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AIR! Idea/experience to increase air flow to FS650?

Joined May 2010
35 Posts | 7+
Bergen
Hi!
In the middle of putting my berg together, and as always when questions/challenges come to mind, i search the wisest for answers/ideas:)

Due to some hp increase in my 650 engine, I feel myself in the need of giving it some more air - or lots of it...;)

I have been thinking on external air filter , remove original hose from intake on the carburetor, add new hose with 90 degree angle(very approximate) to put air filter on left side sticking out under frame/seat.

Or - I saw perhaps a genius idea - make a hole in the seat to add air flow? Perhaps combine them somehow?
Found a picture while searching the www:)

Last thought - Air Scoop to force as much air as possible - anyone made anything or heard someone make a.scoop for Berg/motard..?


Comments, thoughts, experience ?



Thanks upfront:)
 

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Taffmeisters - Husaberg, KTM, Husqvarna, Gas Gas, dirt bikes - servicing, tuning, rebuilds, parts


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have a look at 100819. 100820. 100821. 100822.

on the 650, that mouth under the frame needs chopping off otherwise it cuts down into the filter. The below photo is of my 400 from about 18 years ago. the 650 head is about 35mm higher so..... there's no harm in a carb tilting down at the back by the way. if that is what it takes, that is what it takes.

Attached are 4 photos after mine of how it was done by a customer - dead proper like.

regards

Taffy
PS; why the red oxide paint? I tilted the bike forwards to get a steeper headstock angle. that made the seat height too high so I cut out a lot of the subframe and lowered the seat. It worked really well. heated the seat base and all fitted well.
 

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Hi!

Fantastic!
Thank you very much for the reply Taffy! Sorry about the delayed answer..:)
The seat picture I found , is this from the same bike?
I will start the project quite soon! Follow up with pictures of the process!:)
 
I found this on the internet
 

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not mine and also a waist of time.

But and this is vital Alfy, really, really, really vital; IT LOOKS FAST!!!!!!!!!

Taffy
 
He he, should not underestimate the power of looking fast:D thank you for all the help!;)
 
What if I created a filter box instead of the rubber sleeve? A filter box that extends downwards, occupying the volume now reserved for the battery and the starter motor relay. Could fit a serious intake trumpet. It would install to the frame and carburetor in place of the rubber sleeve. Would it be beneficial? I assume a volume of at least 2 liters.
 
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that would be a great modification. everything should be accessable so you need rubber involved. It does seem thought that you are running before you are walking.

I'll put some ideas up tomorrow. I have a Kiwi customer and he does crazy ****. he has tried this and I'll report on his results.

Taffy
 
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