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New K&N air filter Modquad

978 Views 5 Replies 4 Participants Last post by  TDIRTY, 
TDIRTY
Hi fellow riders,

I had posted previously that I installed a new K&N Modquad air filter. At first it seemed it wasn't working right and I thought I may need to re jet. Today I took it out for a ride and it ran great 1-5 gear. So then I took the air box lid off and loved the sound it makes. So I left it off because it was even more powerful and loud. I went riding for 2 hours and the only concern i had was a noise the engine seemed to make while riding fast. It makes a noise like cracking inside the engine like as if the metal is too hot? Is this because I'm running with the air box lid off? It did do it a little too though with it on. Please let me know what this could be. And also should I still re jet? Thanks.
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TDIRTY said:
Hi fellow riders,

I had posted previously that I installed a new K&N Modquad air filter. At first it seemed it wasn't working right and I thought I may need to re jet. Today I took it out for a ride and it ran great 1-5 gear. So then I took the air box lid off and loved the sound it makes. So I left it off because it was even more powerful and loud. I went riding for 2 hours and the only concern i had was a noise the engine seemed to make while riding fast. It makes a noise like cracking inside the engine like as if the metal is too hot? Is this because I'm running with the air box lid off? It did do it a little too though with it on. Please let me know what this could be. And also should I still re jet? Thanks.
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Sounds like pinging to me...do NOT continue to do this unless you are ok with rebuilding your engine. There's a good possibility that you have already damaged your engine. Higher octane fuel may help, but don't ignore the warnings...remove the filter or rejet your carb or you WILL destroy your motor.
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