The New And Improved Unofficial R65 Forum V2
Technical Discussion => BMW Technical Q&A, Primarily R65 => Topic started by: svejkovat on June 27, 2018, 02:47:46 PM
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Hello,
Getting my 83 R65 back on the street. Thought I'd dodged a big bullet. Was under a blanket for almost four years. Full tank of four year old gas. Charged battery and it fired up without a hiccup! Took it around the block and it felt like it was in perfect tune. YEAH BABY!!
I changed the oil/filter/gas/plugs and took it to the next town about 20 mi away. About half way back it started shuddering a bit off idle and getting ragged on acceleration. DAMN!!
So a few carb tweaks and no improvement. I may just have to dismantle the carbs, but I'm hoping that a bit of carb cleaner and judicious use of compressed air and shop vacuum will dislodge whatever's in the carb's rabbit holes.
Anyway, all that drama aside, I tried to get reacquainted with carb sync. Reread Snow Bum. There HAS to be a more elegant procedure. I'm trying to distill the wealth of information on syncing dual carbs generally (95 percent of it applies across the board) and specifically to our R65s.
Did a web and forum search. Anyone have a favorite, simply explained, elegantly demonstrated page or video on carb syncing especially for our model years of CV carbs?
Thank so much.
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Having just gone through the exercise I can give you a (very) few tips. Make yourself a home made manometer with some vinyl plastic tubing, 2 glass bottles of the same size and tops or rubber stoppers you can seal (Shoe Goo is handy hear). You tube has many videos on how to make one.
After setting the Idle jets to spec and a warm up ride readjust the idle jets then set the idle to your preferred RPM (1000-1200) and balance by ear. THEN use the manometer. Hint, very small turns to get the liquid levels the same.
Good luck!
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Thank you. I do have a diy manometer. Still hanging in the garage next to the stored bike. Still filled with red transmission fluid. I was very very happy with the results last time I used it.
Snow Bum, with all respect to his eminence, can be a little ocd on the diy. It may actually be possible to describe how best to drive a deck screw in twelve, single spaced, pages... with footnotes, but at some point most of us lose track of the real gist and just need to get the deck done:)
So if there are any more "carb syncing for idiots" additions please feel free!
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I am using BMW fork oil, 7.5 weight in my manometer .
After making an adjustment, wait 30 seconds or so and let the engine respond to the adjustment .