i have a knock from the bottom end of my 1993/4 water cooled 750 gsxr,striped the engine and found it was coming from no,one cylinder con rod / crank connection.so it needs knew shells.when i looked on the alpha sport web site.it gives 3 different colored shells.how do i get the rite ones to fit.i guess there all different sizes.
There are four numbers on the crank, and each rod has a number on the edge near the part line. Look up the table in the manual, and you have the colours you need . . . assuming that there is no wear on the bearing surfaces, of course!
hi,is the plastigage the same as a micrometer.and do i measure the diameter or the circumference of the crank.and then does the measurement dictate the colour of the shell...thanks for your help and patience....
Plastigauge only checks the clearance between the bearings and the crankpin after asssembly. The numbers on the crankshaft and the conrods (as I mentioned before) relate to the diameters of the crankpin and conrod bore (respectively), and they have been marked by Suzuki. The service manual details all this. I can help if you send the number code on the crank (eg. 2222), and the numbers on the rods in order of cylinders 1 to 4 (eg. 2222). I can then reply with the bearing colours required in order of cylinders 1 to 4. BTW the crankcase and crankshaft are marked with ABC to denote sizes, and the same procedure applies.
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Last edited by wombat58; 11-04-2012 at 01:31 PM.
Reason: typo
if the crank has any kind of wear/damage from the previous "shells", it will just destroy the new "shells" which are called rod bearings - with-in minutes of start up. Also, not to be a complete d1ck but if you dont know what plasti gauge is, then most likely your mechanical ability isn't sufficient for rebuilding a motor.
well thanks for your help.and after doing some sussing out.and down loading a service book.its pretty straight forward.not quite rocket science.the crank is within its tolerances.and the plastigage hair shows the Shel's are worn.so i will replace.experience wise.not to much on Suzuki's.but quite a bit on ducatis and british bikes ....
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