Mods? what have you done?
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Joined: Dec 2005
Posts: 287
From: Wisconsin
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RE: Mods? what have you done?
Grinding down the weld is a good idea as to "smooth out" the flow. You are correct about the impact of torque. The exhaust system is "tuned" and requries a certain amount of back pressure with relationship to flow and discplacement to ultimatley produce the optimal usable HP/TQ curve.
That being said, you open the exhaust "too" much w/o changing cam profiles and events, spark, ect, you will most likley suffer in low to mid range performance if not all the way across the powerband. So many guys "think "louder" is better and it makes them feel like there going faster when in fact they lost some along the way.
That being said, you open the exhaust "too" much w/o changing cam profiles and events, spark, ect, you will most likley suffer in low to mid range performance if not all the way across the powerband. So many guys "think "louder" is better and it makes them feel like there going faster when in fact they lost some along the way.
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Joined: Nov 2005
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RE: Mods? what have you done?
ORIGINAL: a16tony
Head pipe... I know as you remove restriction you also loose bottom end torque, any concerns of that with you guys?
Head pipe... I know as you remove restriction you also loose bottom end torque, any concerns of that with you guys?
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Posts: 124
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RE: KLX250S Modifications
ORIGINAL: DJFields
Hi Guys:
I completed the small mods that most of you have already done.
1) Remove the Air Box Snorkle
2) Drill out the first deflection plate in the exhaust with a 1/2' drill
3) Re-Jet carb 122.5 Main Jet - Drill slide vent hole with a #32 drill.
4) Drill out the Crank-Case Vent Hose fitting in the Lower Front Air Box to 3/8"
5) Install 13 tooth counter shaft sprocket. ( Sprocket Specialists )
I test rode the bike after completeing 1 to 4 and it is a very nice improvement of the over all quality of performance. It makes the throttle response more "crisp" and elliminates the low RPM knocking when the throttle was opened below 4000 RPM. The addition of the 13 tooth sprocket has completed the package very nicley.
Now I just need to set up the suspension and I'll have the perfect DS for me.
Later
Don
Hi Guys:
I completed the small mods that most of you have already done.
1) Remove the Air Box Snorkle
2) Drill out the first deflection plate in the exhaust with a 1/2' drill
3) Re-Jet carb 122.5 Main Jet - Drill slide vent hole with a #32 drill.
4) Drill out the Crank-Case Vent Hose fitting in the Lower Front Air Box to 3/8"
5) Install 13 tooth counter shaft sprocket. ( Sprocket Specialists )
I test rode the bike after completeing 1 to 4 and it is a very nice improvement of the over all quality of performance. It makes the throttle response more "crisp" and elliminates the low RPM knocking when the throttle was opened below 4000 RPM. The addition of the 13 tooth sprocket has completed the package very nicley.
Now I just need to set up the suspension and I'll have the perfect DS for me.
Later
Don
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Joined: Dec 2005
Posts: 286
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RE: KLX250S Modifications
? I can understand getting these things to breath helps on performance (both intake and exh. and crankcase) And getting more fuel (main jet) But what does drilling out the vent hole In the slide help ?[sm=dontgetit.gif]
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From:
RE: KLX250S Modifications
ORIGINAL: scat
? I can understand getting these things to breath helps on performance (both intake and exh. and crankcase) And getting more fuel (main jet) But what does drilling out the vent hole In the slide help ?[sm=dontgetit.gif]
? I can understand getting these things to breath helps on performance (both intake and exh. and crankcase) And getting more fuel (main jet) But what does drilling out the vent hole In the slide help ?[sm=dontgetit.gif]
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MaximusPrime
KLX 250S
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Jan 27, 2013 10:35 PM
