Cutting top of airbox

[rogering]

Cutting top of airbox as my bikes for pure off road / greenlaning so what's the pros and cons from experienced members

[Calum]

I have been informed by Rob @ Yamaha Skellerns Cheltenham, if you're going to do it, cut the whole top off.

So long as you jet it accordingly, it'll be a derestriction.

[rogering]

Thanks calum I have a 240 jet and my exhaust has restrictor removed also as I rewired my own loom blue is earthed and I had diamond pv and positiond into de restricted position, so with cutting top off what up jet would you say I should go to mate ?

[Louis-DT-WR]

I've done it, even with the 125 engine and standard carb. Ran very well and sounds great

[andrewj1680]

Mine didn't like too much air I've had to seal Some of the hole back up and I'm running a full dep exhaust carbon reeds and a 250 main jet

[Calum]

Well I personally think it's butchering the bike. Personally I just use a pod filter.

[rogering]

True mate I have a pod filter but as mine just for off road I need a level of water protection but only got airbox but you have thankfully sorted out the boot I needed for cars to box an I'm greatfull for mate

[Jens Eskildsen]

My stock bike runs better with the snorkel removed, and the hole in the airbox enlarged.

I have added a little splash guard to keep the water away from the opening.

[Glynn123]

I know this is old, but to help future readers, I have very good results with snorkle removed and 250 main jet, this is paired with a full system.

[declan]

@glynn123 does the snorkel just pull out lads

[Nottsbiker]

Yes, might be glued in like the airbox halves are glued / screwed together

[Glynn123]

Should just pull out, will be stiff due to the big lip mind, mine came out fine.

[declan]

@glynn123 just asking since when I tried I couldn’t get it out and didn’t want to rip it

[Calum]

Put a flat blade between the air box and snorkel and leverage it out. Don't just tug it out.

Personally I prefer my bikes with Snorkels in as they ride better.

[declan]

@calum thanks man and yeah worth a try though while I have it apart

[ryancole2001]

@declan yes it pulls right out