KX250 rebuild - after all I've ridden it half a dozen times and it's worn out

**grantman** · 26th April 2011, 19:23

Arron you loser
You buy a bike from Graham and dont Check it over before riding it
The guy you quoted as having the machanical skills of a chocklate fish!

You ride like a little girl ...So go fast parts arnt really going to help you

I have had my mighty 1990 XR250 for 5 years and I just put petrol in it ...and still thrash you.

I look forward to reading your progress

PS:Graham & I looking forward to talking to Julie at your next BBQ

**Arronduke** · 27th April 2011, 00:40

Gentilemen relax.... only having some fun here.
We all know the facts regarding my dirt bike riding skills.. made that quite clear at the beginning of the thread... its not my strong point.

The fact is I can't help BUT pull it apart.. it fun and I do like knowing that everything is working mint. I like the bike so am looking forward to owning it for many a year... I consider it a good buy.

You might notice I'm not spending $$$ on the RD.. been putting that off and I hope this does not cost to much.

1 - Have the piston and gasket set... free
2 - $200 notes for a crank rebuild
3 - have reed valve just need new reeds
4 - New pipe and exhaust $420
5 - Bearings and seal as needed
6- plating and powder coating
7 - some new plastics where needed
8 - impala shaft and any other bits needed.

All done and it will be cool.. I hope to do this all for $1000 - $1500 then I will have somthing that I will know is strong and the amount I will use it will last for quite some time.
(also there is NO way the wife would let me spend heaps on a dirt bike so its dirt bike by stelth...!)

**Arronduke** · 27th April 2011, 00:51

Oh... I'm glad is winter... I've packed the BBQ away

(might end up living in my shed)

**Pornstar** · 27th April 2011, 04:12

Hey Aaron, that is a Boyessenn RAD valve, one of the greatest 2t upgrades ever made. My EXC has one. By the looks of your buy, that Kx has been a fast bike in its day, I also note Race Tech forks, no doubt there will be other mods. Nice bike.
I seem to remember that year kawasaki didnt employ the Boyessenn patented sub port mod that year, but you can get big gains from a port job putting them in, although it may have already been done.
As for the piece you found in the intake, holy shit, thats bad.
Dude if your happy to drop the cash, i can think of worse bikes to restore.
Cool bike in my opinion.

**Stormin Norman** · 27th April 2011, 13:11

Oh almost forgot found inside the reed valve... WTF so where is it from? Looks like a selector part but no idea.

That is part of the KIPS exhaust valve. It moves up and down with engine RPM and opens and closes the size the exhaust port. It will have no low end power with out this.

**scott411** · 27th April 2011, 15:05

it is a rad valve, reeds are not that hard to get for them, any shop should be able to get them from sportspro, if they can not pm me,

not sure what the random bit is, looks like a bit of a selector to me as well, but there is no way that could get there,

**orangeback** · 27th April 2011, 21:15

shit i think i've got one of those lying out the back of shed 2,

**Arronduke** · 27th April 2011, 21:28

Porn star and Scott... thanks for the advice on the RAD valve... will try and get some new reeds. They seem hard to find on the net or its just the sample picture does not look right... Always like this dealing with old shit... How do the real old timers get on with 50+yr old shit?

Stormin.. had a mate around tonight who used to own a KX500 ... mental rider on both dirt and road. But back to the point.... his guess was KIPS like yourself... which only confirms it to me. I have read on the net replacment parts are a no no

they are not made any more... anyone have an idea?

swingarm bearings... I am thinking a little grease and these puppies will be like new. Just cant seem to find the super grease on the net..

yep grease will kix these...! Ok new ones... lets add to the bill!!

Also my mate said to add grease nipples to all the roller bearings on the rear suspention.. anyone done this? sounds like good sense. Mental note... don't put them where they will interfar with other bits... you get my point!.. oh and Im good at that...

on the list of replacment parts so far... just to get started.. foot peg springs... they are broken.. and my bet is they are VERY important for trail riding LOL...

After a few beers on a Wednesday ... yep a few reds and a few Corona to wind down.

**Arronduke** · 27th April 2011, 21:32

Orangeback... haaa had to laugh how much shit have got got back there?

Still got the 750Kat i got from you... you know the one... the one i found a picture of on the net after you tried to burn it...

Still going good with the 1135 and wide wire rims... and your correct they are a bitch to clean...

**Arronduke** · 27th April 2011, 21:48

Just thinking... after my few rides over 3 weekend before I had to pull it a part... KX500 dude said it should stand in 1st gear piss easy with no clutch... and it did not. I thought it was like my RG500... people say f#ck man they did like 200km/hr on one wheel. And i know they don't.

So just maybe thats whats not making it fly down low, KIPS is rooted. I know there is some scondhand shit on Ebay UK at the mo for a small fortune..

Bill getting larger as I speak... mmm whats the wife doing right now (just lookng in the lounge... yep watching TV) now that not productive for my casues..... she needs a night job... that pays cash..

...... I'll share the income 90/10... casue its a partnership...or maybe I'll end up in the shed..,.

**DirtMad** · 28th April 2011, 08:15

Originally Posted by grantman

Arron you loser
You buy a bike from Graham and dont Check it over before riding it
The guy you quoted as having the machanical skills of a chocklate fish!

You ride like a little girl ...So go fast parts arnt really going to help you

I have had my mighty 1990 XR250 for 5 years and I just put petrol in it ...and still thrash you.

I look forward to reading your progress

PS:Graham & I looking forward to talking to Julie at your next BBQ

Yeah Hoops, I`d be having a chat to the dodgy prick that sold you that thing :-DDD

**scott411** · 28th April 2011, 10:37

Originally Posted by Arronduke

Porn star and Scott... thanks for the advice on the RAD valve... will try and get some new reeds. They seem hard to find on the net or its just the sample picture does not look right... Always like this dealing with old shit... How do the real old timers get on with 50+yr old shit?

net is not always the answer, these reeds are still available, ring us if you do not have any luck

**Arronduke** · 28th April 2011, 19:24

Reply from Boyesen... impressed.

You do have a Boyesen RAD Valve. The Boyesen RAD Valve for a 1992 KX250 is part # RAD12. This RAD Valve should have a “12” stamped into the side of the aluminum reed block.

The Pro Series RAD Valve replacement reeds (fiber glass bottom reeds & carbon fiber top reeds) are part # PSR-15, and the Power Reed RAD Valve replacement reeds (fiber glass bottom and top reeds) are part # RL-12. Attached are pictures of both reeds.

The price for part # PSR-15 is $66.95 USD + shipping, and the price for part # RL-12 is $47.95 USD + shipping.

RL-12 (Power Reed RAD Valve replacement reeds)