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Old 01-21-2014, 08:32 PM   #2191
dorkpunch
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Joined: Aug 2006
Location: Blackfoot, ID
Oddometer: 4,988
Stumbled across this...





"This is a 1985 350x 3 wheeler that i have converted into a fat cat style bike. It is not finished, i just dont have the time or the room to finish it. has everything to turn it back into a 3 wheeler except rear wheels and tires. will consider resonable trades or offers. call or text with any questions"

http://www.ksl.com/?nid=218&ad=28408...arch=&ad_cid=3
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Old 01-21-2014, 08:41 PM   #2192
jgarrettg
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Joined: Dec 2013
Location: Nevada
Oddometer: 47
Quote:
Originally Posted by RobDek View Post
I don't have a wheel washer nor is it listed on the exploded parts diagram...unless my eyes are deceiving me.

No, the brake side is fine...the chain tensioner with the built-in spacer as it should be...although I'm changing them out.

Later today, I'll start tearing into the wheel assembly and maybe the swing arm.


We must be seeing the flange on that spacer (Marked in red)
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Old 01-22-2014, 04:56 AM   #2193
RobDek
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Location: Moncton, New Brunswick, CANADA
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Yes, I think so but installed backwards.
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1987 Yamaha Big Wheel 350
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Old 01-22-2014, 05:49 AM   #2194
RobDek
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If anyone needs shop manuals for their Big Wheel...

http://www.mybikemanual.com/shop/yam...nual-download/

Posted before but just a reminder.
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Old 01-22-2014, 11:23 AM   #2195
Duster11
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BW350 battery

Does the 350 have to have a battery in place (even a weak or dead one) in order to run correctly? My 350 starts but is sputtering horribly. Just installed an NOS CDI unit but am wondering if I need to have a battery.
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Old 01-22-2014, 11:54 AM   #2196
RobDek
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Quote:
Originally Posted by Duster11 View Post
Does the 350 have to have a battery in place (even a weak or dead one) in order to run correctly? My 350 starts but is sputtering horribly. Just installed an NOS CDI unit but am wondering if I need to have a battery.
Just for shits & giggles...give this a whirl...

http://youtu.be/wbbT45c54Xs
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Old 01-22-2014, 02:06 PM   #2197
epix1718
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Joined: Sep 2010
Location: Michigan/Indiana border
Oddometer: 709
Beyond the engine, are there many differences between the BW200 and BW350? I already own a pdf of the BW200 Service Manual but if it's service aspects match that of the BW350 I won't be buying the BW350 Manual.

If allowed I can host the BW200 service manual in a public Dropbox to share (or if someone has a bw350 service manual pdf I'd love to get a copy)

Also, anyone have a spare rear taillight lens they would sell?

Thanks,
Pete
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Old 01-22-2014, 02:22 PM   #2198
RobDek
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For $12...get all three manuals...

http://www.mybikemanual.com/shop/yam...nual-download/
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Old 01-22-2014, 03:14 PM   #2199
heli-mech
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Joined: Mar 2008
Location: Nova Scotia, Canada
Oddometer: 100
So tear down is complete on my new found big wheel project. The little BW200 is stripped to a bare frame, engine out and forks & swing arm off .... everything is bagged, tagged & boxed.


It was an absolute mess of caked on dirt & grime, a little change up from my last project ..... RC51 fork conversion on my CB919. So other then a few mouse nests & a previous owner who used packing tape to wrap up wire splices (ugh) everything came apart fairly easily. Here is a quick list of the "Good the Bad & the Ugly".

Bad Stuff
- all the cables are seized or broken.
- clutch basket and plates/fibres etc are missing completely.
- mouse nest in the airbox (removed)
- mouse nest in the exhaust & it is completely rotted out (removed/garbage)
- front tire is cracked
- Found a broken wire or two, plus the packing tape
- jack shaft is seized/stiff
- broken clutch cover bolt in case
- clutch cover has busted mount hole, same spot as bolt

Good Things
- after fixing the broken wires and cleaning up some grounds it turns on and cranks over!
- has good spark
- it has compression
- electric starter works
- wheel bearings are good and drum brakes work
- rear tire is brand new
- front and rear tubes hold air
- seat and plastics are in very good shape
- tank is good
- carb was very clean inside and disassembled easily
- triple tree bearings are good
- kill switch and clutch safety switches work.

My current primary focus will be on finding a replacement TW/BW/XT clutch basket and assembly & investigating the jack shaft issue. I would love to score a complete TW/XT engine locally for spares ...... only time will tell.

Once I get the motor in and running, and the jack shaft serviceable I will be deciding on the depth of this restoration ...... from viewing this thread the big wheel rabbit hole goes pretty deep!
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Old 01-22-2014, 03:18 PM   #2200
RobDek
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Holy quick work!!!
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Old 01-22-2014, 03:28 PM   #2201
heli-mech
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Quote:
Originally Posted by RobDek View Post
Holy quick work!!!

TWSS!

I move fast when motivated ...... plus the blizzard we had today conveniently gave me a reason to not show up at work and tackle the BW200 tear down.
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Old 01-23-2014, 05:27 AM   #2202
heli-mech
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Location: Nova Scotia, Canada
Oddometer: 100
Tore down the swing arm last night!

I was able to get the swing arm ecentrics out without damaging any parts, and the jackshaft came apart fine as well ..... but the jackshaft bearings are seized and need to be changed.

The biggest issue I found was that the jackshaft drive chain must have been run out of adjustment and sloppy for a very long time, the delrin/teflon chain guard was missing where it wraps around the arm and the swing arm is actually deeply worn on the underside from the chain rubbing. I can weld it up easy enough, so thats a simple fix.

Anyone know the jackshaft bearing PN#'s ...... or suitable non OEM alternates?

Also what is the best way to remove the bearings? I can probably rig up a draw through cup style puller, but just wondering if there are some other DIY options for the jackshaft bearings.

Thanks,
Ian
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Old 01-23-2014, 06:08 AM   #2203
heli-mech
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Also does a 12" rear wheel mod exist? Anyone got info/tips or a link?

Ian
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Old 01-23-2014, 07:11 AM   #2204
RobDek
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http://www.partzilla.com/parts/searc...ARM/parts.html

Doesn't Princess Auto offer any affordable bearing pullers?
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Old 01-23-2014, 07:21 AM   #2205
heli-mech
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I am sure princess has something that would work. I just have access to lots of tooling and fab stuff through work, so its cheaper to make something to do the job.
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