Where should the timing marks be when replacing a timing chain on a honda cbx 250 engine

yes it is safe for you to remove the tensioner unit whilst the engine is off however Iam inclined to think from what you describethat you are due for a new timing chain

you probally need to retime it find top dead center on copression stroke and aline your cam then put your chain on that shoul do it did you take the cam chain off or loosen your tensener? if so you need to re time it

normaly tensioner wears first. i would replace both to ensure you dont have do the job again when the chain goes beyond its wear limits

you can find the exact replacement parts at your local Honda dealer. Also check ebay and other aftermarket parts suppliers for a better deal.



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Dit you have heard the engine running before? Has it then a 'chain' noise?
I've often had a CBX with an defective camshaft chain spanner system ( worn clickets )
The chain can than climb over the tooth of the pinions and get stuck between the pionion and the engine carter...

Sometimes it came loose with a backward turn of the crankshaft.

Very rarely, I've heard of a defective gearcase. 2 gears at the same time. But then, the crankshaft will turn if you pull the clutch lever...

Hi .......... It's only held in place by two set screws, you don't need to strip engine.