Print Page - Crank bearings preparation ?

Title: Crank bearings preparation ?
Post by: Pravin on October 15, 2021, 09:07:30 AM

Ok so I have ordered bearings from ebay ....usa n uk

Middle bearings are NOS bit stiff and the 30 40 years old lubricant has turned sticky brown :)

Is it good idea to soak them in 2T oil overnight before building the crank?

Or just use them as is and they will smoothen up ?

Cheers,
Pravin

Title: Re: Crank bearings preparation ?
Post by: m in sc on October 15, 2021, 10:08:35 AM

put in a few drops of premix oil and spin till worked though.

Title: Re: Crank bearings preparation ?
Post by: Pravin on October 15, 2021, 01:36:57 PM

Thanks SC , just doing that now

Regards,
Pravin

Title: Re: Crank bearings preparation ?
Post by: Pravin on October 15, 2021, 01:42:37 PM

Just to follow up on one more post..... What's the difference between hollow and solid crank pin ?
My machinist said solid pins are not RD ones ..

These I have bought

I could not find the hollow pin with a hole ..

Regards
Pravin

Title: Re: Crank bearings preparation ?
Post by: Striker1423 on October 15, 2021, 04:12:38 PM

The crank pins being hollow versus not was just a machining cost savings most likely. If the pin is the same dimension, it won't matter.

Title: Re: Crank bearings preparation ?
Post by: bitzz on October 15, 2021, 04:14:32 PM

AFIK all the Yamaha pins supersede to that splined, solid RD400 pin.

Wiseco makes a hollow pin and there is a hollow Kawasaki you can use.
The difference is weight and the splines "hold" better

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The 2-Stroke Garage => General Chatter => Topic started by: Pravin on October 15, 2021, 09:07:30 AM