1977 Yamaha XS650D

Reader Contribution by Keith Fellenstein
Published on August 6, 2013
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Editor’s note: If you’re having trouble with that old Suzuki, BSA or BMW, Keith Fellenstein is your guy. From motorcycle tuning tips to detailed motorcycle engine repair, he can draw from a wealth of experience to help guide you to success. Send questions to: Keith’s Garage, 1503 SW 42nd St., Topeka, KS 66609, or send an e-mail with “Keith’s Garage” as the subject.

Yamaha intake question

Q: I’m in the process of restoring two 1977 Yamaha XS650Ds. Upon
attempting to synchronize the carburetors on one of the bikes, I noticed that
there are rubber plugs or “reducers” going from the air filters to the intake.

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