Jetting question

flyinb501

flyinb501

Location
Minneapolis, MN
Hey guys I really know absolutely nothing when it comes to tuning, and jetting these things. I recently installed a factory type 4 dry pipe with ecwi, and a Riva head with 35 cc domes. Other than that I believe my engine is pretty much stock. When I bought the ski it had Tau Cetti filters, and it has a choke delete also. I have no idea if it has the stock jetting or what.

Anyway, I was messing with the carb adjustments the other day (just the bottom one) and I found it continued to run better the further I twisted them in. They are now turned all the way in. Do I need a new jetting setup to get more adjustment out of this thing or what? Anybody know what I should be running for jetting, and what is involved in changing these out?

Thanks in advance.
 
Crab

Crab

thanks darin...noswad!
Location
Seattle
flyinb501 said:
Hey guys I really know absolutely nothing when it comes to tuning, and jetting these things. I recently installed a factory type 4 dry pipe with ecwi, and a Riva head with 35 cc domes. Other than that I believe my engine is pretty much stock. When I bought the ski it had Tau Cetti filters, and it has a choke delete also. I have no idea if it has the stock jetting or what.

Anyway, I was messing with the carb adjustments the other day (just the bottom one) and I found it continued to run better the further I twisted them in. They are now turned all the way in. Do I need a new jetting setup to get more adjustment out of this thing or what? Anybody know what I should be running for jetting, and what is involved in changing these out?

Thanks in advance.
Click to expand...
Fpp site has reccomended jetting for that pipe, seems like 75 pilot, 140 mains, stock ns and popoff. You turned the low adjuster off, the pilot may be too big, or too low of popoff.
 
yamanube

yamanube

This Is The Way
Staff member
Location
Mandalor
Im running the same setup with 37cc domes, 75/140 jets. Look at the FPP website it will give you the info you need. Keep your N/S and popoff (spring) stock. Hopefully you didnt run it too long with that lowend screw shut.
 
yamanube

yamanube

This Is The Way
Staff member
Location
Mandalor
No fuel on the low end = no oil on the low end...check your compression. Seems wierd it ran fine for an hour though.
 
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