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Old 06-24-2017, 05:16 AM   #58
Megadan   Megadan is offline
 
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Join Date: Apr 2017
Location: Omaha, NE
Posts: 7,913
Quote:
Originally Posted by pete View Post
I have them on 2 of my bikes....
77 Montesa Cota 348 has a 26mm OKO
TTR250 has a 32mm Koso "chinese copy of the OKO"

good carbs... the 32 on the TTR was a bit finiky to get the jetting right
I found the easyest way was to plug the power jet tube while getting the
jets right.. then reconnect it then you were pretty close with the jets..
I prob had it right 10 times... but yer always think one bigger or smaller
move the needle... will be better....maybe I just don't know when to stop fiddling...

The one on the Montesa came pre-jetted from Sammy Millers classic trials in the UK
so that one was easy... plug & play...



..
Thanks for the advice with the power jet, that's a good idea to eliminate that variable. Honestly, my biggest hurdle is to figure out is what jets to start with. I can always go on the "definitely too rich" side, Thankfully the pilot circuit should be the easy one. A 40 is going to be close lol.
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