Talk Morgan Forums Morgan Sports Cars Morgan Three Wheeler & Super 3 Bevel Box - How long did yours last?

To be fair, the emission standards for motorcycles (and thus the M3W are lower than that of cars, and surely the M3W could be lightened somewhat as it is. A rear sprocket of steel makes sense to me, but so does chain drive, given how they seemingly have had to narrow the rear wheel to make room for a wider belt,and apparently detune the motor to stop it ripping belts.

In any case, the wheel and tyre combo that is on it now is lighter than what was on it originally, simply because it's quite a bit narrower. A steel spline/rear toothy thing instead of alu makes sense to me. I honestly don't think the weight argument is useable in this case.

My rear sprocket was completely worn out and replaced at 4500 miles, the new one has a lip on each side and I've had no screeching from the belt since. No sign of wear so far in around 1200 miles .
I can't see any need for a wider rear wheel, the grip seems fine to me (in all weathers ) and as mentioned a wider one would just add more weight .

Sounds promising.




With that argument, it would be even better to have an even narrower tyre/wheel than the ones on the front. Less weight is better, regardless, right?


My point was that they had to detune the engine, and while at it, narrowing the rear tyre. A wider rear tyre would make it possible to plant more power, but since the narrowing of the rear tyre is a consequence of breaking belts, a wider rear tyre is not going to happen in the foreseeable future. It would also work against it: Either have less ground contact, a detuned engine, and intact belts, or have more ground contact, a full-power engine to deliver the power, only to have the belt break sort of defeats the purpose.

I don't believe the engine has been de-tuned. Hopefully we will find out once Krazy Horse get the dyno running.

What I'd suspect is that the power loss from front to rear has more to do with mechanicals need to reduce the peaks of torque to acceptable levels for the gear box etc.

I forgot to ask about the dyno when I picked up my car today , last time i asked I think they were still waiting for some software .

After I picked up the M3W at the dealer I went out for a nice cruise as the weather gods are blessing us. Bevel Box remains much quieter. The squealing from the belt is totally obnoxious. Took the rear cover off and really examined the rear sprocket and oh my. The wear is very visible and left to it's own devices, it will be fairly useless before the year is out. It will have to be changed to the newer one and I'm going to push my dealer on this one as well as modifying the front sprocket with a flange like the rear. The belt has never come closer than 1/4 inch to the inner flange and those visible teeth are still sharp and delineated while where the belt has made actual physical contact the wear is measurable. While I was there I hit the sprockets and inside of the belt with silicone and all the noises went away. Wonder how long that will last?

The silicone treatment lasted all of ten miles! Oh, but what a great ten miles they were!

It goes back as soon as arrangements can be made. damn

Try a slightly heavier - but light oil - and see how u go on with that!

Thought of that but it is merely masking the symptom and not addressing the problem. The piece is anodized, thereby making it harder but that coating may only be 5 or 10 thousandths of an inch thick and I've already eaten through that into the softer aluminum underneath.

It's goin' down....

Warbird,less than 200miles and the bevel box gone.you didnt ask your dealer if the company changed the oil before shipping it to the usa?how long did they take to replace it?how is it now?a different production?