaMotocross wrote:

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

NicNak wrote:

Hey man just curious what the issue was? I just bolted up a vortex & put my spark arrestor in & started it up to make...

Hey man just curious what the issue was? I just bolted up a vortex & put my spark arrestor in & started it up to make sure it runs. Seems it kinda bogs out if I snap throttle full bore but I rode the bike down the road & seemed fine so the road..I didn’t crack throttle wide open down the road. When the bike warmed up it was way better. I am optimistic that if I get it good & warm it’ll be solid but wondering what fmf said just in case. You can text me at (309) 258-4671 ! My name is Nick 

LouisianaMotocross wrote:

I was getting bad air quality from where I was starting the bike up at. 

denis26 wrote:

besides works connection does anyone know of any manufacturers of radiator reinforcements for this bike?

Tannermoto414 wrote:

I’ve never owned a Kawi pretty and my last two bikes where Both 2014 yz250’s one for moto one for off-road and the 450FX is really...

I’ve never owned a Kawi pretty and my last two bikes where Both 2014 yz250’s one for moto one for off-road and the 450FX is really peaking my interest since I no longer ride moto. Should I pick that over going with Yamaha again? 

Travis_Hudson wrote:

Joined the club, love the bike, but on my second ride the forks stuck. Loosened all the pinch bolts, but she is stuck. Anyone ever seen...

Joined the club, love the bike, but on my second ride the forks stuck. Loosened all the pinch bolts, but she is stuck. Anyone ever seen this happen?

LouisianaMotocross wrote:

I’ve seen it happen on a Honda in person. Unfortunately I don’t know what the diagnosis ended up being but I’ve definitely seen it. 

denis26 wrote:

besides works connection does anyone know of any manufacturers of radiator reinforcements for this bike?

Sandusky26 wrote:

I'm using Devol.

49weasel wrote:

Installed the optional Kawasaki engine mounts today.   Pretty noticeable difference. Front felt more planted and bit less harsh feeling in my hands.  

49weasel wrote:

Installed the optional Kawasaki engine mounts today.   Pretty noticeable difference. Front felt more planted and bit less harsh feeling in my hands.  

retro2 wrote:

How and where the hell did you get ahold of those 

motomike894 wrote:

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...

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. 

707motoman wrote:

I’ve got your same set up. I’m getting my Vortex tomorrow and will ride on Sunday. I’ll give you a report 

motomike894 wrote:

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...

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. 

707motoman wrote:

I’ve got your same set up. I’m getting my Vortex tomorrow and will ride on Sunday. I’ll give you a report 

motomike894 wrote:

Any update on how she performed ? 

Ed_C29 wrote:

I originally put a full pro circuit exhaust, airbox holes/removed plug & 51 tooth rear sprocket on and thought the bike was decent.    Now I...

I originally put a full pro circuit exhaust, airbox holes/removed plug & 51 tooth rear sprocket on and thought the bike was decent. 
 

Now I added a Tokyo mods tuned vortex, running the max power tune & it’s amazing! Just what I wanted. Coming off Yamaha’s and Honda’s I was looking for more excitement and it delivered. 

MXer391 wrote:

I may have missed it in here but has anyone went from a 350 to the '24 KX 450 and regretted it? Thinking I'm gonna have...

I may have missed it in here but has anyone went from a 350 to the '24 KX 450 and regretted it? Thinking I'm gonna have to pull the trigger soon, they are selling out in my neck of the woods. 

MXer391 wrote:

I may have missed it in here but has anyone went from a 350 to the '24 KX 450 and regretted it? Thinking I'm gonna have...

I may have missed it in here but has anyone went from a 350 to the '24 KX 450 and regretted it? Thinking I'm gonna have to pull the trigger soon, they are selling out in my neck of the woods. 

MXer391 wrote:

I may have missed it in here but has anyone went from a 350 to the '24 KX 450 and regretted it? Thinking I'm gonna have...

I may have missed it in here but has anyone went from a 350 to the '24 KX 450 and regretted it? Thinking I'm gonna have to pull the trigger soon, they are selling out in my neck of the woods. 

Smith246 wrote:

I have a 23 350sxf and a 24 kx450 and while I definitely don't regret the kx450 i don't think I'll be keeping it. It depends...

I have a 23 350sxf and a 24 kx450 and while I definitely don't regret the kx450 i don't think I'll be keeping it. It depends what sort of rider you are and what you ride but for doing pure moto the 350 is still more fun, safer and faster over long rough motos for me. I will say the 24 kx450 is definitely the best "450" I've ever ridden.

MXer391 wrote:

I may have missed it in here but has anyone went from a 350 to the '24 KX 450 and regretted it? Thinking I'm gonna have...

I may have missed it in here but has anyone went from a 350 to the '24 KX 450 and regretted it? Thinking I'm gonna have to pull the trigger soon, they are selling out in my neck of the woods. 

rpm.15 wrote:

I did. Don't regret it for a minute. I like my 24 KX 450 much better than the 23 350 sx. I'm a bigger rider 6'1"...

