1988 Suzuki DT140

[GooganGuy]

Just picked up a 1988 Suzuki DT 140. It runs, but I'm not familiar with motors this big let alone Suzuki's. The seller said I should replace the whole water pump assembly including the impeller. Is there anything else I should replace right off the bat? It sounds good for an '88 and surprisingly it doesn't smoke very much at all.

Thanks!