Motormount info

[DocDanDC]

I have recently lowered the high frequency vibration that was felt throughout the whole bike. There have been many threads and farkels dedicated to reducing vibration.

However, I have never seen any Posts for proper order, location, or torque ammounts for the FJR motormounts. I would be very interested to know though.

One side of the FJR has motormount bolt sleeves and the other dosnt. I would imaging that the sleeves are used to index the position of the motor in the center of the frame. I think that part of the vibration problem on my FJR was that the sleeveless side may have ben torqued before the sleeve side. This may create some type of gap being big enough to make vibrations happen. OR. Perhaps the motor could have been off centered from torquing "out or order".

Anyone have info on this??

:huh: :eh: :erm:

 

[tyronewildman]

Yep, there was a discussion on the tech pages about this vibe problem and after the Yamaha rep stepped in----read on. interesting. later, De

This from https://www.fjrforum.com/forum//index.php?s...5&st=20&hl=moko

We think that the main problem was that the motormounts were not torqued enough. The other thing is that when I put the sliders (no cut style from Motovation USA), they should have been torqued on the left side first then the right side. Apparently, the left side dosnt have the bolt sleeves and pulls the motor over close to the frame. The right side has the bold sleeves and gets torqued last so it wont pull the motor over. (or thats how it was explained anyhow). It is likely that there was a small problem in the order of torque that made the vibration happen. I knew that it was better after I hit second gear 100 ft down the dealership driveway.

My Moko slider installation sheet says to torque the the slider mount (engine mount) bolts to 55 Nm and from the above post looks like torqueing the left side first cured all his vibe problems. Yep, looked in the FSM on Pg 5-6 and there are 8 steps in torqueing engine mount bolts with 4 different torque values and it does say LEFT SIDE FIRST for the front mounting bolts but the right front mounting bolts aren't torqued till step 6.

 

[DocDanDC]

I guess I will need to buy the Factory Service Manual. Hopefully the Yamaha Dealer can hook me up. That info tid bit was a small technicality but had big effects on the vibration. It makes sense after seeing the bolt sleeves only on one side. That could have saved me 3500miles of numbness!

The bike is very different now. I could actually feel my hands after 2hrs riding. Cant wait to beat the record next trip.