Ultra major surgery - Big arm gone bad

Hi!

Brief history, i was chasing an r6 for some 20km or so cruising at speeds of 150~160km/h on very very short gearing - 58T rear sprocket, so we can imaging i was revving my pretty little 2kr engine near the limiter <!-- s:biker4: --><img src="{SMILIES_PATH}/th_Biker_4.gif" alt=":biker4:" title="Biker 4" /><!-- s:biker4: --> <!-- s:bigmachgun: --><img src="{SMILIES_PATH}/th_Big_Machine_Gun.gif" alt=":bigmachgun:" title="Big Machine Gun" /><!-- s:bigmachgun: -->

then things went wrong, my engine started to develop a loud noise but was still running and had some fight in it, plus smoke was belowing from the exhaust - the kind you see from fried piston rings.

The noise reported is Very similar to this thread : <!-- l --><a class="postlink-local" href="http://fzr250.com/viewtopic.php?f=2&t=3764">viewtopic.php?f=2&t=3764</a><!-- l -->

I've already conducted Thoracic surgery to the specimen and low and behold. below are the results.

Valve clearance :
reading as 1-2-3-4 in mm
exhaust : .33 .33 | .234 .234 |.35 .35| .48 .48 | - nominal values .20~.30mm
Intake : .279 .279 | .229 .260 | .09 0.00 | .17 .14 | -nominal values .10~.20mm

Piston ring clearance : .9~1.00 mm - beyond specification <!-- m --><a class="postlink" href="http://attachments.fzr250.com/Dave/chapter05c_pistons.pdf">http://attachments.fzr250.com/Dave/chap ... istons.pdf</a><!-- m --> - page 6

No : 3 piston : huge up-down play est 2~3mm - suspecting bigarm bearing toasted <!-- s:angel: --><img src="{SMILIES_PATH}/icon_angel.gif" alt=":angel:" title="Angel" /><!-- s:angel: -->
if engine is cranked (via the stator with wrench) when piston 2 reaches TDC, piston 3 looks to be missing a few mm of height

i have yet to open the crankcase. unfortunately, Im the kind of asian that is not able to read japanese <!-- s --><img src="{SMILIES_PATH}/icon_biggrin.gif" alt="" title="Very Happy" /><!-- s -->

I was after if anybody knew the diameter of the Journal(Crank pin?) the bigarm connects to.


I also wanna share the seller i found selling the goods.
here is his message to me for the parts :

the total price is US$138.5


hello, my dear friend, this is the price:
Piston + Piston rings 4pcs / set : US$45
16pcs valve seals : US$10
Crank shaft & Connecting Rod bearing 20pcs/set :US$30
clutch plates 6pcs/set :US$12
oil filter 4pcs/lot : U$12
The total price is US$109, this price is the lowest price, no any discount.
The shipping fees is US$29.5 Via EMS

<!-- m --><a class="postlink" href="http://www.aliexpress.com/store/1315288">http://www.aliexpress.com/store/1315288</a><!-- m -->
<!-- s:ditto: --><img src="{SMILIES_PATH}/th_Ditto.gif" alt=":ditto:" title="ditto" /><!-- s:ditto: --> heres the link to the supplier - lots of good stuff.

I was shocked at the Prices, these are replacement (non oem) parts that im really finding hard to resist. i bought my engine for 500usd roughly. most likely if chose to go oem, it would be worth more than how much i bought the engine.


please please. those measurements, i hope you know of, i can place the orders until i know which ones i'll need - or if i need to visit the machine shop to have the journals resurfaced. <!-- s --><img src="{SMILIES_PATH}/icon_mad.gif" alt="" title="Mad" /><!-- s -->

Oh btw - any inputs on ceramic resurfacing? a ceramic augmented 1hx engine - bank breaking very awesome 250. aye?

here is an example : <!-- m --><a class="postlink" href="http://precision.ph/ceramic.htm">http://precision.ph/ceramic.htm</a><!-- m -->