[Surho]

Hi. Hoping someone can help me. Big Bear 350 4x4 1977 and this bolt shook loose and was lost. Does anyone have the part number or know where I can get one from please? Can’t drive it as oil pumps out when engine is running. Thanks Sue

 

[machell]

Hi. Hoping someone can help me. Big Bear 350 4x4 1977 and this bolt shook loose and was lost. Does anyone have the part number or know where I can get one from please? Can’t drive it as oil pumps out when engine is running. Thanks Sue
View attachment 104984
View attachment 104983

Some kind of frost plug? are those threads..look pretty chewed up,probably metric.

 

[machell]

Some kind of frost plug? are those threads..look pretty chewed up,probably metric.

maybe a window too see the gear oil?

 

[RedRocket]

incorrect link removed

Part #6, but says not available and to contact them. If this bolt is using Yamaha’s “secret code” for part numbers, it might be a size M8 that is 12mm long with most likely an appropriately sized copper crush washer.

 

[reogem]

That appears to be a oil fill plug for the middle gear, part numbers 39 & 40
350 middle gear diag.

 

[RedRocket]

ah, yeah, @reogem you are probably right.

 

[Ridgway81432]

ah, yeah, @reogem you are probably right.

He probably remembers from when he bought one new for his kid

 

[machell]

yes..

That appears to be a oil fill plug for the middle gear, part numbers 39 & 40
350 middle gear diag.

after a couple youtube vidios,the way it looks,wonder if it filled with water and popped it out?

 

[machell]

yes..

after a couple youtube vidios,the way it looks,wonder if it filled with water and popped it out?

froze..?

 

[reogem]

He probably remembers from when he bought one new for his kid

Truth is I get up at 4:30-5 sit here in our camper, drinking a pot of coffee waiting for the Sun and my Queen to rise. I read some of the worlds horrible news. Then move on to GC for some mental relief.
When I saw the diag RR referred to it seemed to be in the wrong area compared to the pic's.
After this weird form of meditation I plan for the days ride. The real meditation!

 

[Ridgway81432]

As you answered the question I didn't have to look, I didn't remember partzilla going back that many decades.
Mental relief? Some might start a tire-oil-machining combination thread to keep you busy.

 

[reogem]

As you answered the question I didn't have to look, I didn't remember partzilla going back that many decades.
Mental relief? Some might start a tire-oil-machining combination thread to keep you busy.

I don't do the Facebook keyboard warrior thing.

 

[01 Grizzly]

i do belive that use to be the sight glass.

 

[01 Grizzly]

and from my experiance.partzillia is a good play to buy parts from for these older bikes.just some things are pricy so i look around.amazon is my other spot.how u fix it.350 big bear was my very first bike.

 

[FlawleZ]

As you answered the question I didn't have to look, I didn't remember partzilla going back that many decades.
Mental relief? Some might start a tire-oil-machining combination thread to keep you busy.

For ATVs, Partzilla actually goes back to 1980 at the earliest for Yamaha. 1976 for Honda. In the OP's case his year is a typo as the Big Bear started in 1987 not 1977.