I did. Don't regret it for a minute. I like my 24 KX 450 much better than the 23 350 sx. I'm a bigger rider 6'1" 235 pounds. KX has the torque I need yet doesn't scare me like the new YZ 450F.  KX super smooth power, stable bike, that turns well. At least for me anyways. 

rpm.15 wrote:

I did. Don't regret it for a minute. I like my 24 KX 450 much better than the 23 350 sx. I'm a bigger rider 6'1"...

I did. Don't regret it for a minute. I like my 24 KX 450 much better than the 23 350 sx. I'm a bigger rider 6'1" 235 pounds. KX has the torque I need yet doesn't scare me like the new YZ 450F.  KX super smooth power, stable bike, that turns well. At least for me anyways. 

Smith246 wrote:

How many hrs have you got on your 450? For the first 20 or so hrs I liked my kx450 better than the 350 but now...

How many hrs have you got on your 450? For the first 20 or so hrs I liked my kx450 better than the 350 but now im starting to get bored with the heavy feeling slow revving nature of the kx powerband. The new 350 on the other hand is alot snappier fast revving fun style of power. Again I think alot of it comes back to what rider and what sort of riding you do.

rpm.15 wrote:

I did. Don't regret it for a minute. I like my 24 KX 450 much better than the 23 350 sx. I'm a bigger rider 6'1"...

I did. Don't regret it for a minute. I like my 24 KX 450 much better than the 23 350 sx. I'm a bigger rider 6'1" 235 pounds. KX has the torque I need yet doesn't scare me like the new YZ 450F.  KX super smooth power, stable bike, that turns well. At least for me anyways. 

Smith246 wrote:

How many hrs have you got on your 450? For the first 20 or so hrs I liked my kx450 better than the 350 but now...

How many hrs have you got on your 450? For the first 20 or so hrs I liked my kx450 better than the 350 but now im starting to get bored with the heavy feeling slow revving nature of the kx powerband. The new 350 on the other hand is alot snappier fast revving fun style of power. Again I think alot of it comes back to what rider and what sort of riding you do.

rpm.15 wrote:

I'm an older Vet rider @ 57 years young. I still have my 2023 350 sxf. It's still a fun bike to ride. I just enjoy...

I'm an older Vet rider @ 57 years young. I still have my 2023 350 sxf. It's still a fun bike to ride. I just enjoy the "boring" power of the KX 450. I can do longer Moto's with less effort than my 350. Plus the added torque of the 450 helps me everywhere. I have added the Ti FMF 4.1 and the Twin air power flow kit to my bike. It's now perfect for me. Bone stock silencer and air filter were too restrictive. 

Smith246 wrote:

How many hrs have you got on your 450? For the first 20 or so hrs I liked my kx450 better than the 350 but now...

How many hrs have you got on your 450? For the first 20 or so hrs I liked my kx450 better than the 350 but now im starting to get bored with the heavy feeling slow revving nature of the kx powerband. The new 350 on the other hand is alot snappier fast revving fun style of power. Again I think alot of it comes back to what rider and what sort of riding you do.

rpm.15 wrote:

I'm an older Vet rider @ 57 years young. I still have my 2023 350 sxf. It's still a fun bike to ride. I just enjoy...

I'm an older Vet rider @ 57 years young. I still have my 2023 350 sxf. It's still a fun bike to ride. I just enjoy the "boring" power of the KX 450. I can do longer Moto's with less effort than my 350. Plus the added torque of the 450 helps me everywhere. I have added the Ti FMF 4.1 and the Twin air power flow kit to my bike. It's now perfect for me. Bone stock silencer and air filter were too restrictive. 

Smith246 wrote:

That's the beauty of our sport, we have so many awesome bikes to choose from at the moment.  The only thing I still struggle to understand...

That's the beauty of our sport, we have so many awesome bikes to choose from at the moment. 

The only thing I still struggle to understand is when people say a 350 wears them out more than a 450. I ride both my 350 and 450 with the same level of aggression and I go faster on the 350. Both bikes ridden with the same level of aggression the 450 will always wear you out quicker than the 350.

And when I say same level of aggression I don't mean I ride them aggressively just at the same level.

quadzrulebro wrote:

The stock fork oil volume (just like the previous generation) is 321ml.  On the previous generation bike, I was much happier after raising the fork oil...

The stock fork oil volume (just like the previous generation) is 321ml.  On the previous generation bike, I was much happier after raising the fork oil volume to 370ml.  If I want to try this on the '24, is there any reason I couldn't just use a syringe to inject 50ml of fork fluid through the air bleed holes on the fork to accomplish this?

FGR01 wrote:

Adding 50cc in one shot into the bleed screw is not a good idea.  The bleed screws lead to the space in the inner cartridge that...

