Someone Help With Sizes.

[Motocrossguy17]

Hi i know this isn't the correct way to do it but the nearest bike shop to me is like a hour away and i don't really want to go just to get piston measured. so i decided to use a tape measure and its come up as 2inches and one eights would someone be able to tell me the size for it? iv converted 2 inches to 50.8 mm so i think the piston in my engine is a standard one but not entirely sure.

 

[yamaha28]

Sorry to say but a tape measure just isn't accurate enough. You need a micrometer to accurately measure the cylinder bore

 

[Motocrossguy17]

Sorry to say but a tape measure just isn't accurate enough. You need a micrometer to accurately measure the cylinder bore

thanks man i wasn't entirely sure if it could be done by this method or not but il just take it to the shop next time im passing

 

[EZRider76]

Yeah, Micrometer or Calipers man, digital too. Tolerances to the .xxx mean everything with rings and cylinder. You can pick up a decent pair at your local hardware store for maybe $30...and the can be used for everything...just don't use them as a wrench. I:I

 

[Motocrossguy17]

Yeah, Micrometer or Calipers man, digital too. Tolerances to the .xxx mean everything with rings and cylinder. You can pick up a decent pair at your local hardware store for maybe $30...and the can be used for everything...just don't use them as a wrench. I:I

loool i had to use still sins to get my axle nuts off as i don't have a spanner big enough! lol biggest i had was a 34 and it was still too small

 

[Motocrossguy17]

would this be good for measuring them? 6Inch 150mm Digital LCD Caliper Micrometer Vernier Tool | eBay

 

[EZRider76]

loool i had to use still sins to get my axle nuts off as i don't have a spanner big enough! lol biggest i had was a 34 and it was still too small

Hey, what you do with your axle nuts is your business...

 

[Motocrossguy17]

Hey, what you do with your axle nuts is your business...

loool but just need piston rings and i should be sorted so i can get out going to see the private track on saturday so should be good

 

[EZRider76]

would this be good for measuring them? 6Inch 150mm Digital LCD Caliper Micrometer Vernier Tool | eBay

Sure would, I'm guessing by description because I can't open the link, it's blocked here at work. X( I use 150mm calipers all day long, they will work.

 

[Motocrossguy17]

Sure would, I'm guessing by description because I can't open the link, it's blocked here at work. X( I use 150mm calipers all day long, they will work.

awesome dude thats it ordered that way i won't need to borrow one from a mate again lol