mc28 airbox mod

**Wed Apr 28, 2010 2:07 pm » Post: #1 » Download Post**

i've been searching around, can someone link me to a tutorial for this quick modification

thanks
_________________
MC28 sp

**Wed Apr 28, 2010 2:27 pm » Post: #2 » Download Post**

No real secret. Either cut the back of the airbox lid off like I did - gets you a big square opening, or get a one inch (25mm) drill bit and drill four holes in the lid wherever you choose - two either side of the central web, two on the sides, up to you really.
_________________
MC21SP Plaything
BMW F800GS Bumblebee
Triumph 9551 Daytona Big boys toy
FJ1100 Sporting relic
GTS1000 oddball

**Wed Apr 28, 2010 3:56 pm » Post: #3 » Download Post**

We've found 4 smaller holes in the front face (the sloped part) of the airbox lid tends to produce the best results. You can also always tape off two of the holes if it gets a bit cold to richen the mixture a little if needs be.

Cutting the back off the lid makes the induction noise substantially louder, which while it should, is not to everyone's liking.
_________________
Andy.
NSR-WORLD.COM

Please keep all responses to Forum posts on the Forum so that others may benefit.

Please DO NOT PM me for technical advice. My time is precious, and you will probably receive a faster response on the Forum anyway.

Check us out on Facebook! Please "like" our page!

**Wed Apr 28, 2010 6:05 pm » Post: #4 » Download Post**

_________________
MC21SP Plaything
BMW F800GS Bumblebee
Triumph 9551 Daytona Big boys toy
FJ1100 Sporting relic
GTS1000 oddball

**Thu Apr 29, 2010 6:35 pm » Post: #5 » Download Post**

does the same recommendations hold true for an MC21?

**Thu Apr 29, 2010 7:04 pm » Post: #6 » Download Post**

Yep, same mods...faster bike Wink

_________________
Please do not PM me technical questions, if you can't find it on the Forum start a thread

**Thu Apr 29, 2010 7:06 pm » Post: #7 » Download Post**

Yes, only the gains will be much better.
_________________
If I have to take the carbs off once more...

**Thu Apr 29, 2010 9:04 pm » Post: #8 » Download Post**

This is my 21 airbox.

_________________
MC21SP - Roth-tax
CBR400 - track
MC21R - sold
MC21SP - sold

**Fri Apr 30, 2010 11:12 am » Post: #9 » Download Post**

thanks for the photo. do you run an air filter? i plan on using my bike for the street and am planning to use an air filter.

**Fri Apr 30, 2010 12:56 pm » Post: #10 » Download Post**

yep I use a standard filter
_________________
MC21SP - Roth-tax
CBR400 - track
MC21R - sold
MC21SP - sold

**Wed May 05, 2010 5:28 pm » Post: #11 » Download Post**

i know with my past cars, this tends to affect the torque in the low end. is the 28 going to suffer the same issues
_________________
MC28 sp

**Wed May 05, 2010 5:41 pm » Post: #12 » Download Post**

You've lost me! You can't get much less torque than a post 94 restricted 250! Rolling Eyes

If you're worried about the effect of drilling a few holes in the airbox, best you leave it bog stock and go find a bigger bike that doesn't need modification!
_________________
Andy.
NSR-WORLD.COM

Please keep all responses to Forum posts on the Forum so that others may benefit.

Please DO NOT PM me for technical advice. My time is precious, and you will probably receive a faster response on the Forum anyway.

Check us out on Facebook! Please "like" our page!

**Wed May 05, 2010 6:04 pm » Post: #13 » Download Post**

Can you even begin to imagine what an MC28 would be like with even less torque.

There is a smilie of someone hanging them self out there?
_________________
If I have to take the carbs off once more...

**Wed May 05, 2010 6:09 pm » Post: #14 » Download Post**

No, but there's a smiley for an MC28 with even less torque than standard...

Shocked

_________________
Andy.
NSR-WORLD.COM

Please keep all responses to Forum posts on the Forum so that others may benefit.

Please DO NOT PM me for technical advice. My time is precious, and you will probably receive a faster response on the Forum anyway.

Check us out on Facebook! Please "like" our page!

**Wed May 05, 2010 10:21 pm » Post: #15 » Download Post**

Here's what I did to my MC28 aribox lid:

Andy do you ever get tired of telling people how rubbish their pride and joy is? Seriously, there is some great information on this site, and some great people, but the bashing 28s get really takes away from the site in my opinion. You like what you like, for whatever reason, and I like what I like. Can't we all just get along?