DT125R ARCHIVE

dirtpoor · DTR Senior Member

air box mods

the only way is YAMAHA DTR · Guru

which bit,? piccys biggrin

dirtpoor · DTR Senior Member

i cant rember how to put up pic

dirtpoor · DTR Senior Member

dirtpoor · DTR Senior Member

this thing i want to cut it out in the middle to let more air flow will it do more harm than good?

tripr · Guru

mines not like that one mines already been mullered then its fully opened up i never knew

the only way is YAMAHA DTR · Guru

mines never had that, looks like the japans restrictor, seen it before somewhere

xGINCATx · Guru

I'm 99% certain every DTR i've owned didn't have that!

the only way is YAMAHA DTR · Guru

is it an import?

dirtpoor · DTR Senior Member

my honda crm had 1 on the outher side of the air filter but it was removabel. i am now looking to buy a spare air filter mount plate so i can put my bike back to std if it dont work if any 1 got 1 for sale let me know thanks.
ps why restrict a 200 it dont make sence?

dirtpoor · DTR Senior Member

just looked in my 125dtr manual and the drawind dosent have 1.

the only way is YAMAHA DTR · Guru

i got a spare complete airbox i think it has one in it will look tomorrow

the only way is YAMAHA DTR · Guru

up its not going to make any difference unless the holes smaller than the one on the top of the airbox

dirtpoor · DTR Senior Member

ok thanks i may have to make the hole bigger and rejet then :)

the only way is YAMAHA DTR · Guru

hi, £8 on paypal to louisgar@hotmail.co.uk

and it yours

xGINCATx · Guru

the only way is YAMAHA DTR wrote:
hi, £8 on paypal to louisgar@hotmail.co.uk
and it yours

£8? I've chucked many DTR airbox's out purely because they wouldn't sell for anything!

http://www.ebay.co.uk/itm/YAMAHA-DT125R-DTR-Airbox-/200642583736?pt=UK_Motorcycle_Parts&hash=item2eb73adcb8

Get that bought and you can even have a spare airbox for modding and what have you.. Says it even comes with a spare filter which is always a bonus!!

Seiki · Admin

Gotta remember it doesnt work like a RAM system, I think the way Yamaha had it is pretty spot on.

£8 for that is a joke, ive gotten an entire box for that with filter

dirtpoor · DTR Senior Member

what i was thinking was if the hole is that small wouldnt the engine need to work harder to pull the air thro the fillter. causing uneven air pressure on difrent sides of the filter. like i say just a thought please correct me if i am wrong.

dirtpoor · DTR Senior Member

fitted a 125 one to day ran a lot smother but smelt realy hot so i think it needs up jeting got took carb of but float bowl screws rounded off. so have to wait to till i can take to get them removed. then ill try to get some vid of it running :)

the only way is YAMAHA DTR · Guru

they always round off drill the head with a 3.5mm then tap a torque drive in it, works every time for me

dirtpoor · DTR Senior Member

i left my drill at work. ( THE ONLY WAY IS hows your bike running with a bigger carb? and air box cut open ? would you say the carb was worth the monney and dose it add power?

the only way is YAMAHA DTR · Guru

well it was running awsome but can't do a full test because i wasnt insured, but the manifold split so im working on making a custom one

the only way is YAMAHA DTR · Guru

it must restrict you bike having a 125 carb on, also the lanza only has a tmx30 very small when a yz 125 has a 36mm

dirtpoor · DTR Senior Member

yea as far as i know it the same as a 125 carb. it seems so dum to restrick the air box and put a small carb on it. when the exhaust is bigger than a 125 i mean why if it cant suck the air in fast enouth it dont realy need to get the gasses out quicker. i even have a light that comes on to tell me i am braking the max speed limit.(dam japs)

dirtpoor · DTR Senior Member

had to put bk gether as i needed a bike to ride coz my honda got a flat tyre. so i didnt re-jet it yet but it feels so much faster and it trys to lift the front wheel in 3rd gear. cant wait to coppy the (only way is yamaha dtr) and cut the top of my air box.

the only way is YAMAHA DTR · Guru

best mod i ever did apart from the forged piston and its free gd luk

dirtpoor · DTR Senior Member

yea i got a prox piston from a blaster quad. i dont even no if it is a good make. how much did you have to up jet buy when you cut the top out.

the only way is YAMAHA DTR · Guru

well i drilled mine a 240 is about 1.3mm and i drilled 0.10mm at a time until it ran perfect at 1.6mm

dirtpoor · DTR Senior Member

ok thanks

dirtpoor · DTR Senior Member

cut the top off my air box today and re-jetid the carb but think i over did it 290 jet, just waiting for my reeds to come then i'll put it all bk. i also cleand all 2 of the 3 gause fuel filters witch were both blocked. cant wait.