Missing Bolt

Surho said:

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

machell said:

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

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maybe a window too see the gear oil?

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.

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

ah, yeah, @reogem you are probably right.

RedRocket said:

ah, yeah, @reogem you are probably right.

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

yes..

reogem said:

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

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

machell said:

yes..

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

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froze..?

Ridgway81432 said:

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

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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!

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.

Ridgway81432 said:

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.

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I don't do the Facebook keyboard warrior thing.

i do belive that use to be the sight glass.

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.

Ridgway81432 said:

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.

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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.