Re: Cover for a K & N filter on a Honda ST1100

[royst1100]

next trick





covering a k&n filter. tip decrease amount of oil as i found far better performance after first oil change. some usa stocers drill double this amount but ive found its not needed

[Greencan]

next trick

Why have you ruined your airbox cover?

Ciao, the can :)

[royst1100]

more air! and it does work. k&n filter under cover, lightly oiled not to many holes, pipes but better "performance" (not superbike) has greatly improved. i useto wear plugs out at around 3-5k klms. cannot remember last plug change but long before going to wagga towing trailer. besides that cover damaged and have another good one.

[Brock]

i used to wear plugs out at around 3-5k klms

   

I havent even looked at my plugs, and I have had the bike for 60000 Ks

[royst1100]

yeh id get usually 1 plug fail, no oviuse wear but uncleanable

[saaz]

I have tried various combinations of extra air entry points on the ST11 with a K&N filter.  A few probably equivalent to the above add a bit of extra performance, but going too many detracts. Nothing a few rubber grommets to block off a few extra holes won't fix.  Not thta much in it really as the whole air intake system (long trumpets) are the main design parameters that is hard to improve.  A peaky power delivery from an ST11 is really defeating the purpose.

[nate]

Royce,

Am looking at a K & N filter now. What size holes did you put into your air box?

TIA
Nate

[alans1100]

I too have a little trouble with the theory behind what the extra holes in the air box do.

On any given motor the induction stroke will only suck so much air/fuel mixture into a cylinder. By adding extra holes you're only adding another hole for the air to enter which reduces the air inflow from the original inlet.



 

[royst1100]

cannot remember but central to the rim.
 as far as stock air flow I can see what you're saying BUT its worked on my ST. I followed several american who'd done this successfully