Tuesday, February 9, 2010

Crankshaft bearings and Expansion Chambers

Over the weekend, Paul dropped of a set of 3 crankshaft bearings ($273) that he ordered from Greece.[NSR250 crankshaft bearings and seals availability]
He also dropped off a set of pipes and the pillion peg brackets that hold them.

The NSR crankshaft is sold by Honda as a single unit. This is extremely painful and typical of Honda. Also, the bearings and seals are of non-typical sizes and not readily available. This is also fairly typical of Honda.
However, over time, people do find ways of obtaining the individual parts that make up the cranks and rebuilds of cranks become possible.

I had the seal on the inner bearing of the NSR crank fail on me when I was racing NSR's back in 1990. I had to buy a complete crankshaft assembly to fix it. Yeah, good one Honda! Luckily I managed to find a near new one second hand. ($900 instead of $1500 new at the time)

If I ever do receive my engine from Ok!Shon I hope to be able to rebuild the crank. I have the 3 main bearings, now I just need the big end bearings and the big end thrust washers. Paul is working on sourcing those too.

Also, Paul spotted a Kick Start Lever on TradeMe so I bought it for $40 + $5 postage.