My KTM is sad

[camchain]

That's a rotten thing to have happened tommorth. Hard not to think that guy you bought it from knew something was off about it, especially as he's apparently so willing to cough up some dough?
Probably way off and only guessing here, but could very old fuel sitting in tank possibly have anything to do with with this sort of damage? Maybe he got a partial seize when he started it after sitting a long time. Could crank still be OK? Pull the barrel off. On the plus side, if it was a lunched 4 stroke you'd be looking at a much bigger repair bill. Don't let this get you down. Thankfully 2 stroke is a simple engine. You'll be back up and running soon.

[tommorth]

I drained the fuel and carb as soon as I got it home for that reason .When I got there he started it up and fanged up and down the street doing wheelstands etc so I really think he is genuine
I have the barrel off and the rod is very stuck piston looks fine below the top ring which is jamed wont be sure about the crank till I split the cases.Looks like a rodkit at least

All the bits is why i didn't buy a fourstroke although I have rebuilt a fourstroke and not a 2t so maybe this wont be so bad .

At least once its done it will be sweet for ages and I'll be sure that its good.

[cheese]

I foudn a second hand crank on eBay???

http://cgi.ebay.com/ebaymotors/2002-...mZ140258664956

[Reckless]

Doubt very much you need a new crank! Just a rod kit. The most important thing is to get the two halves set up correctly once the rod has been put in. They have to be the correct width apart and lined up with special measuring tools. There is an art to that. Well when your blueprinting a kart engine there is! But everything else is OK to do yourself if your confident enough.

Bummer man! Its not to often a 2 smoker shits itself like that! Mostly when you change a piston or ring you would check the rod and notice it needed doing. Thats very bad luck!

[idleidolidyll]

lucky it's a 2 stroke; it'll only cost a few hundred to fix probably.

If that were a 4 smoke blow job you'd be looking at thousands

[crazyxr250rider]

I rebuilt a 250sx crank for a mate was easier than i thought (prob did it the wrong way but its still going....) pressed out the old pin, threw old rod into paddock with rusted out holdens and a bedford truck, cleaned the webs, put new pin in freezer and webbs in boiling water,placed one web in press and installed new pin into web, installed new con rod, thrust washers and big end bearing then pressed on other web as straight as possible with two .9mm feeler gauges in between the web and thrust washer to give it some clearance then I stuck the crank in the some v-blocks to check if it was straght,it wasnt (time for a cup of tea...). On advice from this site I held the crank in the Lathe wacked it with a big soft hammer on the bad side then rechecked in v-blocks with a dial gauge,sweet as was going the next day!

[gammaguy]

which is why we love two strokes....

the four stroke guys would still be measuring their bearing clearances and valve stem wear,while we are out RIDING!

[barty5]

which is why we love two strokes....

the four stroke guys would still be measuring their bearing clearances and valve stem wear,while we are out RIDING!

then they catch up and pass yah

[crazyxr250rider]

Yea, im over rebuilding my YZF so often.
Getting me a RMZ450 when the YZF sells and a RM250 01 for a hack when I get the money for the XR.Holy shit its guna be Poozukis all round!!!

[secondfield]

Welcome to RMZ fourfitty club bro... the most fun ive ever had on two wheels (one, more often than not!). Seems like guys are riding these things to the edge.

NZ mx1 champs (Hurley)
NZ enduro champs (not even an enduro bike!)

and good ole' Paul Whibley smashing through the GNCC series without the need for a flywheel weight!!

[tommorth]

received some prices today
5233 000 5300 Cylinder $1143.98 5233 013 7000 Cylinder Head seal ring $12.70
5233 700 1200 Intermediate Flange $169.99
5233 704 6100 Intermediate Gasket $9.43
0770 440 030 O-Ring $5.96 x2
5233 706 2144 R.H.S. Control Shaft CPL $69.27
5233 706 1144 L.H.S. Control Shaft CPL $69.27
5033 000 6000 Cylinder Head $171.20
5233 003 7000 Cylinder Head Gasket $15.58
5033 003 5075 Cylinder Base Gasket $9.24
5233 001 5000 Conrod Kit $475.36
5233 000 7000 l Piston Kit $258.29
'' '' ll '' '' '' '' Depends if the top of the piston has one notch or two


0770 250 020 O-Ring $ .80
0760 324 564 Shaft Seal (rhs) $17.42
0760 253 570 Shaft Seal (lhs) $20.97
5033 008 2000 Shaft Bearing (rhs) $101.46
0625 063 055 Shaft Bearing (lhs) $41.00

5230 500 9100 Exhaust Pipe $840.10


prox rod kit is $238 so I think I'll go that way instead of genuine
cylinder and pipe prices are because my bore is damaged cracked both sides of exhaust port and dented around ports. So I wanted a a cylinder price for comparison and it turns out the 03 cylinder has superceded my one and means useing a different pipe lol. I think ill get mine welded and replated

Has any one used this place http://www.engineservices.co.nz/index.htm
would be nice not to have to send it to the states

have heard good thigs about those rmz450s

[barty5]

i was going to use them for my yz125 im selling but it was cheaper to buy new from the states they wanted 650+ to replate if your not in the bike trade and 450 + if you were which i can be when needed let us know if you do use them should be able to get it done at the cheaper price for you.
I would check prices in the states try some on line bike shops shipping is only bout an xtra $50i I was quoted 800 and some for new barrel ended up costing 250 US plus fr all up was about $330 nzd just keep orders under $400 or you have to pay duty split your orders up.

[tommorth]

barty thanks i might take you up on that have sent off a couple of emails for prices
us chromes website says $237 us or about $340 nz plus postage to strip weld and replate a bore im waiting for a reply from langcourt and the place in chch

have put up a pic off the bore but its almost impossibe to see the cracks they are very small

[Rupe]

0760 324 564 Shaft Seal (rhs) $17.42
0760 253 570 Shaft Seal (lhs) $20.97
5033 008 2000 Shaft Bearing (rhs) $101.46
0625 063 055 Shaft Bearing (lhs) $41.00

Hey barty, would this guy be able to get these from a bearing shop???

Worth trying, as it saved me a few $$$$, I used Auckland bearing, diana drive, glenfeild.

[telliman]

man i get nervous when reading this thread!