This pictorial guide will help you to assymble a KA24DE motor. It is to be used in conjuntion with a Factory Service Manual to guide you through your building experience.
First Make sure you have a nice clean area to work in. Cleanlyness is very important since any debris can cause problems at start up.

The block was bored and honed at the machine shop and hot tanked and is pictured with 1/2 of the crank bearings in and the main studs. (I got 3 main studs that were wrong so those are not pictured. Torque should always be done to manufactures specs.) The oil squirters have also been installed.

Here is the plasti-gauge on the crank bearing. You need to put one peice on each bearing and then install the crank and the girdle. (DO NOT SPIN THE CRANK AT THIS POINT.)


After you have torqued the crank in place to factory specs remove all the bolts and carefully remove the crank making sure you do not spin it. The flash on the next picture blanked out the plasti-gauge mark so I drew it in. You compare the thickness of the line it leaves with the marker pictured to see if it is within factory specs. Mine as you can see is .002 which is perfect factory specs. If your out of factory specs the block will need to be line honed and over sized bearing will need to be used.

Now that we know the tolerances are good we can lube the crank bearings and re-install the crankshaft.


Again my crank is picture with 4 bolts only. YOU MUST USE ALL 10 WHEN TORQUING THE CRANK IN.
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Yamaha Srx250