Adding 50cc in one shot into the bleed screw is not a good idea.  The bleed screws lead to the space in the inner cartridge that is above the compression assembly free piston.  You need the oil in the outer chamber, not the inner chamber.  Yes, the oil "should" eventually work its way through the bleed holes to the outer chamber as the fork cycles, but 50cc is a lot for this and could cause some hydraulic locking initially until it woks to the outer chamber.   Also, it is tedious to try to get that much oil in through the tiny bleed hole.  You could do 10cc, ride, repeat x5, but that's even more tedious.

Easiest thing to do, put bike on stand, loosen top pinch bolts, remove bar clamp nuts under the top clamp and pull the bars and clamps up and move them front out of the way.  Loosen the fork top caps, push down on the front end and the damping cartridges will come up and out of the forks.  Now you can add the 50cc directly to the outer chambers where it belongs.  

quadzrulebro wrote:

The stock fork oil volume (just like the previous generation) is 321ml.  On the previous generation bike, I was much happier after raising the fork oil...

The stock fork oil volume (just like the previous generation) is 321ml.  On the previous generation bike, I was much happier after raising the fork oil volume to 370ml.  If I want to try this on the '24, is there any reason I couldn't just use a syringe to inject 50ml of fork fluid through the air bleed holes on the fork to accomplish this?

FGR01 wrote:

Adding 50cc in one shot into the bleed screw is not a good idea.  The bleed screws lead to the space in the inner cartridge that...

Adding 50cc in one shot into the bleed screw is not a good idea.  The bleed screws lead to the space in the inner cartridge that is above the compression assembly free piston.  You need the oil in the outer chamber, not the inner chamber.  Yes, the oil "should" eventually work its way through the bleed holes to the outer chamber as the fork cycles, but 50cc is a lot for this and could cause some hydraulic locking initially until it woks to the outer chamber.   Also, it is tedious to try to get that much oil in through the tiny bleed hole.  You could do 10cc, ride, repeat x5, but that's even more tedious.

Easiest thing to do, put bike on stand, loosen top pinch bolts, remove bar clamp nuts under the top clamp and pull the bars and clamps up and move them front out of the way.  Loosen the fork top caps, push down on the front end and the damping cartridges will come up and out of the forks.  Now you can add the 50cc directly to the outer chambers where it belongs.  

motox766 wrote:

I was thinking of adding oil also. Has anyone here tried it? I like the suspension stock but it does tend to blow through the last...

I was thinking of adding oil also. Has anyone here tried it? I like the suspension stock but it does tend to blow through the last 3 inches pretty fast so far. Obviously if it’s my fault on timing a jump or something I have to do my job on the bike but I just would like some insurance on the the fork side for sure. 

quadzrulebro wrote:

The stock fork oil volume (just like the previous generation) is 321ml.  On the previous generation bike, I was much happier after raising the fork oil...

The stock fork oil volume (just like the previous generation) is 321ml.  On the previous generation bike, I was much happier after raising the fork oil volume to 370ml.  If I want to try this on the '24, is there any reason I couldn't just use a syringe to inject 50ml of fork fluid through the air bleed holes on the fork to accomplish this?

FGR01 wrote:

Adding 50cc in one shot into the bleed screw is not a good idea.  The bleed screws lead to the space in the inner cartridge that...

Adding 50cc in one shot into the bleed screw is not a good idea.  The bleed screws lead to the space in the inner cartridge that is above the compression assembly free piston.  You need the oil in the outer chamber, not the inner chamber.  Yes, the oil "should" eventually work its way through the bleed holes to the outer chamber as the fork cycles, but 50cc is a lot for this and could cause some hydraulic locking initially until it woks to the outer chamber.   Also, it is tedious to try to get that much oil in through the tiny bleed hole.  You could do 10cc, ride, repeat x5, but that's even more tedious.

Easiest thing to do, put bike on stand, loosen top pinch bolts, remove bar clamp nuts under the top clamp and pull the bars and clamps up and move them front out of the way.  Loosen the fork top caps, push down on the front end and the damping cartridges will come up and out of the forks.  Now you can add the 50cc directly to the outer chambers where it belongs.  

motox766 wrote:

I was thinking of adding oil also. Has anyone here tried it? I like the suspension stock but it does tend to blow through the last...

I was thinking of adding oil also. Has anyone here tried it? I like the suspension stock but it does tend to blow through the last 3 inches pretty fast so far. Obviously if it’s my fault on timing a jump or something I have to do my job on the bike but I just would like some insurance on the the fork side for sure. 

Victor_Guerrero wrote:

Coming from a 350 to this 450 I will say I can ride “lazier” if I want or keep the same aggression. But glen helen is...

Coming from a 350 to this 450 I will say I can ride “lazier” if I want or keep the same aggression. But glen helen is my home track, with that being said the 450 for me is much more suited to my riding style. I’m a 30C vet guy and when I screw up a corner which happens often the 450 recovery is much better than the 350. When you mess up a rut or turn at the bottom of the hill the 450 is more more rewarding to get back up to speed than the 350.

 

granted I had a 22 with a vortex, the 23+ is much more powerful but with the cost of the stiffer less slow guy compliant frame. 
 

just my .02