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Old 09-25-2019, 01:04 AM   #104
dezrcr822
Gone Wild
 
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Yamaha
 
Join Date: Mar 2018
Location: The Desert
Posts: 248
Default Re: 1982 G1 J17 Information and upfitting Catalog

I run a j10 carburetor on a j17 engine. I took the jets out of a flea bay mokini, its a $20.00 china bomb knockoff carb. The jets are slightly smaller than what is in a j10. I think the main is a 35 in the mokini and a 37.2 in the j10 Mikuni. Another member and I had a good back and forth on the jet sizes. I think the thread was called "g1 lean plug reading" or something along those lines you may want to try and search here. Hopefully he will chime in with the thread. Ive been running this setup all year and have had no issues at all from 2200 to 6200 feet elevation. Plenty of power and no fouled plugs. I also run a j10 exhaust and an ET 250 head with 80:1 yamalube premix.
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