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Posted 27 May 2019 - 08:58 am
Hi there
My ride just reached the 100K and I'm planning a deeper maintenance and checkup.
As per Yamaha service manual the synchronization of the throttle bodies should be done without the air filter, but in the JBX bible it is recommended to do it with the air filter in place.
Any advice on this?
Thanks
Master Intermediate Fettlin' Award 2018
Posted 27 May 2019 - 10:07 am
Cant say which is right but mine were always done with air filter in-situ..
Bigred mk1 R1 Calipers- Braided lines- Givi wing rack-Crash bungs- Hi vis bullets-PR2's- and a hoot to ride.
Quad 900 Silver Laser duo tech pipes-Scott oiler-Engine crash bars- Radiator mounted see me ring LED's-Datatool system 3 alarm -Centre stand- Extender fender-Renthal bars-Handle bar risers-Mirror extenders-BMW GS Handgaurds-Acumen uprated horn & Nautilus-Stainless steel Radiator guard-Givi wing rack-OEM screen-Yammy touring screen-MRA Vario-MRA Double bubble cut down for fast as fk riding-Tiger screen-Tank protector-Stomp grip panels-Optimate lead Gone to Heaven 
1991 MK1 in need of some TLC watch this space Gone to Heaven 
Sorted and on the Road Mick 
it's the bike that Jack built 
Monkey Boys Monkey
Posted 27 May 2019 - 02:23 pm
You could adjust without the airbox fitted and then fit the airbox and check the readings to see if they have changed.
Mk2a 2000 in Silver. Top end Refurb @ 41100 miles, Scottoiler, Renthal Road High Bars, Up & Back Bar Risers, Bellypan, DL650 Handguards, Capt. Picard Bar Ends, House of Henty SS Wheel spacers, New Seat Cover Fitted. 58 MPG !! Now owned by chrisbee ! Studley's mk2a Bloggerydoodaah ! Photos of my first MK1 Photos of my MK2a TPLQHCSRSFC No. 1 Fan
Carpe Addict
Posted 28 May 2019 - 11:01 am
As long as the air filter is clean, I can't see why you would sync without the filter? You drive with the filter in place, so it seems logical to make sure they are in sync with the filter fitted...
really likes Carpe
Posted 28 May 2019 - 11:40 am
As long as the air filter is clean, I can't see why you would sync without the filter? You drive with the filter in place, so it seems logical to make sure they are in sync with the filter fitted...
I always did it with the filter fitted. Never gave it thoughts, but you indeed want it to run well with filter fitted indeed. Suppose the air is not distruibuted evenly with the filter(s). Still the throttle valves would compensate for that, and the engine would run well.
With the filter off, you can however tell if any big synch issues are there, when lifting the slides manually and looking at the butterfly valve openings (any clear difference). When the engine is not running of course. So you could do that check beforehand.
Carpe Citizen
seems to like Carpe
Posted 30 May 2019 - 09:18 am
Thanks for suggestions.
I've done the sync yesterday.
For my surprise, after 100K, they wad the exact same value. This is a great machine!!
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