trueing,welding, and balancing the crank

don thats sounds cool, if you want to see if he still has the motor. let me know what you find out.

k heres the latest update on my sob story. found a guy that has a wrecked kz1000 ltd but its an 82. motor runs good and hell sell me the whole bike for 500, no title. i believe this should just be a drop in motor for my 82 right? cant remember if the 80 was different or the 82 was diff from mine. get me straight guys. so if this motor does work, ill be back on the road and have some of the parts from my old engine to sell to make up some of the damage. buy it?

Hang on to your old motor if you have the dough... This is a good chance to blueprint your own engine from the ground up.

yes sully,the 82 should just be a plug and play for you.and you could sell off the rest of the bike to offset your cost for the repairs.possibly being able to keep your old engine for future mods once you get your bike up and running right.because once you get used to the power you have you will want more,it is a disease,haha.sounds like you are on the right track tho.

531blackbanshee wrote:

...once you get used to the power you have you will want more,it is a disease,haha.sounds like you are on the right track tho.

Welded/balanced crank, high compression pistons and race rods, oversized valves and cams, port & polish :evil:

sounds good, i was kind of hoping to be able to sell the donor off to recover some of the damages. wifes pissed already because of having a broken bike, might as well spend the cash and dig alittle deeper, i mean shit im already there , right?

in too deep to stop now!
FORWARD!!!!!!!!haha

Man I read some of the replies, most seem to be VERY helpfull. But give yourself a break ! Blueprinting, balancing, all that? I am a car/bike guy myself. I think your buddy is thinking you have sleeve type bearings and bolt on rods. All the years I have been messing wioth race cars I don't know of any machine shop that will do anything more than bore cylinders for a bike, and maybe a valve job.
Call Falicon or any other well known BIKE shop of your choice and get it indexed, trued. {and welded if you like}
Take it from a penny pincher like myself. Sometimes ya just gotta pay the piper....LOL
Its certainly not worth attempting to do anything to the crankshaft my a novice, or someone that just knows how to weld. Just think of the possible out come !
That way you'll know EXACTLY what you have, as well as who did the work.
Problem solved with a peice of mind !
GOOD LUCK !

To further explain myself:

I am an acoustics specialist, and I have been measuring harmonic resonance (occasionally as the result of balance's relationship to movement also) for some years now.

I may have a different perspective on these engines than a lot of guys who popped out fresh from MMI or their local university with a two or three year certificate of functional bike repair knowledge.

I have thousands of dollars in microphones, preamps, and acoustic sensors of different frequencies to work with, and to top it off I have about 8 years of metalworking skill and more than that in computer hardware/software studies to work with as well. I've only been rebuilding engines for 3-4 years now, but I've attempted to dedicate myself to the science behind tweaking performance and harmony from these machines.

Any force caused by any imbalance is only multiplied non-linearly with speed.

Any difference in the speed, volume, and velocity of the intake and exhaust passages will cause one of these imbalances. Any size difference in the combustion chamber will surely cause one of these imbalances.

Maybe I'm picky, but I don't believe in boring only one cylinder, but some bike shops will do it without question if you ask. I've even thought about shimming the spark plugs so each one was facing the same direction at the same depth...

Look it up; even if you are not racing your engine it will be much more durable and efficient if it is harmonically balanced :silly:


edspring1 wrote:

Man I read some of the replies, most seem to be VERY helpfull. But give yourself a break ! Blueprinting, balancing, all that? I am a car/bike guy myself. I think your buddy is thinking you have sleeve type bearings and bolt on rods. All the years I have been messing wioth race cars I don't know of any machine shop that will do anything more than bore cylinders for a bike, and maybe a valve job.
Call Falicon or any other well known BIKE shop of your choice and get it indexed, trued. {and welded if you like}
Take it from a penny pincher like myself. Sometimes ya just gotta pay the piper....LOL
Its certainly not worth attempting to do anything to the crankshaft my a novice, or someone that just knows how to weld. Just think of the possible out come !
That way you'll know EXACTLY what you have, as well as who did the work.
Problem solved with a peice of mind !
GOOD LUCK !

indexing plugs has been around forever no big deal.find yourself a good used crank check it for straightness and spend $75 to have pins welded if you want.these motors do a prety good job of balancing and cancelling things out with the 1-4/2-3 firing order as long as the pistons are close in weight.ive used and abused the motors in these bikes about as hard as anyone except lorcan of course! they are a very solid motor even in basically stock form;)

I wish some of you were closer, I'd love to work with a lot of you folks who have had their hands in engines for a while.

I have a lot to learn, but I'm hoping that I'll have a lot to offer as well.

Thanks to those of you who are more experienced than I who take the time to share their gems on forums like this I've gone from not knowing much about engines a few years back to only 2 years ago to milking enough power out of a friend's Briggs 5hp to blow the rod out of the side of the case like a bullet with just a little bit of top end work.

Within the last year I've graduated to larger engines such as my Type III VW motor build, my 250CID Chevy, my KZ400, and now the KZ1000.

I just wish I could find the utopia in which I'd learn the finer points of machining and engine work from more experienced people.

For now, I'll continue to learn at the pace that my environment allows me, and hope that my contributions are valid here!

PLUMMEN wrote:

indexing plugs has been around forever no big deal.find yourself a good used crank check it for straightness and spend $75 to have pins welded if you want.these motors do a prety good job of balancing and cancelling things out with the 1-4/2-3 firing order as long as the pistons are close in weight.ive used and abused the motors in these bikes about as hard as anyone except lorcan of course! they are a very solid motor even in basically stock form;)

i could care less about blueprinting it and all the other hopped up goodies. i just want the sob to run right. its got plenty of power for me and was intended as a daily commuter.