520 chain/sprocket.

[gpz900]

Hi everyone,

First post! (for about 5 years). I used to be a member when I lived in the UK but since then have moved to Oz.
Now I have just acquired a 93 model NC30 track bike with a questionable history and trying to get it up to spec
so I can have some fun at Eastern Creek.

Half the battle is working out what has already been done so I'll be taking some pictures so I can ask stupid questions.

Anyway, lets start with a couple of easy ones, I've already done a search and couldn't find the answers so:

1. When fitting a 520 chain/sprocket, are there any spacers required for the sprockets? Particularly the front?

2. Bike has been sitting for a while. When we started it and rode around the car park (sounded sweet) it was smoking a bit. Is this normal or should I be worried. It was blue (oil) smoke, although there wasn't much of it.


Cheers for now...

Al.

[mick.mh2racing]

520 is just slightly narrower so there's less rolling friction so common on race bikes and should be a straight swap with no modifications.
I'd be a bit concerned about any smoke. Blue smoke might indicate burning oil and that aint good. You need to get busy with your spanners mate and find out more.

[gpz900]

Thanks dude.

Yep, oil smoke can never be good (unless it's a 2 stroke).

I'll have to look into it further but I guess I was wondering if there any "known" reasons why
an NC30 would burn oil, so I know where to start looking.

Are they known for valve stem seals, for example?

Or

If it's something we would expect from a bike that's been sitting for while.


Nice one....

[skinnydog0_0]

Hi,
I think that you may be right with the valve stem seals. If the bike has been stood for ages, the seals may have dried/cracked or perrished and now let a little oil through. I am guessing that everything else seemed okay?