03 rx1 speed run setup

speed

o/s/o primary spring yamaha sillver secoudary sping at 70 137.5 main jets. and three 5/16 lock washer under the helx (on the studs). you must run 10500 rpm raseing your limeter straps helps as well. ;)!
 
Black John,

Is this setup for sea level? What are the stock jets in the 03 RX?

My 03 is getting slower every year. First year 192Kph on Speedo, second year 175, and this past weekend I could bearly get 163 out of it. My RPMs are around 9700.
 
speed

i am at about 1000-1100 ft above sea level. the higher you go the leaner you need to run lower needs richer. stock mains are 135 s .i got this jetting out of the yamaha shop manual. there is a jetting chart in there. and it works. the clutch sping (primary) is from an 03 mtn note that the 03 rx 1 is the only one that comes with the 15 mm rollers in the clutch after this they came with 15.6 mm rollers to slow the up shift.
 
Here is the jetting chart from the manual that John mentioned. Click the thumbnail for a larger image.

 


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