K&N for 750 paso

[florian]

does anyone have experiences with the K&N filter for the 750 paso (weber) ? is it worth installing it?

greets, flo.

[paso750]

well let`s say you won`t have any disadvantages.
If you use a non modified engine with the original exhaust the main pro is that you can wash the filter and don`t have to change it. Intake sound changes a bit. That`s basically it.

If you have some upgrades on your bike I would recommend one.

http://forums.ducatipaso.org/viewtopic. ... ght=du0900

I read in other forums that some no-name foam sport filters can slowely fall apart, so some pieces can get in the carb, but that`s no issue with known filter brands.

G.

[jfiore]

If you have an after-market exhaust, you can get a noticeable increase in power, with a K&N filter and re-jetting of the Weber carb.

My experience was with a low-restriction exhaust (Rennsport exhaust with the packing removed from the baffles) and a K&N installed in the stock airbox. I re-jetted the Weber with 0.060 idle jets, 0.175 main jets, 0.160 air corrector jets, and replaced the stock F-36 emulsion tubes with F-25s (with two of the top four holes sealed with epoxy).

The bike had much better power all across the entire range, with only a small amount of the Weber "hesitation" at partial throttle, 4500 to 5000 rpm.

Without the K&N, the top end was not as strong, and the larger main jets could not be used.

With the stock exhaust and the K&N filter, the power increase is not as noticeable, but you should still re-jet the Weber for improved operation - I use 0.060 idle jets, 0.165 main jets, 0.160 air correctors and the F-25 emulsion tubes with the stock exhaust.

[florian]

thanks for the advices! I do have aftermarket exhausts and I only know the k&n round filter with the crome plate on the top, which I guess can only be mounted with the airbox taken out. as for the idle jets I actually don't know much about carb tuning, the weber on my paso is standard configuration. but it interests me, do you have any technical literature sources about tuning the weber?

[paso750]

You`ll find some info about the Weber carb in the FAQs (first link on top in the forum).
If you want to fiddle with the carb yourself I can recommend the SUDCO Mikuni tuning manual. Ok, it`s no Weber manual but it nicely describes step by step how you determin correct jet sizes describing interdependecies a.s.o.
I have one, when I`ll have some time I`ll try to scan the interesting parts and upload it.

http://www.sudco.com/tool.html#002-999

G.

PS: if you plan to keep the Weber I personally would recommend to keep the airbox and use a K&N flat filter instead of K&N racefilter mounted directly on the carb. The partnumbers of the flat/square K&N filter can be found if you check the link I had posted above.

[florian]

thanks again. I'll keep the weber so I guess it will be the flat k&n. and as the weber works just fine right know I' won't touch it. hehe. but the time will come and I'll probably tune it.

[jfiore]

I recommend the Weber Master Spare Parts And Tech Guide (also referred to as the Weber Tuning Manual) available from this web site: http://www.carburetion.com/books.asp

This book has theory of operation, tuning information, and a full list of part numbers for various types of Weber carburetors including the DCNF.