Tiny Filter for Valve Seat

[hernz]

you guessed it...Cali Bike! glad that I won't be needing those things...hard to find and probably expensive!

anyhow i've got the carbs ready to put in now... gonna see how it performs as is, because those carbs were gunked! if anyone is planning on cleaning their carbs i highly recommend chem tool DIP, it is seriously gnarly stuff...removed varnish from the jets simple carb spray couldn't get to.

i guess from there i can either A) get snorkels or B) leave snorkels out and jet up

if i go with the latter, would a simple main jet swap do it? or would i have to get the whole shabang with needles/slows? I don't see why those kits cost so much! would probably try asking dynojet/factory pro for the needes only and simply purchase jets from keihin to save $$$.



1. Tires
2. Fork rebuild
3. cbr 900rr shock
4. chain and sprockets
5. rear cowling/fender

anyone input on the above would be great!

thanks for the help so far, u guys have been a big help

things that still need addressing.

[ptlcb1]

I believe the entire kit is so you can find tune the fuel/air ratio.  It puzzles me the way Honda set up those snorkels.  The way they positioned them, they can only suck hot air off the top of the engine's head.  Everyone knows that its best to have cool air flowing into the carbs, to make power.  The bike does breathe better without the snorkels, so why not take advantage of the increased cool air flow you now have? 

Get the jets you need, or just buy the kit, then get some dyno time to really get it set up right.  I can tell you that the money spent to get it set up on a dyno, you will sooner than later, forget.  I did this, and although it initially stressed me out spending the cash, I soon forgot about the money after the first session back on the track!  The dyno guy was a guy that i knew from racing and it was a pleasure to watch him run my 1, and make the changes neccessary to get the most out of the mods that I did to my bike.  I had 3 two stage foam air filters to try and it was cool seeing the changes that they made to my bike's power.  My bike runs soooooo much stronger!  NOW, before you ask, lol, I have looked and I can not find the notes I took, regarding that set up day on the dyno. 

As for your list of future mods...

Tires? I have only race on Pirelli/Metzelers and I LOVE THEM!  Not sure what their street brands are like.

Forks?  The stock front end is on the soft side.  I have a heavier oil and stiffer springs in mine.  Progressive springs and Race Tech Gold Valve Emulator kit in them.

CBR900RR shock?  See shock thread over in the TECH section.

Chain and Sprockets?  I have a 520 chain and Sprocket Specialists sprockets on the rear.  The front sprocket is stock.

My rear cowling is a Sharkskinz F2 race cowling.  Because its so much taller than the stock unit, you need to fab some brackets to make it work, and you lose the passenger seat.


 

[91cb-1]

"Chain and Sprockets?  I have a 520 chain and Sprocket Specialists sprockets on the rear.  The front sprocket is stock"
Is the stock chain and sprocket for the -1 not a 525?

[a_morti]

"Chain and Sprockets?  I have a 520 chain and Sprocket Specialists sprockets on the rear.  The front sprocket is stock"
Is the stock chain and sprocket for the -1 not a 525?

Yes, you can save a fair amount of rotating weight (at the expense of durability) by fitting a narrower chain. IMHO not a great idea on a street bike as it will reduce your mileage by quite a lot, but on a track bike I'm sure it's fine.

[ptlcb1]

   Brain fart on my behalf.  The front sprocket is 520 pitch and has the same number of teeth as the stock one. 

[hernz]

woohoo! got her buttoned back up ..runs like a top! i think i'll just keep it as is for awhile then take it from there

[ptlcb1]

HAPPY DAYS ARE HERE AGAIN!!!   

[Drewski]

The way that air enters the filter can have noticable effects on running IMO. If the air gets assistance into the airbox, which would happen without the snorkels, it can change the flow and create high and low pressure "hotspots" inside the airbox. I notice it more on my RD(RZ), (logical I suppose), where a 10mm hole on the top of the filter stuffed with a piece of scotchbrite can make a massive difference.

            A lot of "snorkels" are also there to cut down on induction roar, a fave on 80s Jap bikes - probably to comply with Japanese legislation at the time.

OP,if you can't find any reasonably priced jets over there, there is a great place in the UK called "Allens Performance" and post should be nominal.

[91cb-1]

I took the foamy filter out of the inner baffles in the air box and wow the difference such a thin piece of foam can make, much more of a growl from the top rev range

[kpr1]

My bike came to me without snorkels but with PVC venturis in their place to smooth the airflow into the box.
When it is windy and I am going at high speed it does affect performance (surging)  Carbs are not made
for ram air.  I do believe that is why the snorkels point downward/backward.

And where would one find a 520 countershaft sprocket?

[Kai Ju]

My bike came to me without snorkels but with PVC venturis in their place to smooth the airflow into the box.
When it is windy and I am going at high speed it does affect performance (surging)  Carbs are not made
for ram air.  I do believe that is why the snorkels point downward/backward.

Re: Surging. Check your carb vent hose, mine had a surging issue until I routed it down by the water pump. Made all the difference in the world.