crack on stock block

[Mr.Yozo]

last time i'm doing little detailing on my bike when suddenly notice this little crack on the block. i spoke with yamaha 3s tech and informed me that it was factory defect. i have my bike for two years now with 20,000+ on odometer. what i'm wondering is if this crack is from the factory or just got it while using my bike. i usually use my bike on long rides eventhough it's super stock. i spoke as well with one of my friends and says that it's okay because the pressure of the block is happening at the cylinder head.

just want to share some of the pics

 

[vhadz]

bro i think there's nothing to worry as long as it has no leak,
( water/coolant ) is d only possible if your bore leaks,
ride safe...

 

[4f7erx]

View attachment 11565View attachment 11566View attachment 11567 last time i'm doing little detailing on my bike when suddenly notice this little crack on the block. i spoke with yamaha 3s tech and informed me that it was factory defect. i have my bike for two years now with 20,000+ on odometer. what i'm wondering is if this crack is from the factory or just got it while using my bike. i usually use my bike on long rides eventhough it's super stock. i spoke as well with one of my friends and says that it's okay because the pressure of the block is happening at the cylinder head.

just want to share some of the pics

when they say its ok, even its not ? i think you had a problem in the near future. best if you certify that crack to yamaha mechanic, if possible ask a new one. or make complain. ride safe bro

 

[bino46]

thats very dangerous especially when you are riding on long distance u may never know that those cracks will get bigger

 

[SPEED RACER]

i have a spare stock block w/ piston in my house if you like i will sell to you bro, just txt me 09228111288
cylinder block wall hold the pressure of engine.

 

[Samboy Del Rosario]

check my ads on for sale section sir.
i have a stock block of sniper MX for sale thx..

 

[sacker42]

use devcon (steel epoxy) to cover the crack portion of the block.

 

[vhadz]

bro thers nothing to worry 135stock block, is strong enough to handle hot & more pressure than steel bores, that liitle crack is like as thin as a hair its just like a scratch.. ill post pics later, so i can backup my post,, wehehe

 

[vhadz]

this is a stock bore looks like bro..


you can notice that theres a surface. right?

 

[vhadz]

lets clear things now..
im just a poor guy so this is what i use to;


its deep size is 1 inch, from d top of ur block to its bottom hole, or stopper dont know d ryt words,, (shown at pics above).



red X is where ur stock bores crack ryt? green arrow is where d bottom or surface of d hole for d water or coolant..
notice its measure ur crack is about 2inch far from that hole or space for coolant, while d hole is about 1inch size from top to its surface,

 

[vhadz]

so for u to know how thick d bore is; and to know if wheres ur crack located, and if its harmfull or not;



its more than a half inch bro,. so u dont have worry about that, stock bore is more durable than to any bores out there on market coz its espiciallize ones, and composed of yamaha companies secrets..

hope i had help u bro.. ride safe but its still up to u if your gonna change ur stock bore.. ride safe, merry christmass..

 

[Mr.Yozo]

thanks for the feedback and sharing of ideas guys. i'll obseve the crack for couple of weeks and if it's getting worse i don't have any option but to change it. mybe vixion kit will do.

 

[vhadz]

thanks for the feedback and sharing of ideas guys. i'll obseve the crack for couple of weeks and if it's getting worse i don't have any option but to change it. mybe vixion kit will do.

if thats the case bro, get a new one for ur safety & no worries at all ride safe..

 

[boogaks12]

so for u to know how thick d bore is; and to know if wheres ur crack located, and if its harmfull or not;

View attachment 11608View attachment 11609

its more than a half inch bro,. so u dont have worry about that, stock bore is more durable than to any bores out there on market coz its espiciallize ones, and composed of yamaha companies secrets..

hope i had help u bro.. ride safe but its still up to u if your gonna change ur stock bore.. ride safe, merry christmass..

hey vhadz..do you still remember the top ring of your stock piston? the fat or the thin?
tnx for d answer ..sorry i forgot the setting...

 

[vhadz]

 

[HKholic]

I wouldn't worry about it dude. Seen imperfections like that before on MX bikes. But keep an eye it from time to time...........for piece of mind.

 

[fmark]

i have cracks like that on my 135's block, looks like a dry farmland. and still no leakage and the bike is still running, but planning to change it already because its almost 5 yrs now.