1984 250r crank noise

[Dino]

hey all. my 84 250r is making a pretty ratty sound coming from the bottom end. i see bearing and seal kits on eBay for these but no crank assemblies. will this kit possibly fix my problem or would i probably need a new crank. i know the previous owners of this thing and its been rebuilt plenty of times. also the owner before me weighed about 300 lbs. and ran a pretty lean gas/oil mixture. any information would be very helpful. thanks

[Air-cooled-R]

if it sounds like the piston's slapping around, the lower rod bearing may be going out. If you dont fix that before it blows out completely, you'll probably looking into a new bore and piston. Check out Hotrods, they sell a kit to rebuild your crank w/ new bearings, rod, etc.

[greenhuman]

Does the rattle go away a bit when you pull the clutch lever in? If so, its normal. Its just the straight cut gears on the clutch rattling on the crank gear.

[Dino]

I have another jug that was freshly bored .20 over to replace the 72mm one on there. So I'll try the main crank bearings and seals, and connecting rod kit with a new piston and hopefully be back on the trails soon. Now if i could just replace those bent forks. Thanks for your help