If you are replacing 2 shift forks, I would replace ALL of them.. if they show signs of wear, replace all of them! You also need to find out WHY they are worn out! Bent shift shaft? Do you ride with pressure on the shifter after you have shifted (to make sure it stays in gear)...If the bike has been dropped on the left side, you might have bent them. A PROFESSIONAL needs to inspect you transmission!!
SOURCE: yamaha r1
check the rectifier under the tank to the front of the tail it has two screws holding it has a 5 wire plug.
SOURCE: 03 YZ 250 won't shift into 3rd
You have a bent shift fork. The repair means removing the engine from the frame then tearing it down into about 75 parts which will then allow the bent shift fork to be replaced. This is not a job for the amature mechanic. Wish I were there with you to guide the repair.
SOURCE: engine cuts out at 8000 rpm in any all gears
check your tank breather hose for any blocks or kinks - also have a look at the fuel filter and airbox.
SOURCE: Will 2000 Yamaha R1main switch (iginition) fit an R6?
if the wiring diagram where the same it will work.
SOURCE: yzf r1 03 gear prob or?!
Sounds like bent shifting fork which is expensive. If you are not the 1st owner then you don't know how previous owner treated bike. Often sportbikes are rode hard and banged into 2nd gear which can eventually cause tranny problems like bent shifter fork. First look down by the shifter pedal and inspect that it is fastened securely to the shift rod coming out of the engine/trans case. There is a single bolt that holds the shift lever on a splined shaft and can come loose and cause problems.
If that is ok then find a local mechanic you trust....Good Luck !
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