yfz450 trouble

[bigdogkilla87]

I seem to be having a really hard with my bike its a 2004 yfz450 and it jus really seem to have a very hard time trying to start the carb has a 170 main and a 42 pilot wit stock exhaust and air intake. the carb has a aftermarket needle. The guy i bought it from did all this and it jus doesnt seem to start at all the choke work fine and i have to use it alot jus to try to start but it still stales alot to start. the clip on the needle is on the 4th setting and the air fuel screw it about 2.5 turns out any ideas of what it could be?

[rmcmx22]

your jetting is in the ball park for what you got if the baffle is removed from the stock exhaust. The only guess i got is that either the carb needs a good cleaning, or the valves may need an adjustment. Just my guess. good Luck!

[AJ_YFZ]

try jumping to 48 pilot jet and see if that makes a differe3nce3

[Freak]

time to check your valves.

[bigdogkilla87]

well i just replace the piston rings and checked the valves and they seemed to be good i checked the spring for the valves too so im lost and dont know wat else it could be.

---------- Post added at 10:26 PM ---------- Previous post was at 10:25 PM ----------

Originally Posted by AJ_YFZ

try jumping to 48 pilot jet and see if that makes a differe3nce3

I going to try to this and see if it works thanks alot.

[bigdogkilla87]

I think i solved the problem instead of 2 1/2 turn i just moved it to 2 turns and it seems to be starting up fine but did notice that it heats up alot faster think that might be a problem?

[bigdogkilla87]

So i think i am goin to have to move to a 45 pilot because it still give me trouble starting but i also have a qucik question how is everybody tuning their carb wat special tool r u guys using to tune this tricky bad boy.