Topic: New Repro 400/4 Airbox from Silvers?

[neilma]

Hi folks,
I was trawling David Silvers Site today and notices they have added ( I guess in the last month or so) a repro air box and rubber boots for the 400/4. To save me struggling with the pods I currently have and after going through 2 or 3 aiboxes with solid rubbers that I couldnt get to fit, this seems like a dream come true

Has anyone purchased one yet? Was just wondering how they are qualiy wise and if the bike runs better etc having fitted it?

Cheers

[camelman]

Hmm, sounds interesting.  I've gone through my airboxes and sealed them all up using three-bond before.  It makes a huge difference at idle and seems to rev more smothly.  I could only imagine what a system with completely new parts would do for my engine operation.

Camelman

[jessezm]

I wonder if this is the same one on Ebay I've seen lately from Japan at $130 with free shipping? 

I just found the rubber intake runners themselves on Ebay for $40 and was thinking of making my own "anti-pod" but now considering buying that box as well.

The question is without a battery and air box to hold the actual filter, what to do about filtration?  Presumably you could fabricate some type of plate on the back to accept a standard foam or K&N filter of some kind.

[singedebile]

I wonder if this is the same one on Ebay I've seen lately from Japan at $130 with free shipping? 

I just found the rubber intake runners themselves on Ebay for $40 and was thinking of making my own "anti-pod" but now considering buying that box as well.

The question is without a battery and air box to hold the actual filter, what to do about filtration?  Presumably you could fabricate some type of plate on the back to accept a standard foam or K&N filter of some kind.

There was a time you could buy these plates... atleast for the 500-550, if anything it should be pretty functional AND look pretty cool

[jessezm]

Well I just ordered the airbox so I can do some experimentation.  I can't imagine fabricating a plate that could screw/glue to the back of the airbox will be all that difficult with some basic tools.

I guess the bigger question is, what would be a good filter set up to use?  It will need to be cleanable and reusable/replaceable.  And another question, will a direct filter on the back of the airbox (without the filter housing and snorkel like the stock set up) cause the same kind of issues you get with pods? 

Honestly, my bike runs pretty damn good with K&N pods.  I've got a 466 kit with a cam, ported heads, bored carbs, and yosh-style exhaust, running 98 mains, 38 pilots, needles shimmed one-half position rich from stock, and floats set high at 24mm.  Really the only issue I have now is some low-end richness and a very slight hesitation off idle when the bike is hot.  I do also get some popping on decel with the throttle closed.

But hey, if I can come up with a way to improve things further, I'm all for it!  Thoughts?  (oh, sorry to hijack this post!)

[grcamna2]

I know K&N has Universal filters of different sizes that you can clamp on..I had a customer w/ a 75' CB550F that had one along w/ a Yoshimura pipe and the bike would run great at all throttle settings.

[RickB]

I saw a post the other day of a CB400F with the a K&N style filter attached directly to the inlet side of the rubber airbox. The stock filter/battery area had been deleted. The carbs where on pods too. I wish I could remember the post sorry. The bike was built by a forum member here along with a CB350F with a Majave tank for his wife.

[jessezm]

I have a picture of that in my mind, Rick--I know I saw it somewhere, too!