Still not happy with Trottle response!

[jbrooks26]

Hey guys,

I bought a Leftover 02 WR426 in 04 and have done all the mods that I have come across to try and make it run like a YZ, but am still not happy. I don't know if it is just me, maybe my expectations are too high or something. But I was wondering if anyone here lived near Wichita KS and would be willing to maybe do some comparisons? Or maybe even help out a little with fine tuning. I ride in Texas at Muenster a few times a year and I am planning to join the 500 Acre near Stillwater. I have been there once and really liked it. I could meet someone sometime also. Let me know, Thanks.

Josh

[Math]

You probably want to try the YZ timing and map your carb like a YZ. ?

[jbrooks26]

I have done all the mods(including YZ timing) and I am not sure what you mean by maping my carb? I am running a JD jetting kit at 2500 feet with a 168 main, 42 pilot, Blue needle #3, and fuel screw 1.75. Thanks,

Josh

[02WR426Cali]

Jbrooks wrote:

02WR426, BK, Grey/Blue wire, YZ stop, JD Blue #4 170 main, Zip Ty 1.5 turns, uncorked

What is the grey/blue wire you are talking about? I have the same bike as you and my wire is all grey

[jbrooks26]

Jbrooks wrote:

02WR426, BK, Grey/Blue wire, YZ stop, JD Blue #4 170 main, Zip Ty 1.5 turns, uncorked

What is the grey/blue wire you are talking about? I have the same bike as you and my wire is all grey

They are two seperate wires. The grey wire is CDI and the sky blue wire is neutral switch. Hope this helps.

Josh

[JSanfilippo]

Will snipping the neutral switch allow you to start the bike in gear?

[jbrooks26]

You could always start the bike in gear. Removing the neutral switch allows for easier starting. I don't remember exactly why, but you can search for it on here or at thumperfaq.com.

Anyone got any ideas related to my post???

[Indy_WR450]

Yeah the sky blue wire mod is a good idea. The Spark plug would not get full juice from CDI during neutral position of the tranny. This leads to harder starting and therfore cutting the sky blue wire improved starting. ?

[byggd]

I understand the reason for cutting/disconnecting the sky blue wire but does anyone know why Yamaha wanted the juice reduced to the CDI when in neutral in the first place? Will disconnecting the wire shorten the life of the CDI or other ignition components?

[Blaster21996]

Good Question!

[jbrooks26]

I guess I will repost my question, and you guys can have this post.

[Indy_WR450]

I doubt it shortened any life on my CDI unit that has over 15,000 miles on it! ?

[byggd]

Good point Indy, but why the heck did Yanaha do it in the first place? Seems there has to be a reason ?

[flatnacker]

Which brings me to my original question-does anyone actually know what they are talking about??? Who is the person who said its a good idea to cut this blue wire, if they are knowledgeable enough to know to cut it surely they are knowledgable enough to know why it was there in the first place??