Does anyone use a torque wrench to tighten the engine sprocket and clutch basket? If so what should i tighten it to on my '35 Es2? Be nice to have some idea instead of just guessing as I usually do. Many thanks .
By coincidence I had to answer the same questions while refitting my RGM Belt Drive back onto my 650 Manxman.. I was being cautious as in the past I always torqued both crankshaft and gearbox mainshaft nuts up to 70 ft-lbs as suggested in my Haynes Manual. But had been warned not to do this on a Commando clutch as it risked breaking the very flimsy circlip that sits behind the basket. So I consulted several people who I thought should know the answer and got back two differing replies.
For an AMC clutch it was still go for 70 ft-lbs but for a Commando 50 ft-lbs is plenty. The latter advice coming from Andover Norton. Now my belt-drive clutch is really a Commando item adapted for an AMC gearbox and does not have the aforementioned circlip as part of the workings.
So I compromised and torqued the beast up to 60 ft-lbs. The crankshaft still got 70ft-lbs.
I did my AMC clutch up as recommended and destroyed the spider (an original) .There are stronger ones availiable from RGM which have a better detail ,but I will not be using the recommended figure , I think 45/50 ft lbs is plenty with a bit of nut lock and the tab.