jetting questions

[jasongreska]

Trying to figuere out a good main jet size to start with on my xs1b. I have stock mikunis with mikes pod filters, pamco electronic ignition(also from mikes), mikes shorty universal silencers, and stock head pipes. All other components are set to stock specs.
I think I am running out of main jet on wot. At about 4 to 6000 rpm it feels flat. Any input would be great.

 

[Grinder]

Have a look at the carb guide here:

http://www.amckayltd.com/carbguide.pdf

 

[jasongreska]

Thanks Grinder, I guess I am doing some carb work this weekend. Of course I just painted it and now need to take it apart again. Oh well, that's Murphy for ya.

 

[Brian902]

The main jet is located in the bottom of the carb behind the drain bolt, remove the drain bolt and with a small screwdriver you should be able to remove the jet without removing the carbs. Don't do this with a hot engine and do catch the gas with a small drain pan or something. Fire is never a good thing.

Stock is 130, so 135 or 140 would probably due for jet size. Start with the 135.

I sized a small screwdriver bit the other day; 4mm wide by 1mm thick. For you Americans that's .15748" by .03937". You can calculate the fractions.

 

[jasongreska]

The main jet is located in the bottom of the carb behind the drain bolt, remove the drain bolt and with a small screwdriver you should be able to remove the jet without removing the carbs. Don't do this with a hot engine and do catch the gas with a small drain pan or something. Fire is never a good thing.

Stock is 130, so 135 or 140 would probably due for jet size. Start with the 135.

I sized a small screwdriver bit the other day; 4mm wide by 1mm thick. For you Americans that's .15748" by .03937". You can calculate the fractions.

Thanks Man. I just found a set 0f 135's I had. Going to install em tommorow.