I have had this bike sitting for longer than I have wanted to ( 1987 cbr100f with 8500 miles ), but mounting the carbs to the cylinder and airbox, is one of the most exasperating, irritating things, I have attempted to do in years. I bought new intake rubbers. When I tighten the clamps on the cylinder intake tubes, there's no way to get the correct angle to get the airbox tubes on to the carbs all the way, so I can tighten them. If i tighten the airbox tubes to the carbs, then there's no way to get the carbs into the intake tubes at the correct angle. If I don't tighten anything until it's properly lined up, then WHATEVER I tighten will cause either the airbox intake tubes to pull away,, or the carb to pull away from the intake rubber. . I have never been a fan of pod filters, but I am now considering them. I have screwed with this so many times only to have separation at the carb to cylinder or the airrbox. that I am at my wits end.



The airbox has VERY little play in it. I do not see how I can possibly get the right angle, and get every tight. I have restored numerous bikes, but I now have to admit, that now I own a cool bike, that t I don't like to work on, 100% due to the way the carbs, airbox, and intake rubbers fit. Ok, it ma
y be just me, but I SURE don't get it.

 

You aren't wrong. There's a steep learning curve. But once you learn how to hold your tongue it's not so bad.

 

You're not the only one. I spent way more time than I'd like to admit trying to get that damn airbox to sit right. It's a good job to bring in a helper that can hold the airbox and push it slightly forward while you align boots and tighten clamps

Also probably start with #2 or #3. Every time I tried to start with 1 or 4 it would pop out as soon as I moved to the other side

It's a real pita. It does all fit together eventually though

 

Thank you. I will give that a try when my new carb. rubbers/insulators come. They sent me a set for a later model. I should have suspected that before I did. I did notice though, that apparently, someone who worked on the bike before had somehow managed to crack the air box in a couple of places. I can't imagine how that could have happened other than somebody being rough with it with a rubber hammer or something. They crack is mostly covered with a rubber sealer of some type. I may have to go with pod filters anyway.

 

I know that a lot of people have trouble getting a good tune with pod filters on this bike, so I wouldn't rush out to buy a set just yet. Mine was also pretty cracked up. That top breather hose was snapped right off, and I had a whole bunch of cracks around the intakes. I gobbed it up with some flexible parts repair (don't use epoxy) and it seems to be holding just fine. The breather hose was worse. I found an air fitting that fit and gobbed it in, then reinstalled the hose with a couple spring clamps. Seems to be holding okay but if I see a nice example show up on ebay I might snap it up

 

Pod filters are very hard to get right with CV carbs.
The CV carbs relies on a restrictive air box and tuning the box for laminar flow.
To get the proper flow you will need tuned extensions and the correct pods to allow air flow into the carb ports.
If you are going with pods it would be best to invest in mikuni's.

 

What kind of mkuni's would you recommend I am in search of a Carburetor option I just got one and all for floats are jammed I haven't rebuilt them but with what I want to do to the bike I would prefer a more reliable optionWhat would be the best for pod filters for mkuni's I appreciate any help you can Give and I'm glad I finally found a forum that hasn't been dead for 5 years