Tenere 700: Throttle Body Sync Procedure

Tenere 700 Throttle Body Sync Procedure

At 12k km it was time to check my 2021 Tenere 700's throttle body sync, which I suspect is out a little, as the bike is no longer quite as smooth as it once was.  This requires some form of vacuum gauge & about 1 hour to remove body panels & tank to gain access to the throttle bodies, sync them & put it all back together....not a difficult job, just a little time consuming. 

Bike Specs

• 2021 Tenere 700 Canadian model (Japan Factory)
• 12, 218 km 7,591 miles
• oem original spark plugs
• valve clearance oem factory
• Guglatech Ultra 4 Air Filter + FunnellWebFilters Pre-Filter
• Chevron regular 87 RON unleaded fuel 

Required Tools

• #4 & #5 allen, T30 Torx, small diameter punch for push pin connectors, long needle nose pliers, small slotted screwdriver
• differential manometer or vacuum gauges - years ago I made an inexpensive & easy to make differential monometer.  It consists of about 6 meters or 20' of continuous clear hose filled with red tranny fluid, rubber vacuum hoses on the ends (better high heat characteristics to prevent vacuum leak) with the left having a T fitting added to the end to connect to the primary TB & air pressure sensor, mounted to a 1.5 meter or 5' tall wood backing plate.  The long length of hose, 2 in-line connectors which act as restrictors, 1 T connector & semi-viscous tranny fluid provide ample damping to stabilize the fluid while the bike is running & prevent bounce/flutter. I used an automotive syringe to put the tranny fluid in the hose then hung the assembly up with open hose ends above it for a few hours to allow all air to escape.
• NOTE: the colour of bolts/fasteners on my bike may vary from yours depending on market, bike colour & year

Seat & Body Panel Removal

•  review the Yamaha Tenere 700 Service Manual instructions

  

• remove seat(s)
• remove the front side faring panels (Yamaha calls them "air scoops") using T30 torx for the 3/side silver bolts  + 3/side raised push pin torx bolts (requires 1/4 turn  counter-clockwise) flanking the radiator to release the front side panels - slide panel back, then up, then out to release the tab from the rear slot & unseat the locating pins

• remove the 2 side panels under the tank using #4 allen - it is not necessary to remove the lower front bolt of front louvered panel (Yamaha calls them "air ducts") under the tank - the rear fuel tank side covers includes 1 recessed #5 allen & 1 black #4 allen bolt on the back of the tank per side (the lower back ones, the 2 upper back bolts securing the painted tank plastic do NOT need to be removed)

• Tech tip: it is NOT necessary to remove the 2 push pin connectors in front of the fuel cap or the painted tank plastic cover

Tank Removal

•  review the Yamaha Tenere 700 Service Manual instructions

• Tech tip: it is easier with very little fuel in the tank - run it well into reserve prior to syncing, or siphon fuel out of tank, if desired & NOTE the position of all rubber & foam pads on all inner surfaces as they have a tendency to dislodge & fall off...perhaps a good time to reattach with glue or 3m adhesive tape.
• remove the 2 push pin connectors (1/side) fastening the plastic front mount to the tank

  

• remove the 4 black #5 allen bolts from the rear tank mount

• carefully pull the tank rearward while wiggling it slightly side to side to release it from the front rubber mounts  & raise the front up supporting the tank mount on a shop towel & securely support it to provide access to the TB

   

• Tech tip: do NOT stress the fuel pump wiring harness & fuel/vent lines & leave them connected to facilitate warming the bike up prior to performing the TB sync.

Throttle Body Sync

• review the Yamaha Tenere 700 Service Manual instructions & ensure throttle cable is adjusted correctly, throttle does not stick, air filter is clean & bike idles normally & at correct rpm in addition to the checklist in the Service Manual below.

  

  

• warm up bike fully, keeping temperature below the fan turn on temp throughout the procedure
• Tech tip: for best results avoid performing TB sync during extreme humidity & temperatures

• using a long needle nose pliers carefully remove the rubber vacuum line cap from the right TB & attach the right gauge hose

• remove the left TB vacuum hose from the air pressure sensor located above it by the frame & attach the left gauge T connector hoses to the sensor & the TB vacuum hose

• start bike & ensure no vacuum leaks or kinked hoses
• the left TB is the primary set by the factory - the service manual stipulates adjusting the right TB air bypass screw to sync - adjust to the desired setting using small increments - after each adjustment rev the engine 2 or 3 times, each time less than 1 sec & allow the idle to settle

 

 

• Tech tip: if idle is erratic or synchronization cannot be acquired, check for vacuum leak and/or kinked hose or other problem that may require further investigation or dealer service
• shut off bike, remove the gauge hoses & re-install the left TB hose to the air pressure sensor & right TB vacuum line cap & restart to ensure proper operation

Reinstall Tank, Body Panels & Seat(s)

• reverse of removal procedure starting with tank, then the 2/side lower panels under the tank, then the large front side panels & the seat(s) last
• Tech tip: use blue locktite on all bolts 
• Tech tip: reset all push pin connectors by pushing the inner extended part back into its housing prior to re-installing on bike - once properly in place push the extended part in until in snaps/pops in place to lock them - the raised Torx head ones can be a little finicky, so ensure that they are fastened properly before riding...I lost one that had not fully snapped into place 

Install Tank

• once tank is securely pushed forward & seated on the rubber mounts install the 4 rear tank mount #5 allen bolts - NOTE that the tank sits on the large rubber frame bumper & that the rear tank mount pivots on the upper 2 bolts & the lower section may not sit flush with the frame mounting point until those 4 bolts are tightened

 

• do not forget about the 2 push pin connectors at the front of the tank

 

Install 2 Under Tanks Side Covers

• see pic below for overlap fitment of the front side air duct cover & rear side fuel tank cover, NOTE that this bolt is a long black #4 allen

Install Large Front Side Panels

• position the body panel rear locating tab above the upper rear slot, insert down into the slot, then slide forward & while aligning the panel locating pins with their respective holes position the panel correctly & install the 3 #30 Torx bolts & 3 Torx head push pin connectors flanking the radiator

Install Seat(s)

• test ride time 😀

Here is a video by CVB ADV that provides a good overview of a Tenere 700 TB sync