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CB550k1 US Import - UK registration

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juitz:

--- Quote from: Bryanj on February 19, 2023, 03:14:38 PM ---Check if the rocker shafts have oveled the holes in the cover

--- End quote ---

Hi Bryan, could you clarify a bit? Not sure which holes to check 😋

juitz:

--- Quote from: Laverdaroo on February 19, 2023, 02:04:01 PM ---See, told you I was no expert ;D ;D

--- End quote ---

All good Roo, to be fair I was leaning the same way which is why I posted 😃👍

Oddjob:
The holes the rocker shafts go into, doesn’t usually happen on the 550 as the shafts are pegged and all one piece but on the 500 which doesn’t have them pegged and are in 2 pieces it’s been known for the shafts to spin and wear the holes in the camcover oval.

Bryanj:
There is a service bulletin about it in the 500 ones in alladins cave but what it is the rockers pivot on shafts in the cam cover and those shafts can spin wearing th e shaft holes in the cover oval allowing the tappet clearance to wander so slide the shafts out and check the cam cover, the later K3 covers had a mod with cotter pins holding the shafts

Orcade-Ian:
My 550 F1 USA with engine number starting 112 still has the two piece shafts (one for each rocker arm) and no pegs. According to CMSNL parts list for USA 550 F1, change point was after 113 something. 

Ian

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