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Doms CB550F1 project
Bryanj:
Yes its pitted but seen worse, if you are going balls outfull race needs replacing, if, like most of us, it will do maybe 2,000 a year it will last forever.
The followers are hardened the lobes are not
Oddjob:
If worse comes to worse you can always get the cam redone at Newmans. Maybe have it re-profiled to suit the engine better, a few degrees more overlap, a few degrees more duration for example really wake this engine up midrange. Cost is the same as just having it done to standard. It's about £100-120 plus VAT plus P&P.
K2-K6:
Interested to see what the rocker faces look like. Wear from these component will often be too small (sub 5 ~10 micron ) to be trapped by conventional oil filters, that's what makes the "tramlines" in plain bearing surfaces by getting trapped in soft part of those bearings next time round, crankshaft assembly too.
Originates in oil condition during previous running, too long interval and fuel dilution. Cam lobe and followers always show this first due to highest pressure exerted on oil film at this site location.
DomP:
I quite like the idea of a bit of cam reprofiling, if I find everything else to be in good order I may go down that route. In terms of top end gasket and o-ring kits, where is best to get them?
Oddjob:
Always try and source a genuine top end gasket kit. Quality is far superior. Not exactly an abundance of them these days though.
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