BV350 silent block. Fun stuff, NOT!
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Ossessionato
2014 Commuter BV350(45,000)/2015 Scoot Life BV350(10,000)/2010 El Diablito SH150i(30,000)
Joined: 27 Dec 2013
Posts: 2500
Location: Orange Park Florida
Sat Oct 10, 2020 9:38 am quote
Yes you can remove the motor mount assembly without separating motor from the frame. I thought I was going to have to remove the header pipe but I persevered at the risk of damage to the O2 sensor.
I just replaced the coolant 6 mos. ago and I didn't want to mess with that and the rest of the prep work to separate the motor.
You need snap ring pliers and a 32mm X 0.03937=1.259(1 1/4) socket. I used 1 1/4. Nothing special about the rest of the tools.

Step 1) Remove both lower foot rest plastic. 2) Remove silent block snap ring. 3) loosen 32mm nut. 4) Remove the nuts on the 3 long bolts and the small nut/bolt near the SB(silent block) and the spring. 5) Pry under the tire to help slide the 3 long bolts out. 6) Free the throttle cable by removing the clamp to the rear of the SB. The SB housing has a throttle cable retainer on the inside (hard to see).
Now you have to pull down on the suspension bracket to remove the 22mm adjustment screw. This will give you more room to solve the puzzle of sliding off the SB housing. Be very careful wiggling the bracket out. The separation in the bracket needs to slide over the pipe rear of the O2 sensor. DO NOT TRY TO FORCE IT.

One of my motor mount mini silent blocks has failed. I hope I can replace it without pulling the motor.

Having a machine shop at my disposal, I should be able to fabricate a silent block removal tool(not an impact wrench). I figure the money saved by not having to buy a new SB assembly will allow me to replace all the moving parts in the suspension bracket.

597317 bush $2.60 X 4
597374 roller cage $3.08 X 4
CM067809 spacer $6.81 X 1
CM067807 spacer $6.81 X 1
599250 buffer $6.10 X 1
273460 bush $2.10 X 2
272750 silent block $22.70 X 1
486081 motor mount SB $6.61 X 1
total $76.03

Now all I need is to find the special stringy grease. I'm hoping AF1 might have some in a small qty to reduce waste.

1 1/2 hr to remove, maybe 2 hrs to replace it and who knows how long logistics will take.
Hooked
Joined: 06 Oct 2013
Posts: 271

Sat Oct 10, 2020 2:30 pm quote
Iíve kept an eye on mine. So far so good at about 26,000 miles. When the time comes I will do the same thing you are doing. Buying the silent block/bracket assembly already assembled is too expensive.

Thanks for the write up!
Ossessionato
2014 Commuter BV350(45,000)/2015 Scoot Life BV350(10,000)/2010 El Diablito SH150i(30,000)
Joined: 27 Dec 2013
Posts: 2500
Location: Orange Park Florida
Sat Oct 10, 2020 3:25 pm quote
Mine started feeling squirrely in the turns at about 40,000 miles. Just ordered the parts. Too bad I can't work on it for 2 or more weeks. Multi scoot ownership is a good thing.
Ossessionato
2014 Commuter BV350(45,000)/2015 Scoot Life BV350(10,000)/2010 El Diablito SH150i(30,000)
Joined: 27 Dec 2013
Posts: 2500
Location: Orange Park Florida
Fri Oct 16, 2020 1:53 am quote
Motor mount bracket disassembled. I haven't made the SB removal tool yet. The center pivot assembly looked good, no rust and minimal wear. The frame mount pivot reminded me of how the lack of grease affected the center stand.

IMG_2841.jpg
Circled part fits inside behind silent block.

IMG_2843.jpg
I circled the wear on the spacer shaft. The bearings on the frame mount were dry and rusty.

IMG_2844.jpg
Strange that the rubber dampener circled in first pic can cause this wear.

Hooked
LX125, Beverly 350
Joined: 05 Aug 2013
Posts: 317
Location: NE Scotland
Fri Oct 16, 2020 2:13 am quote
keep up the good work. this is useful stuff. i wish manufacturers would add a few grease points for a grease gun!
Hooked
Joined: 06 Oct 2013
Posts: 271

Fri Oct 16, 2020 5:37 am quote
Damnit. Those bearings make me think I should have taken mine apart and greased it while I had the engine out earlier this year.
Ossessionato
2014 Commuter BV350(45,000)/2015 Scoot Life BV350(10,000)/2010 El Diablito SH150i(30,000)
Joined: 27 Dec 2013
Posts: 2500
Location: Orange Park Florida
Fri Oct 16, 2020 6:49 am quote
Bueller wrote:
Damnit. Those bearings make me think I should have taken mine apart and greased it while I had the engine out earlier this year.
Make sure to look at the mini silent blocks on the motor. The one on the right side was self destructing. Removing that will be even more fun, NOT!
Ossessionato
2014 Commuter BV350(45,000)/2015 Scoot Life BV350(10,000)/2010 El Diablito SH150i(30,000)
Joined: 27 Dec 2013
Posts: 2500
Location: Orange Park Florida
Fri Oct 16, 2020 6:52 am quote
Blackmoon181 wrote:
keep up the good work. this is useful stuff. i wish manufacturers would add a few grease points for a grease gun!
I thought you got rid of your BV. Did you get another?
Sergeant at Arms
Weird 80's Vespas & Cool Vintage Lambrettas
Joined: 21 Oct 2005
Posts: 8019
Location: The state of insanity, SoCal
Sat Oct 17, 2020 1:21 am quote
solid work, well done.

was gonna say, sometimes carquest/vatozone/pepboyz have the sticky stuff in small tubes or foil packs at the counter have a look but don't hesitate to ask as well. occasionally they come as a parts kit and never get used so they've got a pile of them kicking around.

had to do a motor mount on a mojito 150 last week. i literally wanted to punch myself in the groin until i passed out. what a pain in all nine of my assholes. the install was cake. it was the bodywork, and the shimmy shaking out the motor that took damn near all day. woof.

but it rides nice now!

-g
Enthusiast
BV250, BV500
Joined: 10 Mar 2018
Posts: 78
Location: SFBay
Sat Oct 17, 2020 3:17 pm quote
O'Reilly Auto Parts stores have a 32 mm socket you can borrow for 2 days free. It's listed in the store as a suspension tool.
Hooked
LX125, Beverly 350
Joined: 05 Aug 2013
Posts: 317
Location: NE Scotland
Sun Oct 18, 2020 11:57 pm quote
breaknwind wrote:
Blackmoon181 wrote:
keep up the good work. this is useful stuff. i wish manufacturers would add a few grease points for a grease gun!
I thought you got rid of your BV. Did you get another?
Great memory! i did and ended up buying a honda sh300i to replace it. had a gearbox carrier bearing collapse last year which ended up damaging the crankcase and ended up buying a second hand engine to replace. its back up and running now! whilst that was in bits i bought a second hand honda NC750X DCT which is running like a champ. being a multi bike owner takes a lot of pressure off when one is down for maintenance!

note i still have a lx125 in various boxes, it needs a few frame after the old one rotted out but given the price of a new one which needs painted, it makes more sense to buy a second hand one!

i do miss the BV350's engine! i may keep an eye out for the MP3 with that engine as i think it would be good fun.
Veni, Vidi, Posti
2008 MP3 500, 2013 BV350, 2020 Vespa Sei Giorni
Joined: 13 Oct 2012
Posts: 8663
Location: Ashburn, Va. Home to the Internet
Mon Oct 19, 2020 9:45 am quote
I replaced the silent block, and found it easier to just pull the motor.
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