Plain Bearing crank engine ?s

[Guest]

I just got a 1982 gs650L..and I understand it has the plain bearing crank

The bike has 11K on it

I read things all over the board on this

[tom203]

Yes it does, also has high pressure pump feeding those bearings. No need to worry, most cars use same scheme.

[hampshirehog]

A lot of other bikes had / have them as well. While they're not as indestructible as the roller bearing cranks they're still fine. Keep it serviced on time and properly (which is easy) and it'll probably outlast you.

[gs650mann]

Are those pumps still on the market? I know I open can of worms..Best oil for it? I was think Valvoline MC Oil 10w-40

[tom203]

At those low miles, forget about pump- your carbs will give you plenty of things to worry about. Have you see Basscliff's info warehouse?

http://members.dslextreme.com/users/bikecliff/

[Steve]

Don't know anything about Valvoline MC oil, but the forum favorite is Rotella. Yeah, it's made for diesel engines, but it's also certified for use with wet clutches and has higher amounts of the additives that keep our bikes alive.

If you want to go cheap, stick with the 15w-40 T5 in the white jug, it's about $12 (per gallon) at Wal-Mart.

If you feel better with synthetic, go with the 5w-40 T6 in the blue jug, it's about $22 (per gallon) at Wal-Mart.

Regardless of what oil you prefer, just stay away from automotive oils that have "Energy Conserving" in the API 'donut' on the back label. That is not hard to do, as most of the oils with that label are 30w or thinner. Our bikes call for 40w or 50w, I have not seen any "EC" oil in those weights.

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