Can you explain? Looking at them it seems a toothed belt off the end of the crankshaft could be better because of a lower tension and less strain. What was the reason for a two belt system? Most of the time in a drive system it is to increase speeds with limited space or reduce stresses on the primary drive.The single belt is the best one
There’s a guy called Ray Coleman over on one of the Facebook groups - I haven’t seen him on here at all.
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He’s built the best looking supercharged Commando I’ve seen - looks way more factory than the Drouin in my opinion, plus it’s off a modern car, so they’re cheap and you can still get parts.
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yep i agree i have a twin belt drouin on the shelf its a beautiful ornament ,but an aisin 500 on the bench, but time,knee caps and money are all against me at the moment,plus three customers bikes cheersThere’s a guy called Ray Coleman over on one of the Facebook groups - I haven’t seen him on here at all.
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He’s built the best looking supercharged Commando I’ve seen - looks way more factory than the Drouin in my opinion, plus it’s off a modern car, so they’re cheap and you can still get parts.
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The twin belt type does use a toothed belt from the crank,the secondary belt is thin and flat,I think this second belt causes most of the problems with alignment with the sheer speed the belt,also the bearings trying to cope with 40,000 rpm at the impeller and the bearings are no longer made,the lake fuel injector was the widowmaker with the flat slide hanging up through the suction caused by the supercharger,the single belt one seems better but I don't think you could run a toothed belt because of the small diameter of the pulley at the super charger end,but a lot has changed in 45 years there's probably better belts out there now,and large flatslide carburetor to replace the leaky fuel injector etc, cheers
The bearings should still see that rpm with a single belt? The seller did say the secondary flat belt slipped
Besides complexity and bragging rights, what does the Drouin do to the engine's reliability? Do you get an exciting afternoon or can you stir the adrenaline pot a bit longer?
Hi driving the blower of the timing side turns it backwards. So is driving the bottom rotor.the way they were designed to be mounted.There’s a guy called Ray Coleman over on one of the Facebook groups - I haven’t seen him on here at all.
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He’s built the best looking supercharged Commando I’ve seen - looks way more factory than the Drouin in my opinion, plus it’s off a modern car, so they’re cheap and you can still get parts.
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