KTM 450 sxf lunched

[crazyxr250rider]

If the Crank is ok go ahead but do you want to risk screwing your new cam in a munted head???

[kezzafish]

If the Crank is ok go ahead but do you want to risk screwing your new cam in a munted head???

It sucks but i'll take that risk because i want to ride, the cam siezed in the journals and the lobes ground off because the squirters were blocked. therefore as long as the oil doesn't get into the same state as it was and block the squirters the cams will be fine. If the engineers trick with the head fails then i'm up for a new head which i should have done anyway so my loss is only the engineers bill (280) and a gasket set. however, it is much more likely that it'll run and run and run

[crazyxr250rider]

Sound good just dont be a cunt and sell it like it is ive fixed a few "Mint" Mx bikes in the last year..... Whats he doing with the journals?, are they completely gouged out or just starting to pick up???

[kezzafish]

Wanna know the engineers trick?
Most of the wear on the head was not actually on the journals in the head it was on the journal caps that hold the cam shafts in place, these suffer the most damage because the cams are always being forced upwards by the valve springs. KTM don't sell the caps seperately because they are individually matched to the head for correct clearance. So, i got the engineer to plane off a mm from the bottom (flat) surface of the caps and re bore the holes for the cam shafts and also clean up the journals. I hope it works

[kezzafish]

i don't think the journals are too bad??? do you use that plasti stuff to chech tolerances?

[crazyxr250rider]

Fuck thats cleva just make shure you re-shim the valves afta its done a couple of hrs after the cam and valves bed-in

[crazyxr250rider]

Never used it aye dont know if it works or not...

[kezzafish]

Got my head back from the engineer, i plastiguaged the cam shaft in the journal and it comes up quite loose!! should be a max of .055 according to the manualbut it came up to .150 they're fukken rough cunts man. You can feel the shaft jiggle. I'm gonna run it and see how it goes. was up till 2am this morn putting bottom together, with the damaged barrel sanded and new piston installed. (there's still some lines down the bore but hopefully she'll be right) have put valves back in head etc, i've measured up valve clearances and have just gotta order a couple new shims which will hopefully be in stock at KTM and arrive tomorrow. All going well the big Karapoti test will be on sunday. will post on how it goes

[kezzafish]

Shit man $5500NZ for parts alone suppose you have to add labour to that as well if you couldn't fix it yourself. Probably be $7000 if you had to pay for an NZ shop to do it. Jeeper's that's more than my 2 bikes are worth. Damn near what I'm paying for my new bike. Jeepers I'm sticking with 2 smokers that's for sure! tommorths total bill for near everything was probably only a grand.
Boy that's a scary story! You've just convinced me all my 2smoker justification theories are 100% correct.

BTW hope you get your tools! If you do all the work wouldn't cost to much for the shop to time the cams would it??

Super good cunt at bike shop lent me the special tool in exchange for a box of heineken!!

[kezzafish]

Cripes, your a keen man! ha... mad bugger!

I was gonna go on that one too but ended up at taikorea bike park just up the road for a few cross country laps. It was bloody well pissing down all day, the sand was soaked and the pits were flooded. Had a good ride though ... man wet sand's a bitch to ride through sometimes, shouldve seen they guys on the mx track there all over the place like a mad womans shit.

Good luck with the kato ... im sure youll figure something out. see ya back out karipoti then.

Yeah mate see ya on sunday, meet you at the puddle!!

[barty5]

Got my head back from the engineer, i plastiguaged the cam shaft in the journal and it comes up quite loose!! should be a max of .055 according to the manualbut it came up to .150 they're fukken rough cunts man. You can feel the shaft jiggle. I'm gonna run it and see how it goes. was up till 2am this morn putting bottom together, with the damaged barrel sanded and new piston installed. (there's still some lines down the bore but hopefully she'll be right) have put valves back in head etc, i've measured up valve clearances and have just gotta order a couple new shims which will hopefully be in stock at KTM and arrive tomorrow. All going well the big Karapoti test will be on sunday. will post on how it goes

if they loose why not take a tiny bit more off the bottoms flat surface and fine wet and dry should be enough looking at those figures?

[secondfield]

Yeah - probably not this sunday, gotta do fathers day with the father in law , thought id get out for a ride, but now im a dad better sort out the whanau buisness first eh. definately next weekend. Possibly even wednesday arvo or so, im off work for a couple of weeks. gotta mate with a 450exc who may take the day off too. PM me sometime, well sort something out. Good luck with the repairs. Sounds like a real fucken number 8 wire job, but with a bit of luck they can last for years....

[FlangMasterJ]

I'm keen to head up the Karapoti this weekend. Might see you up there.

By the way when is fathers day?

[kezzafish]

if they loose why not take a tiny bit more off the bottoms flat surface and fine wet and dry should be enough looking at those figures?

Nah, you'll never get .1 of a mil off accurately across a flat surface with sand paper, it needs more machining

I'm keen to head up the Karapoti this weekend. Might see you up there.

By the way when is fathers day?

Cool, might see ya although it's lookin a bit less likely 'cos i did nothing on it last night ended up drinkin Jack's and talking shit. If i can get the moty back in da frame tonight and everything works then i'll be there sunday, are you on a 250 sxf? Fathers day is Sunday

[kezzafish]

It runs, hurrah. there's a high pitched noise coming from the motor. I think it's always had this sound but it just seems louder. It's also quite tight so may quieten down once run in. We'll see how long she lasts