Belt Drive-Which one?

bwolfie said:

I have tried email and calling many times to QPD. They never respond/answer. Aparently they do not want to sell their products. They have had an ES conversion for years, but if you can't contact them what good is it.

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I rode a friend's bike with one installed and have to say the clutch engagement was very smooth and a lot nicer than my stock Norton with bronze plates and ATF/chain primary. I know he's had his setup for a long time. But if you can't get through, that makes it hard to get!

I was going to call because I couldn't find a price on the website. But I have not.

Mark

I have had both Norvil & Maney on my 850 , both work well .
If you get one , buy a spare belt with the kit & replace it when you use the spare .
Also I would highly recommend a second g'box adjuster .

Norton gave a lot to Harley Davidson so might get something form them. There are other teeth forms than we'd had pointed out so far, though who'd spend on a Commando like it was a Harley.

http://evil-engineering.com/

Maney.

Next question.

The Hobot offering up there looks like a mouse treadmill!

Here's my current status. Think I might be doin a gearbox mainshaft and outrigger mod also

When it rains....you get wet

http://www.youtube.com/watch?v=H7dcTOOi ... ata_player

Dkt26 said:

Here's my current status. Think I might be doin a gearbox mainshaft and outrigger mod also

When it rains....you get wet

http://www.youtube.com/watch?v=H7dcTOOi ... ata_player

Click to expand...

That one doesn't look too bad. Not great, just not too bad.

PV
Looks like its gonna throw the chain sometimes.
Is it possible the clutch drum could have been bent?
The mainshaft is only 12-18mths old. If it is the mainshaft that is going to be a pain in the ass
Can seem to have a win at the moment

tricatcent said:

The chains that are used on motorcycles are not rated for the RPM or torque used on a motorcycle either. Not in the industrial design charts anyway. Probably the chain ratings are even lower than the belt ratings.

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Thats also true at least for the old 428 chains in the earlier twins. I have never checked the Commando chain.

But primary chains have always given me a warning when they were not happy which is why I would use them for every day stuff. Belts just go with no real warning.

Another belt advantage for a race bike is that they are more efficient at transfering horse power. If you imagine a chain spinning at high speed the centrifical force wants to force it into a perfect circular shape. But the sprockets pull it back into the oval shape. That takes energy which is not going to the back wheel. With a big heavy chain at high rpm that can be a lot of energy.

A belt is a lot lighter therefore energy required is less.

Dkt26 said:

PV
Looks like its gonna throw the chain sometimes.
Is it possible the clutch drum could have been bent?
The mainshaft is only 12-18mths old. If it is the mainshaft that is going to be a pain in the ass
Can seem to have a win at the moment

Click to expand...

I grant you, the chain may be a little loose but not that bad.

As far as the clutch hup goes, you have to piece together in your mind what is going on here, You have this large spinning mass riding on a bearing in the back riding on a small shaft (in comparasion) extending out from a bushed sleave. You are going to have some movement.
I think it looks OK. I have most certainly seen a hole lot worse but yours looks average to me.

Cheers mate
I am going to strip it in the morning and check if the mainshaft is true without load on it with a micrometer. I suspect the clutch bearing may be fragged also.