Drilling holes in airbox

[Fidge]

My SR 125 seems to have the shitiest looking air intake ever, it is also a slow bike.
https://i.imgur.com/ylGR7ao.jpg

The bike has an intake leak at the moment despite being a fairly new pipe, I think it is due to the very small air intake holes. Will drilling a few holes in the airbox fuck up the airflow and make the bike worse?

[smallfrowne]

That's a good one. Sounds like something we'd do at work, fix a leak by drilling more holes

It will likely mess up the carb fuelling yes, can you not get a proper intake hose if that one is definitely leaking?
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[Ste]

[Rogerborg]

[Howling TerrorOutOfOffice]

Dab of grease here n there wouldn't go amiss.
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[Fidge]

[stinkwheel]

[Triton Thrasher]

[stinkwheel]

[Triton Thrasher]

[haroman666]

Yamaha probably spent a fair sum of development cash creating an air intake design that benefitted the induction for all-round good performance at all levels of airflow.

Drilling holes may seem like a great idea for gaining many horsepowers with the increased airflow, but you'll probably create a shitty low to midrange performance and you might end up suffering from water based problems riding in heavy rain or spray.

Ebay will be a great place to find a new carb rubber. Definitely change that!!
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[stevo as b4]

Nomex hose would have been better, but the issue is sealing the manifold and carb, as proper joiners have a lip or ridge inside to locate the parts usually.

[redeem ouzzer]

Put it in a skip, attached to the bike


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[Fidge]

Thanks Stinkwheel , I have bought the one in the link you provided, I made the pipe a bit longer as the pipe from the air box was struggling to reach. It is fairly thick silicon though.

[spannermonkey...]

It's slow bike to start with compared to other 125 Yamaha's of the era. I've ridden one, something of the 90's a four stroke chopper.

Every year folk drill speed hole into air boxes, fit high flow filters and see very little performance in a misled belief.. All you will get is more induction noise and less power. Unless you tune the engine and play with fuel and timing, intake/exhaust sizes and bores.
Stop reading all the rubbish on products on websites that if you bolt it on instantly you will have fire breathing horse power it's all sales hype. Their is more to tuning than a drill and bolt on mods

Speed holes in your air box will mean. The carb will run leaner. More air into your engine but the same fuel as you haven't re-jetted. Less fuel in, less bang, less go. Resulting in your engine running hotter and leaner.

Don't bother, as long as you have a good spark, clean fuel, clean carb and air filter then just enjoy it. Then move onto something bigger at a later date.
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Current machines - Aprilia RS250. Kawasaki H1A 500. Past machines - Kawasaki ZX7r P6, Yamaha RD250E (the one that got away), BSA Racing bantam (revs over 10'000 sweet as), Yamaha RXS100, Suzuki GP100, Suzuki GS500K2 - best all year machine ever - come rain, sleet and snow just epic.

[Fin]

[Fin]

https://i.imgur.com/W6V7K7v.png

Fucking perfect, wait 20 days before telling me

[chris-red]

Sort out that corroded connection on the battery, it will cause you issues.
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[Fin]