18 FC450 more bottom end

I drilled holes for my fc350 and seemed to be a bit better. Nothing crazy, other than dirty air filters

calvinm48 wrote:

I drilled holes for my fc350 and seemed to be a bit better. Nothing crazy, other than dirty air filters

calvinm48 wrote:

I drilled holes for my fc350 and seemed to be a bit better. Nothing crazy, other than dirty air filters

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Yeah i ride alot of sand so my filters get pretty dirty easily so im not to excited on drilling holes but in saying that i never had any dirt get past my airfilters on my ktm (125hours old)

Remove the screen in the exhaust, remove the backfire screen on the filter cage or get a 2 stroke cage. Aggressive map, VP T4 fuel.

Drill a few holes in the Airboz, and remove the filter screen and spark arrestor like others have said.

With a FMF pipe and also remap mine will pull 3rd all the way around the track..... 3rd gear wide open is very fast!

I just went up one tooth on the back as well since it felt geared a little long

14/52 is good. Install a black throttle cam from a 17.

HC piston & cams. Maybe get a more aggressive remap. Turn the throttle more lol

Remove the restrictor in the exhaust

How would 14/52 be for MX? I’m debating on trying this ratio soon.

Giygas wrote:

How would 14/52 be for MX? I’m debating on trying this ratio soon.

Giygas wrote:

How would 14/52 be for MX? I’m debating on trying this ratio soon.

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13/48 is 3:59 gearing vs.14/52 3:71 gearing. I don't think you will see much difference. 14/53 is 3:79 but you might end up with clearance issues. You get 3:85 with 13/50 gearing and 3.77 with 13/49.
I have a 17 and everything I've seen says a slip on works wonders.

Any one have feedback on slip on or full system from FMF, Pro Circuit or Bills Pipe?

Mike 13 wrote:

Any one have feedback on slip on or full system from FMF, Pro Circuit or Bills Pipe?

Mike 13 wrote:

Any one have feedback on slip on or full system from FMF, Pro Circuit or Bills Pipe?

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I’ll have feedback soon on an FMF slip-on for my FC450.

+1 on FMF 4.1 Titan Slip-On, bottom end is much better(this was on 17 450 SX-F) than stock.

Tokyo mods were providing free remap with pipe purchase.

I would go for the full system since it solves other issues.

Adjust the tps to .620mv. Probably set to lean from the factory. KTM/Husky I have checked is set leaner than ideal.

endurox wrote:

Adjust the tps to .620mv. Probably set to lean from the factory. KTM/Husky I have checked is set leaner than ideal.

endurox wrote:

Adjust the tps to .620mv. Probably set to lean from the factory. KTM/Husky I have checked is set leaner than ideal.

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Wow, that's a huge jump from the stock setting of .520. Did you make that adjustment on the stock bike or after a pipe and airbox holes?

First install the second throttle cam that comes with the bike (at least on KTM). That is like re-gearing it. Dont understand how people can ride without it.

Tokyo mods say not to mess with the tps since just moving the idle changes that setting

endurox wrote:

Adjust the tps to .620mv. Probably set to lean from the factory. KTM/Husky I have checked is set leaner than ideal.

endurox wrote:

Adjust the tps to .620mv. Probably set to lean from the factory. KTM/Husky I have checked is set leaner than ideal.

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captmoto wrote:

Wow, that's a huge jump from the stock setting of .520. Did you make that adjustment on the stock bike or after a pipe and ...more

captmoto wrote:

Wow, that's a huge jump from the stock setting of .520. Did you make that adjustment on the stock bike or after a pipe and airbox holes?

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Yes it is a big change. Cusotmer's bike runs cooler now and pulls way better. Stock setting had to rev bike up a bit or it would stall.

Cheers for the replys. Im going order a fmf slip and run 14/52. Ill see how that goes first before remapping. Ive never owned an aftermarket pipe, always ran stock but wouldnt be a bad idea having a spare exhaust if i crash at race.

Heres a photo. Im not a huge fan of stickers

captmoto wrote:

13/48 is 3:59 gearing vs.14/52 3:71 gearing. I don't think you will see much difference. 14/53 is 3:79 but you might end up ...more

captmoto wrote:

13/48 is 3:59 gearing vs.14/52 3:71 gearing. I don't think you will see much difference. 14/53 is 3:79 but you might end up with clearance issues. You get 3:85 with 13/50 gearing and 3.77 with 13/49.
I have a 17 and everything I've seen says a slip on works wonders.

...more

13/48 is *3:69 gearing vs.14/52 3:71

http://www.chaparral-racing.com/blog/2011/04/25/adjusting-your-drive-ratio-changing-your-sprockets-for-maximum-performance/
(Only used the Chaparral link since it has a J-Law pic )

14-52 helps most for the decreased chain torque properties. Have also heard good things about a slip-on to wake the Husky's up, but a full system eliminates the flawed OE two piece tight fit.

Giygas wrote:

How would 14/52 be for MX? I’m debating on trying this ratio soon.

Giygas wrote:

How would 14/52 be for MX? I’m debating on trying this ratio soon.

...more

captmoto wrote:

13/48 is 3:59 gearing vs.14/52 3:71 gearing. I don't think you will see much difference. 14/53 is 3:79 but you might end up ...more

captmoto wrote:

13/48 is 3:59 gearing vs.14/52 3:71 gearing. I don't think you will see much difference. 14/53 is 3:79 but you might end up with clearance issues. You get 3:85 with 13/50 gearing and 3.77 with 13/49.
I have a 17 and everything I've seen says a slip on works wonders.

...more

crc245 wrote: 13/48 is *3:69 gearing vs.14/52 3:71

...more

crc245 wrote: 13/48 is *3:69 gearing vs.14/52 3:71

http://www.chaparral-racing.com/blog/2011/04/25/adjusting-your-drive-ratio-changing-your-sprockets-for-maximum-performance/
(Only used the Chaparral link since it has a J-Law pic )

14-52 helps most for the decreased chain torque properties. Have also heard good things about a slip-on to wake the Husky's up, but a full system eliminates the flawed OE two piece tight fit.

...more

I found 14/52 on my 450sxf made me not shift as much. I basically only used 3rd and 4th, not matter what the track. Always ran my rear wheel as far back in the swingarm aswell. Could be a myth but i think both things helped my rear suspension work better.

I say it again, Mount the quick turn throttle csm before trying anything else. I ran 13-49, and had to go back to 13-48 with that cam.

All I’ve done is a dr.d slip on and the bike wheelies out of every corner. Don’t think these bikes lack any power.