Piston sizing on my Yamaha Enduro DT 100?


No replies to this topic
  • BlindRider

Posted April 05, 2013 - 05:54 PM

#1

I got a 1974/75 Yamaha Enduro 100 for free, and for good reason. I know most people will probably just tell me to throw the bike out and save the trouble. Its in bad shape but I dont have a bike and I want to rebuild it since I know absolutely nothing about engines or motorcycles. Long story short I took the engine out because the kick start seemed jammed. The kick start gear is engaging so it wasnt that.

Turns out the piston was seized and rusted to the cylinder. I got the piston out and know that I need to take the cylinder to a machine shop and have the cylinder re bored a little larger, mostly to get the rust out and make it smooth again. Not sure what size piston I need tho, because I am unsure of the piston size that I have now. I was going to have the shop just resize the cylinder to the largest piston size available for this engine.

The information I do have is that there seems to be a 9 (could be a 6) on the inside with an upside down T above it. There are two other number on the inside as well. One is in large easier to read print: 65801 and the other is further in on the inside of the piston: 0112. The outside has ART printed near where the pin goes to connect the piston to the crank arm. Any information would be appreciated, and I apologize in advance if some of the vernacular I used to describe the piston is incorrect. Thanks





Related Content

Forums
Photo

Worth rebuilding a '00 YZ250? by mr.boombastic


Dirt Bike   Make / Model Specific   Yamaha   Yamaha 2-Stroke
  • 10 replies
Forums
Photo

My Official LECTRON Carb REVIEW - Two Stroke Use Case - 2002 CR250 by kawi008


Dirt Bike   Make / Model Specific   Honda   Honda 2-Stroke
  • * * * * *
  • Hot  28 replies
Forums
Photo

yz 125 right for me? by 2 smoker15


Dirt Bike   Make / Model Specific   Yamaha   Yamaha 2-Stroke
  • 19 replies
Forums
Photo

Kx 250f vs yz 250 vs yz125 by kxrider1001


Dirt Bike   General Dirt Bike Forums   What bike should I buy?
  • 9 replies
Forums
Photo

Modifying Triple Clamps by RIDER44


Dirt Bike   Dirt Bike Technical Forums   Engineering and Technology
  • 8 replies
 
x

Join Our Community!

Even if you don't want to post, registered members get access to tools that make finding & following the good stuff easier.

If you enjoyed reading about "" here in the ThumperTalk archive, you'll LOVE our community. Come join ThumperTalk today!

The views and opinions expressed on this page are strictly those of the author, and have not been reviewed or approved by ThumperTalk.