2000 KX 80 engine rebuild

[GEOF]

Thanks Guys. Good information you have supplied.
I have found it is always good to get a range of opinions and your comments are apprieciated.
I am new to this and I would like to continue learning and that is why I posted that info to see what you guys, who have more experience than me, have to say about it.

Great stuff and thanks.

Please keep commenting as I post new stuff.......... as I really would like to hear your thoughts and ideas. It's a great way to learn I feel.

Cheers.

[GEOF]

Hey F5......What is works factory bikes???? Is that a company. I googled it and found vintage works factory bikes. Is that the same thing??

[Crasherfromwayback]

Hey F5......What is works factory bikes???? Is that a company. I googled it and found vintage works factory bikes. Is that the same thing??

Yeah I think he's referring to factory built *works* bikes. I have one in my lounge. It's an SR500 (SR being *Special Race*), as compared to the production KX family you could buy. Now days the race bikes are based on production units with some trick parts thrown at them. Back in the day...they were totally hand built exotica money couldn't buy. Here's some examples for ya...The hubs are sand cast magnesium, the cases are sand cast, the triple clamps hand made from hollow tube and the forks are machined from solid billet. Literally nothing on this bike is a production item baring things like the brake and clutch levers...maybe the brake hose and sprockets. Oh...the front guard is...the rear not. Even the seat base and side covers are not prodcution items. Cost was no consideration back then. Kicking sand in every other cunts face was.

[F5 Dave]

Yeah I'm meaning the factories own race team bikes they lined up at world GP level, both dirt & road race. While they did production racers, - in themselves specialised low volume race bikes, often the full factory efforts were their best attempts at company pride redemption.

Not everyone is as crazy enough to actually try & buy one that has somehow slipped through the typical year end crush program that most factories employed . But Pete is special.

[Crasherfromwayback]

But Pete is special.

lol. In more ways than one you reckon! Very lucky is all. Was just a fluke find.

[GEOF]

Awesome....thanks guys. I did not know that.
I really like that SR 500.
What year is it and did you rebuild it or buy it as it is.........oh and is that in your lounge?????????

[Crasherfromwayback]

Awesome....thanks guys. I did not know that.
I really like that SR 500.
What year is it and did you rebuild it or buy it as it is.........oh and is that in your lounge?????????

Anytime! Cheers, I'm loving it too. Can't wait to wring the fuckers neck actually...but will wait until I restore it to it's former 500cc butt clenching self. It's actually an 83 SR500, that for whatever reason (was perhaps built out the back door as a practice supercross bike or summat) has an 84 SR250 engine fitted. Came with a near new SR250 engine as well...and a spare mag back wheel assemply. There's a geezer in Aust with most of the parts I need to make it a 500 again...he wants my spare engine real bad. Would seem the 250 is poss even rarer than the 500's to find. So I hope to get spares like a works swing arm, fuel tank etc etc as well as the engine bits. Then I can make most of an SR250 as well. 1 1/2 woks bikes can't be all bad!

The bike is as I brought it, bar a soapy wash. The guy (lived in California) got it at a swap meet in 1990 and rode it round the hills of California as his trail bike for 6 years before parking it up. Obviously had no real idea just what he was riding. And yeah...it lives in my lounge. Cunting thing got knocked off it's stand in our shake up the other week. At least it didn't dribble on the carpet. I did though.

[GEOF]

Be careful what rings you run. Gen Kawi rings for example eat iron bores. Wisecos etc are often fit with plated rings & should be okish. Unless they specify otherwise.

Hey there F5

I have used a Wiseco piston kit model 644mo4800. I have been trying to find some information as to weather the rings supplied will be okay for the sleeve. I saw your comments above. Do you think they will be okay. Can you tell me a little more about the different ring types and what I should be looking out for?

Cheers.

Geoff

[F5 Dave]

Piece of paper in wiseco box would have said if only for plated bore. It'll be fine.

Kwai std rings are particularly soft for use with their electrofusion plating which was an early adopter of the process and possibly less robust than other brands, (leaving aside earlier chrome attempts.)

Two soft materials rubbed together will wear alarmingly. Found that out myself. Plate one of them and you're ok.

[GEOF]

Thanks F5.......Good information. There was nothing in the box to suggest they were for Nikasil bore. I am sure they will do the job for both like you said.

[scott411]

you are right doing the research on the rings and pistons, as most of the pistons made for the KX80's will be for a coated bore,

i am not a fan of forged pistons (which weisco are) but they might be your only option with rings etc,

[barty5]

Anytime! Cheers, I'm loving it too. Can't wait to wring the fuckers neck actually...but will wait until I restore it to it's former 500cc butt clenching self. It's actually an 83 SR500, that for whatever reason (was perhaps built out the back door as a practice supercross bike or summat) has an 84 SR250 engine fitted. Came with a near new SR250 engine as well...and a spare mag back wheel assemply. There's a geezer in Aust with most of the parts I need to make it a 500 again...he wants my spare engine real bad. Would seem the 250 is poss even rarer than the 500's to find. So I hope to get spares like a works swing arm, fuel tank etc etc as well as the engine bits. Then I can make most of an SR250 as well. 1 1/2 woks bikes can't be all bad!

The bike is as I brought it, bar a soapy wash. The guy (lived in California) got it at a swap meet in 1990 and rode it round the hills of California as his trail bike for 6 years before parking it up. Obviously had no real idea just what he was riding. And yeah...it lives in my lounge. Cunting thing got knocked off it's stand in our shake up the other week. At least it didn't dribble on the carpet. I did though.

one just sold this year Geoff wards bike all original kx500sr for the small fee of $23,308.50 on bay
http://www.ebay.com/itm/111012793794...794%26_rdc%3D1

[scott411]

one just sold this year Geoff wards bike all original kx500sr for the small fee of $23,308.50 on bay
http://www.ebay.com/itm/111012793794...794%26_rdc%3D1

cool bike for sure, but from 1986 the USA have run a production rule, meaning frames, cases cylinders have to be production, before this it was run what ever you wanted, Honda's factory bikes were famous for being very trick, and kawasaki did a few as well, yamaha stopped doing works bikes in the early 80's as well,

[Crasherfromwayback]

one just sold this year Geoff wards bike all original kx500sr for the small fee of $23,308.50 on bay
http://www.ebay.com/itm/111012793794...794%26_rdc%3D1

Yeah I was watching them with interest thanks mate. Was buying lotto tickets hard out when he was selling his collection. KInda sad to see though. He's obviously come unstuck $'s wise.

cool bike for sure, but from 1986 the USA have run a production rule, meaning frames, cases cylinders have to be production, before this it was run what ever you wanted, Honda's factory bikes were famous for being very trick, and kawasaki did a few as well, yamaha stopped doing works bikes in the early 80's as well,

Yeah sucked when that rule came in. End of (a very cool) era. Glad the SR I got was pre.

[ktm84mxc]

Crasher did get lucky with his SR purchase and good on him for it, lucky bastard. There's quite a few ex works bikes available in the US and Europe check out worksbikes.com it's run by Terry Good and you can source it trough www.vmxmag.com.au . Honda were the ones who sent the bikes to the crushers though many did escape, my fav a RCM125 twin with leading link forks or YZM500 alloy frame etc.
The early 80's were the heyday of the genuine Factory bikes be it a SR,RC,OW, RH,RA .