SOHC.co.uk Forums > CB500/550

Primary chain wear 550 K1

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Murf:
Hi all
Sorry but yet another question
Just looking in sump and checked primary chain, it had some slack/play in it so had a good look in engine, it has the mark as shown in the photo on what looks like an oil way from or to the oil filter /oil pump.  The mark is small but would you say the primary chain needs changing, or is this common on these bikes.
Thanks.

Bryanj:
Yes to both, it is common and it goes need changing along with the 8 damper rubbers in the primary drive hub.
You will need one special tool and that is the generator rotor puller

McCabe-Thiele (Ted):
As it's an engine out casing split depending on the engine history might be worth fitting a pair of primary drive bearings. Bearings are a standard size so usually cheaper to buy from a bearing supplier than DS.

Lots of members here have done such rebuilds in the last couple of years so plenty of advice from Bryan & others here.

Murf:
Thanks
I had the feeling it was going to need changing as there was a fair bit of slack in the chain so thanks for confirming it. I haven’t had any experience with 550 before but I have done other bikes and the primarily chains are normally quite tight when new.   Thanks for tip about the primary drive bearings and the damper rubbers.  I have already got the top of the engine stripped so I guess now is the time to do it. I am going to do the cam chain so will be able to use an endless chain now. 
What about crankshaft oil seals I guess they should be changed and main and big end shell bearings checked. 
I have some rotor pullers but if I  haven’t got the right one where is a good place to get one.

Bryanj:
Get an oil seal kit from silvers and the rotor puller is a bolt that screws in and pushes on the end of the crank after removing the retaining bolt, where are you in uk?
In the past i have taken the crank into a local dealer and asked them, now i have the puller!
Make sure you dont mix up the shell positions and it is common to not have to change them if servicing has been done correctly.

Download the 500/550 manual from Ashs dropbox

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