[The Hobbit]

anyone know about Pro Moto Endo’s Spark Arrestor End Caps?? I thought the extra silencer that came with my 250X was stock.. Apparently I was wrong. It has a Pro Moto Endo’s Spark Arrestor End Cap mounted already. 5'm not sure if the extra 5db spark arrestor/silencer is in it yet because I just googled it. So... any info would be cool!!

[mariom676]

If your end cap is red (new style) the silencer will look like this on the end of it.



But if the end cap is silver (old style) the silencer will look like this.


Here's their website.
http://www.promotobillet.com/catalog/index.php?cPath=46_48_36

[The Hobbit]

Thanks, I was wondering if it will be CA. legal and if the performance gains warrant buying the silencer, and rejetting to it???

[mariom676]

Thanks, I was wondering if it will be CA. legal and if the performance gains warrant buying the silencer, and rejetting to it???

It will be CA legal with the endo on no matter what (sparky).
But the optional silencer piece will make it below 96db (sound legal).

With the different muffler you should jet it, but whether the silencer piece is in or not will probably
not affect the bike enough to rejet,

[The Hobbit]

Thanks for the info. I was looking at your set up and was wondering what the NCYU stands for??

[Asmith]

Thanks for the info. I was looking at your set up and was wondering what the NCYU stands for??

It's the stock needle on the 04-06 California model 250x.

[The Hobbit]

Oh! O.K. thanks. I got my JD jetting kit today, any easy way to get to the carb without flipping the rear frame??

[Asmith]

Oh! O.K. thanks. I got my JD jetting kit today, any easy way to get to the carb without flipping the rear frame??

Do you plan on doing the AP Mod too? if so, flipping the subframe will make things easier.

If you are just doing jets and needle, the carb can be rotated enough to do the job.

Loosen the rubber boots fore and aft of the carb and rotate towards the left side of bike after changing the needle. Pull tank and seat to change needle.

The jets can be accessed from the 17mm plug on the bottom of carb. It's tight, but can be done.

I have found a tool that makes things easier...

http://www.crfsonly.com/forum/viewtopic ... ight=depot

[The Hobbit]

If by AP mod yoy mean air box cut open, It was done before I got the bike. So I can twist the carb bottom to the left side to access the drain and change the main,but I don't quite understand...you said "to change the needle,then remove seat and tank to...change the needle??? Also do I need to change the leak jet or anythingelse?? Sorry, I'm just learning all this stuff and you guy's are great at being patient with me!!

[Asmith]

Check this out.

Ask any questions after reviewing.

http://crfsonly.com/howto/450x/jetting/ ... needle.php

[The Hobbit]

Cool! Thanks again for all the help. I'll try to get to it on sunday and then go out and warm it up!!
One quick ??? Is the slow jet the same as the leak jet?? just a different term?[/i]

[Asmith]

Cool! Thanks again for all the help. I'll try to get to it on sunday and then go out and warm it up!!
One quick ??? Is the slow jet the same as the leak jet?? just a different term?[/i]

No the slow jet is also referred to as the Pilot jet. It is just forward of the main jet. It should be changed out as well to a 42 (stock 40). It is not included in the JD Kit, you will need to get from dealer.

The leak jet is in the bottom of the float bowl and works with the AP. Most likely won't need to be changed.

[The Hobbit]

Bitchin!! you Rock! I'll let you know how it goes.[/i]