yep first track day after freash rebuild and mint tuneup

3 laps in coming from top of 6th gear (at 12000 rpm)
down to second gear into hair pain,, just coming out noticed
a rattling sound then i started to pull over, the power died and when the bike stope'd the rpm died out, i try to kickstart but the leaver wouldnt move, so i assumed (in a gutted state) that it seized..


took bike back to work and droped the bottom cylnder , luckily there was no damage to cylnder sleeve and there was oil also in the mix,

although when looking in the head TWO BRASS PIECES came out along with
shards of metal, the piston is also damage around the edge but rings seem okay, also there was a E-CLIP in the head also,

the connecting-rod has no play (foward backward) but does have play to the right side as it looks like a spacer thingy is missing beside the con-rod

im guessing its the thrust bearing washer?? cause my mechanic said that thats the only thing coper or brass looking in the engine

NOOOOOooooooo! after about 3-4 thousand bucks this happens on my third lap at the track@!.

anyone know wat i should do, iwhere i should look,

im really screwed guys. any help much appreciated.

Looks like your crank is done. I guess im a lil bit ok than you as i was on my 2nd session when my crank blew up

yeh, gutted man, oh well im due for full licence in 2-3 weeks so looks like i might graba '08 or something, just so i know something aint gunna blow up *touch wood*

could sell it as a 300 kit needing pistons and rings * are cheap *

with only 2500kms on mint as cylnder heads it will cost half the price as new to get a 300 kit

That sucks. Any chance of some pic's of the damage and the bits specially the E-clip.

NSR Wayne had the same problem on his 18, a thrust washer broke up and the broken bits got dragged up on top of the piston.
Not good news, i'm gutted for you

CRASH, BANG, WALLET!!!!!!!!!!!!!!!

That SUCKS. What was the outside temp? I had a similar insident only mine happen in sixth and locked the rear wheel. Mine was a jetting mistake and I got away with a hone and piston. You can't run it without a thrust washer though.
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1995 A kit TZ 250
1994 Rothmans NSR 300sp SOLD
1998 RM 250 freestyle/motorcross
1998 Meathanol burning CR 500 AF super retard/motorcross/sand dunes/play bike

I feel for you.

Have you beaten it with a stick yet?
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If I have to take the carbs off once more...

StephenRC45 wrote:I feel for you.

Have you beaten it with a stick yet?

You been watching Fawlty Towers again Steve?

meh its okay,. my fault running a new top end on a 55k bottom end

well the 3 laps i got in i gave it heaps,

guna get a 08 600rr

rodney007 wrote:guna get a 08 600rr

I'd rather break my legs again.
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Please do not PM me technical questions, if you can't find it on the Forum start a thread

its okay.

i have k4 gsxr600 now

My sincerest comiserations...

It would perhaps have been wise to have had the crank rebuilt and balanced etc. before pushing more power through it. Cranks are a service item, they don;t just spin forever without attention.

I reckon you should fix up the NSR. Do it properly and it'd give you far more fun and satisfaction than the Gixer ever will. The occasional engine blow up is inevitable (on any bike) if you push them a bit. Fixing them up better than before is an important part of the fun and satisfaction in my book.

Wb

What are you going to do with your NSR now.

fixing it, should be up and running in week or so

thanks guys