leaving stock air box, but re-jetting and new springs

[rx1ryda989]

Anybody got a good set-up using the stock airbox, but different jetting and springs for a stock 03' rx1?

 

[black john]

air box

i ran 137.5 main jets with my stk air box this realy picked up the top end and stock springs. but i am at 1100 ft and when reading the shop manual thats right on with yamaha calls for. at my avrage temp and alt .

 

[rightarm]

MJ/147.5,green springs, ram air, 144 megabite studs,Woody's 8 inch carbides,Ultimax belt as well as stock,stock clutching,NGK Race plug equivilent to 10's.

 

[JDMCRX]

I removed the snorkel and cut 4 holes 1" wide on the bottom half of the box. and modified the upper filter cover. went with red springs and 137.5 or 140 ill have to check and it woke it up alot.

 

[JDMCRX]

I like this idea Only prob when u suck up some snow. You have pics of the bottom of the air box

Josh

MJ/147.5,green springs, ram air,NGK Race plug equivilent to 10's.

 

[rightarm]

I like this idea Only prob when u suck up some snow. You have pics of the bottom of the air box

Josh

Never had a single issue with snow ingestion in the 4 years I've owned it, the two ducts go to the bottom of the air box right above the ECU where the rubber snorkel protrudes.As well I am using the stock filter.

 

[rightarm]

I like this idea Only prob when u suck up some snow. You have pics of the bottom of the air box

Josh

Never had a single issue with snow ingestion in the 4 years I've owned it, the two ducts go to the bottom of the air box right above the ECU where the rubber snorkel protrudes.As well I am using the stock filter.

 

[JDMCRX]

No im not saying you will have a prob. Its a awsome idea. YOu have a pic of the inside of the bottom box

 

[rightarm]

No worries,I have no pics of the bottom of the Airbox sorry,but the Airbox itself is completely stock.Because the tubes are grooved the airflow is slowed comparing to smooth ones, still flows quite a bit when you put a hair dryer at the front and your hand at the other end.

 

[JDMCRX]

Nice. Hows the sled pull with it ?

 

[rightarm]

Pulls excellent throughout the rev range more than enough to walk my buds 07 Apex bottom to top.

 

[rx1ryda989]

Sweet advice guys, i think im going to mod the stock air box and springs,jets, combo also. This seems the safest rout to go, filters seem unreliable in certain conditions ie. snowdust and powder

 

[JDMCRX]

just for a note. Running 160 mains with air box mod and im leaning out. runing mid 13.4-13.6 A/F