if you dont know squat about the YFZ than why would you reply?

Mine runs fine with the cam mod. Ive never heard from ANY reliable source that the cams are ANY different as far as lift and duration, the decomp pin is moved .... but I hear more guys running the YZ cam complaining about hard starting than the stock YFZ cam retarded a tooth.

 

Hey, thanks for replying, and thanks to everyone elses comments. You make perfect sence, but it doesnt apply to my case ( i dont think). I am actually getting way too much gas on starting. My spark plug is just soaked, the intake boot (coming from the airbox) has gas in it, and when I do get it close to starting, I actually have flame come out the exhaust!!
Warm starts are just fine, 4-5 turn overs, and it lites up. Cold starts, it takes about 80 turnovers to lite up!! I am running a 48 pilot (45 was to lean) a 175 main, (172 was to lean), and the stock needle on the 5th pos. I am however waiting on my 450 meedle still and will be running that on the 4th pos.
What I have started doing is going down on the starter jet. The stock is 90, I am down to an 80, and I am going to go down to a 72 (which is the stocker for the yz dirtbike). I thought that was interesting in itself. I also checked the wr and it only has a 65 starter jet.
So, I think i am going in the right direction. I need to get the fuel down upon starting, cause there is WAY too much. Is there anything else I should be looking at to less 'n the fuel at starting? Thanks

 

If you're winding up with a lot of excess fuel, I suggest you verify the float height. If you happen to have bumped the floats you may have disturbed the calibration during rejetting.

 

Are you pumping the throttle while you start it?

 

Is it better to get the Yz cam for both intake and exhaust or just exhaust?

 

With out insulting intelligence this is a BIG thing to make sure your not doing. If your a prior two stroker its a bad habit on a four stroke. Also I know you said you don't believe that its the pilot, but that is one of the biggest circuits thats feeding fuel when starting your motor. Did it start poorly before you richened the pilot? The float level is also a VERY realistic possiblity...

 

It sounds like you are running rich. How is your air mixture screw? I got the zip tye from alba and its nice to be able to ajust it while its running. I am 2 3/4 turns out with 168 main 45 pilot full GYT-R system stock air filter no lid, GYT-R needle clip #5. I am about spot on at sea level. I plan jumping up to a 170 main or 172.5 main after the YZ cam. I am also going with the K&N air filter set up.

Next week I should have the YZ cam in! I will report any problems.

I also do not want any starting issues and decided to go with the YZ cam instead.



Best of luck!!!

 

This may be out of line but did you check for valve clearence after changing the cam? The reason I ask is that if the valves are too tight it will cause you all sorts of cold starting problems when my Pred was too tight it would start after it was warmed up but getting it started for the first time was a ****. Most of the time I had to tow start it I am not real sure about the Yami but it sounds just like my Pred until I adjusted the valves. You have it down that far anyway give it a check. Good luck.

 

By the way it got progressivly worse with mine until it just would not start any more and it had no compression because the valves were hanging open.