61x and yamaha motor questions

[Ronald Trauger]

Hi just bought a fx 1 with a 701 61x motor. Has been sitting for ten years and appears that it had taken on water. Anyway I have the cases all clean and it good condition. Problem I'm running into is the cylinders. They have a little bit of rust towards the bottom, and some minor scoring on the 1 closet to the flywheel.

Since I'm building this for myself I want it done right, what are my options. Few questions as well, are these cylinder the nikisal plate ( like a dirt bike ) because on sbt marine they had sleeves for them but it said they were cast iron

2. should I bore out, resleeve, or replate.

3. Im also adding new pistons, should I got cast or wiesco forged.

 

[Wizards Powersports]

Cylinders are not plated. Bore them and you are good to go.

Many opinions on pistons, cast are OEM equipment and are usually the choice for a stock type application. I have Pro-X piston kits in stock for a great price (OEM cast piston).


Sent from my iPhone using Tapatalk

 

[blackkstar]

Bore them out. You can have them re-nikasiled for about $80 a piece, and with cast piston you usually can just hone them out if things go bad and put in new pistons as opposed to having to rebore.

 

[BruceSki]

^wrong info. No nikasil cylinders on a Yamaha 701

If you want a stock 61x complete engine to install while you build this one I have one for $400 plus actual shipping. I've seen your posts on the Facebook group.