SOHC.co.uk Forums > CB350/400
Cam chain tensioner question?
McCabe-Thiele (Ted):
It's pretty cold here so I have set the Dynamic Iginition Timing - it starts much easier plus nipping up the manifold bolts has stopped the exhuast popping & banging - nice steady idle at 1200 rpm when warm.
At present the cam chain tensioner bolt is in just nipped up position from when I first released it after fitting the top of the engine.
There is no chain clatter do I need to do the adjustment as per my manual with the engine running at 1200 rpm?
Only asking as it looks like a recipe for new burn marks!
Could it be overtensioned if I do not now adjust it at 1200 rpm?
K2-K6:
Risk of being overtight shouldn't happen as the original adjust simply uses the designed spring tension to achieve correct position. Effectively it can't exert too much pressure onto the chain from it's design leverage ratio.
It's very low risk to leave it alone right now, but Bryan's method appears very logical to set it with. It should in time and mileage settle in further as the new chain runs on it's guides etc, but that's a pretty slow process.
McCabe-Thiele (Ted):
--- Quote from: K2-K6 on April 29, 2022, 04:59:42 PM ---Risk of being overtight shouldn't happen as the original adjust simply uses the designed spring tension to achieve correct position. Effectively it can't exert too much pressure onto the chain from it's design leverage ratio.
It's very low risk to leave it alone right now, but Bryan's method appears very logical to set it with. It should in time and mileage settle in further as the new chain runs on it's guides etc, but that's a pretty slow process.
--- End quote ---
I did a search on the site for cam chain adjustment and found nothing much what is Bryan's method I must have missed it?
K2-K6:
Just "leaning" on kickstart such that the crankshaft is bordering on turning, this should pull all the tension side (front of block) of chain tight between the crankshaft and camshaft sprocket, while holding it there loosen the adjuster to let it set (it's setting the backside chain run) the tensioner blade as close as possible to no slack.
That's my interpretation of it, apologies to Bryan if that's not what he intended.
McCabe-Thiele (Ted):
I like the sound of that - especially if it okay done on a cold engine. - reads very logical. 👍👍👍
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