1988 570 Exciter Mikuni Carb Service Bulletin - Snowmobile Forum: Your #1 Snowmobile Forum

MeSkiDadOne · 12-16-2012, 09:14 AM

I have a 570 Exciter with what I believe are VM-38 Mikuni carbs. I bought it a few years ago and rebuilt the carbs first thing. I understand there was a Service Bulletin modifying some hoses, power valves and jet sizes. I found a "BB" pushed in one of the hoses and thought someone was messing around. Was that part of the bulletin??? Now I don't know where all the hoses are supposed to be and which one was plugged. Help.

yamadad4 · 12-16-2012, 01:06 PM

heres a link to the tech bulletin: http://www.vintagesnow.com/Yamaha_fi...0_TechBull.pdf.

you find the info a little over half way down so scroll a bit. good luck!

MeSkiDadOne · 12-16-2012, 01:51 PM

JACKPOT!!!!! Thank you very much!!! That's exactly what I needed. Thumbs UP

yamadad4 · 12-16-2012, 06:34 PM

glad to help. dont forget to come back with your results. lots of other exciter guys can gain from this as well.