11 replies to this topic

[joss]

I have not been in any other busa minis but I got to say my chain is bloody noisy I have bought a chain alignment tool and will see if this makes it quieter if not has anyone got any ideas out there?

[Tahiti Joe]

Earplugs? 

[edsmini]

Scot oiler fitted ? Those chains need oiled

Is the chain tensioned properly?

Buy big fu@k off earplugs joss

Ed

[joss]

I carry an addition 1kg of ear wax without the use of plugs anyway point taken

 

Joss

[Pete649]

Pardon?

 

Actually, the whole engine/drivetrain is as noisy as anything. Can you hear the chain noise over the engine? Can you hear anything over the engine? 

[R1mini]

I've been in R1minimagic's R1 mini when he had it, I'm amazed you can here anything other than the scream of the induction roar. Your chain must be horrifically noisey to hear anything above the engine. One thing on the mini the chain was out of aligment by 7~8mm from memory, but this was spotted in the build so it was never used like that

 

Cheers

David

[edsmini]

i always used good earplugs joss as the noise is dreadful if you are out for a blast  is the mini back together and on the road?

 

Ed

[Tamworthbay]

You have probably done this already, but just in case..... It's worth checking that at least one of the sprockets has an odd number of teeth. If both are even, the same link hits the same tooth repeatedly and can cause funny wear patterns which result in high wear rate and a noisy chain. With an odd number it hits every one over time. Most primary gears are odd numbers anyway, but just in case.....

[edsmini]

You have probably done this already, but just in case..... It's worth checking that at least one of the sprockets has an odd number of teeth. If both are even, the same link hits the same tooth repeatedly and can cause funny wear patterns which result in high wear rate and a noisy chain. With an odd number it hits every one over time. Most primary gears are odd numbers anyway, but just in case.....

the sprockets are different sizes which means that the chain will hit every tooth anyway?

 

Ed

[Tamworthbay]

You have probably done this already, but just in case..... It's worth checking that at least one of the sprockets has an odd number of teeth. If both are even, the same link hits the same tooth repeatedly and can cause funny wear patterns which result in high wear rate and a noisy chain. With an odd number it hits every one over time. Most primary gears are odd numbers anyway, but just in case.....

the sprockets are different sizes which means that the chain will hit every tooth anyway?
 
Ed

Not if they are even numbers, they always hit the same set of teeth. E.g a 10 and 20 tooth. Chain link 1 will hit 1,3,5,7,9 on sprocket one but never 2,4,6,8,10 etc. it is well known on motorbikes but could be missed if getting bespoke sprockets made up. We use chain drives on our electric endurance race cars at work and it causes a nightmare for selecting ratios. We tried running a pair of evens once and the noise was unbelievable after only 70 miles, the chain was scrap after 110. We normally get 1000+ out of a chain. We run carbon sprockets, but steel ones do the same.

[joss]

O yes Ed it back on the road and runs well I have ironed out most of the issues but my concern was the chain noise,  Yes I can here the chain over the engine at low speed but this must be normal (just being a fuss pot) but I may in the future look at a diff alternative.  

[Minja]

You have probably done this already, but just in case..... It's worth checking that at least one of the sprockets has an odd number of teeth. If both are even, the same link hits the same tooth repeatedly and can cause funny wear patterns which result in high wear rate and a noisy chain. With an odd number it hits every one over time. Most primary gears are odd numbers anyway, but just in case.....

This is very interesting, something to remember.