Crank bearing replacement

[89custom]

finished! shes all back together and look sexier than evah!

its about 1 oclock here when we finished so we couldnt start it tonight lol. tomorow ill do it.

quick question about break in. can you start it the first itme without doing the 15 min idle? or as soon as i get it started for the first time do i have to let it do the first 15 min idle break in with the odd throttle twist? and just anything else very important about break in. i might cry if i mess this up. seriously lol

 

[89custom]

yippy ki yay f*cking piece of sh*t.

so its all together, got some gear oil inter her, got some AMSoil gas mixed to 32:1, fuel into the carb, all ready to go right. cant start it for like a half hour. fiddling with sh*t, we kept taking out the spark plug and cleaning it off probably 5 times out of the like 20 mins of trying to get it going. we get it going right BUTTTTTTT somethings teribly wrong. bad noise, i didnt run it for more than 5 seconds at a time, and we only started it like 4 times. so id say it got about 15 give or take a few running like this(just for further damage reference) anyone know what this is? i cant describe it so i took some video with good sound. (makes me want to cry, sounds so bad)

it almost sounds like somethings loose. we put in the old top end bearing because we lost the new one that cam with the hot rods crank so we think it might be that. you think it is? if it is or not were taking it back apart and taking out the old top end bearing just to take out that variable.(we found the new one) please someone tell me its just that bearing lol.


P.S.
it seems that no one likes to respond to my posts, other than regal <3, or when they do its like after a week. i know i seem to have a habbit of spamming/being a post whore and it makes me think no one wants to read my threads because i post so damn much. if this is not the case, tell me cuz i feel like an idiot if it is. im trying not to post to much but its just this damn engine, problem after problem and i have no other help

thanks a ton

 

[regal81455]

i say replace the bearing that you couldn't find and as your in there see if anything looks out of place but i couldn't tell ya for sure what your prob is, id say ask pitboss he could definitely tell ya, pm him with the link to your video...

 

[89custom]

thanks regal. i found out the problem. i swear these guys at this place called kahuna powersports kawi/yama are complete f*cking idiots. the problem was another wrong size piston. were far from them and we end up never being able to bring the cylinder and the piston was the wrong size AGAIN. so everything runs fine. i put the old piston in and im going to do a break in. it starts up fine and sounds great. only thing is its the old compression, which isnt great but it works fine.

but the thing is, i feel like an idiot thinking about it. maybe they didnt give us the wrong piston? reason asking is because im wonding if the piston expands after you do a break in and then fits properly. doesnt really make sence because things expand and contract, they dont really expand and stay expanded do they?

anyways, happy to have her back together, $450 and many personal hours later. good learning experience atleast.

 

[R&S Polishing]

LOL my kids burnt up 2 motors in their blasters last weekend, 1 lower end only rebuilt it about 50hrs ago CRANK bearing and the other not sure yet havent pulled it apart.....$$$$$$$$$$$$$$$$$$$$$$ good thing i work on them myself or it would be BIG$$

 

[regal81455]

id try to replace that piston ASAP, you dont want to go ruining a nice new cylinder using an old piston with wear patterns...but congrats on finding the prob.

 

[89custom]

well, i think im going to need some more help. and yeah i didnt go up north, well i did but then came back cuz it stoped working, again.

f*cker decided to die on me and not want to start again. brought it back down to my house because theres no point of being up there with no bike lol.

this ones weird. might be a carb problem, but i have no idea. it was running OK yesterday and this morning BUT. saterday and not so much this morning but still noticable, when giving it some throttle it would kinda sputter if you know what i mean, probably not. maybe hesitation is a better word? when say, going in like 2nd, 1/4 throttle up to 1/2 throttle like givin her gas it would kinda go and die out, like it felt like it was stalling, over and over, at a random pace, felt weird and i really didnt pay attention to it, it went ok, but it almost felt like the firing was not off to say, but kinda abnormal. maybe its a common problem?

ok so that and when i got up north, first start was fine then i gave her and went out to his back field and i noticed the sputtering but ALOT worse. like i new something was very wrong so i went back to his house and it didnt want to idle, it would go down almost die then i gave it some gas. i then let it die, then it wouldnt start back up and it hasnt started since then. been trying to get it going all afternoon.

thinking maybe reeds or carb problem. those vforce3 reeds are on there way(ordered yesterday, sat) so ill be putting them in sometime this week. i check the old reeds, there boyeseen power reeds i belive. and they arent cracked or anything but they dont sit fully down, like when no pressure on them, there up about .5mm open, so they dont sit closed. and i do notice when i listen at the air filter, air coming back when i slowly kick it over with my hand. problem? or is it the carb. the guy that i bought it off said the carbs needle valve was a bit bent and would probably flood with the gas turned on and left for 2 weeks+. it didnt give me any problems while i had it working so i dont think its that.

please help. im so pissed off and have no idea what to do now. ive lost hope in this thing and dont think its ever going to run.