new top end.

[Darrell]

Ok the blaster has finally pissed me off enough and i just ordered my top end! Im gonna use the DIY guide but is there any tips or secrets i should know before i start this? This is my first time!! And how do you put your bikes and mod list on here? And what is the break in process i should use when i am done?

 

[blasterboy91]

i cant help you with the top end stuff but for the sigs. jus go to user cp and on the left side there will be a section called edit sigs.

 

[Darrell]

yeah i just firgured that out..thanks man!

 

[Darrell]

i got the motor out and the top end apart and it really didnt look to bad to me but now im just waiting on my kit to come in!

 

[bigdblaster]

i was always been told to run 2 tanks of gas atleast and never go over half throttle this could be wrong.i always coat the sleeve with alittle oil before i put the piston in to. which i see most machine shops do it this all could be wrong so keep askin around to make sure i dont wanna be the reason ur motor blows up

 

[Darrell]

lol well i gotta have someone to take the blame if it does, cause im not!!! lol..

 

[bigdblaster]

it has always worked for me and that is what yamaha shops have told me..im not sure if putting oil in the sleeve has much inpack but i wouldnt think u would wanna dry run it up in there and when i got mine back from machine shop yesterday it had oil in the sleeve. but still ask around to see what other guys tell you

 

[Darrell]

well im not gonna dry run it thats for sure!! That would probally be a little rough on my virgin blaster!! But what type of oil up put in it?

 

[mike11743]

on any bike I have rebuilt, I have always put oil on hte cylinder wall. As far as breaking in the engine, there is a thread on here somewhere. It goes something like ride it for 15 minutes then let it cool for a half hour. Do this like 5 or 6 times, increasing the amount of throttle you give it with every ride. After that you are good to go. I rebuilt my CR 125 and let it idle for a couple minutes, and then took a couple laps around my house giving it little throttle. I let it cool down, changed the oil and then beat the hell out of it. The top end is over 2 years old, and the bike gets ridden very hard just about every weekend and still has tons of compression. I always mix the gas at 20 to 1 for the break in tank, even though it will foul plugs a lot faster.

 

[mike11743]

break in process:

http://www.blasterforum.com/do-yourself/315-how-break-two-stroke.html

 

[Darrell]

that does seem like a good process, ill figure somthing out thanks guys!

 

[Oldfart1stATV]

It's easy

Top ends are a breeze. Pay attention to the torque, it's also easy to strip sh*t out. If "it looks good" why are you changing it?

A

 

[regal81455]

Bigdblaster, I hope that when you got your cylinder back from the machine shop you scrubbed the s$^t out of it with liquid dish soap or some similar detergent type soap, the oil that is left over is a protective oil placed on it from the machine shop to inhibit rust ( i believe its cosmoline ) you should always scrub and test with a paper towel till the paper comes out clean, you'll find that there still is dust/abrasive left on the crosshatch, machine shops do the machining they expect you to do all the prep when its time to assemble...otherwise as Old said tops are a breeze, just make sure you have the proper tools ( piston pin puller, torque wrench, and the offset boxend for torqing the jug bolts to spec... ) GL!!

 

[Darrell]

well i already ordered the kit and have it apart and its a stock 01 so i figure i might as well do it now!! But as for the torque specs does any one know what they are? Im very glad you guys mentioned that because i forgot all about it. thank you!!

 

[regal81455]

just dl the repair manual under the DIY section...it gives you the torque specs...if i remember right the jug is 20ft lbs and the head is 18....but check the manual it'll tell you...

 

[Darrell]

thanks guys it'll probally be this weekend before everythings all done ill post final results!!!

 

[bigdblaster]

yeah i clean the sleeve out i guess i should of put that sorry sometimes what im thinking i dont always write but that breakin process probably the way to go i would get about 2 cases of beer though or u will go nuts

 

[Darrell]

yeah its gonna be boring but i dont take beer when i ride its unsafe...


I Take Whores!!!

 

[bigdblaster]

whores work to

 

[Darrell]

lol..i cant wait to get it done though!! i might be trading it for a 01 predator!!