How to drill airbox?

2fast4u · Post by **2fast4u** » Sat Jul 28, 2007 12:28 am

Reading thru the posts I have found a few suggestions about drilling holes into the air filter box to increase power/speed. Yet none of the posts actually go into to much detail on how to do this- how many holes, where on box... and I can't really find any posts stating if it truly helped.

Not the most mechanically inclined, but I do know how to drill a hole so I figured this would be a good place to start with mods.

Any helpful words?

busaridda · Post by **busaridda** » Sat Jul 28, 2007 1:01 am

Drilling holes in a air box on what kind of moped..scooter.....?

2fast4u · Post by **2fast4u** » Sat Jul 28, 2007 2:46 am

Sorry. An 86 Honda Spree...

Dac · Post by **Dac** » Sat Jul 28, 2007 1:36 pm

remove your air filter cover, get a drill with a charged battery (trust me , battery's help

)
put a drill bit in the drill and drill some holes. now i did this on my elite, for me i did 5 dime size holes and it helped but its different on a spree. i never owned a spree so what for a spree owner to post with how many and what size.
to little holes barely help, but to many and it gets to muck air and bogs

2fast4u · Post by **2fast4u** » Sun Jul 29, 2007 1:10 am

Have to admit, I'm gonna do exactly as you say and wait for a Spree owner to answer... dime sized holes?!? That's big! But as i said before, I don't know jack about working on this thing yet... somebody, help! :)

Dac · Post by **Dac** » Sun Jul 29, 2007 3:39 pm

ok my holes were not 100% as big as a dime but they were Big. i think i did mine a little to big. 5 was good for mine, i did 6 and had to cap off the 6 hole. it was just to much.
i dumped the stock air filter now and went with a dirt bike UNI pod

it works good but i think i need a bigger jet

dukemartini · Post by **dukemartini** » Mon Jul 30, 2007 11:34 am

Dac wrote:ok my holes were not 100% as big as a dime but they were Big. i think i did mine a little to big. 5 was good for mine, i did 6 and had to cap off the 6 hole. it was just to much.

was that after the big bore kit? cause if this guys got a stock spree 5 dime sized holes will lean out the motor huge

2fast- introducing more air into the motor with out other adjustments or even upgrades will cause it to run lean which can destroy a 2 stroke engine pretty quickly. be careful

Kenny_McCormic · Post by **Kenny_McCormic** » Mon Jul 30, 2007 12:21 pm

yea spree engines are really small and picky they lean out easiley and burn up quickly so be careful and do lots of plug chops

2fast4u · Post by **2fast4u** » Mon Jul 30, 2007 1:16 pm

Thank you all for the advice, I think I will skip the airbox drilling for the moment based on your comments. The exhaust? Well that sounds do-able unless anyone has similar advice... Thanks for saving my Spree guys.

Kenny_McCormic · Post by **Kenny_McCormic** » Mon Jul 30, 2007 3:41 pm

Your welcome. Drilling the exaust helps ALOT with take off and adds a little to the top speed.

2fast4u · Post by **2fast4u** » Mon Jul 30, 2007 11:30 pm

The pic helps alot but I stil have a few questions:

1) As with the airbox, are there any adjustments or upgrades I need to do so that the exhaust drilling doesn't throw things off?
2) What diameter should my bit be?
3) If I can't reach through to drill thru all of the baffles will only drilling a few hurt?
4) And (last question, I promise) how much louder will this make the scoot- loud enough that a cop will pull me over and question it?

I am really amazed at how helpful and giving of info the members on this board are! Hopefully I will one day be able to do the same...
Thanks again. :D

Kenny_McCormic · Post by **Kenny_McCormic** » Tue Jul 31, 2007 12:21 am

2fast4u wrote:The pic helps alot but I stil have a few questions:

1) As with the airbox, are there any adjustments or upgrades I need to do so that the exhaust drilling doesn't throw things off?
no not that i noticed best to do a plug chop just to be safe.
2) What diameter should my bit be? biggest you can fit in the hole
3) If I can't reach through to drill thru all of the baffles will only drilling a few hurt? wont hurt probably wont help much though
4) And (last question, I promise) how much louder will this make the scoot- loud enough that a cop will pull me over and question it? its not that loud

I am really amazed at how helpful and giving of info the members on this board are! Hopefully I will one day be able to do the same...
Thanks again.

your welcome

scooter trash · Post by **scooter trash** » Fri Nov 23, 2007 1:50 am

don' t drill through all the baffles. 2 strokes need back pressure to run right. drill 2 or 3. it makes the bike loud, depends on how many baffles u drill out

Kenny_McCormic · Post by **Kenny_McCormic** » Fri Nov 23, 2007 3:34 pm

No not all of them i have 4 drilled oout of mine.

Honda Spree and Elite 50 Forums

How to drill airbox?

How to drill airbox?

huh