Chain/Sprocket Questions

[Xhumeka]

I'm trying to rebuild an old '84 250r I picked up in the winter, and have some n00b questions about chain and sprockets...

1st question - I ordered a chain from eBay (520-90) that is supposed to work on the stock 13/42 sprockets. Will this same chain also work with a 44 tooth rear sprocket?

2nd question - I was thinking of purchasing another chain because I can get a good deal on it, but this chain is a 520-120... what do these numbers mean, and will a 520-120 chain work with my 13/42 or 13/44 sprockets?

Thanks in advance!

[AutoXer]

are you using a o-ring chain? if not you will be doing alot of adjusting.... the first number ie 520 is the size and the second is the number of links

[Yamada]

520 is the pitch between links and 120 means 120 links in the chain. So a 520-90 is shorter in overall lenght then a 520-120.

[beets442]

Save the money and buy quality or you'll be stretching it and buying another. I just ordered a Sidewinder chain and sprocket, I'll report later. The250R and 350X have a lot of torque.. Beets

[tapper190]

It's good to see that your getting ready for summer! (Silver lake is just around the corner :w00t: ) As the other members have stated, buy a good quality o-ring chain. Your engine case will be thankfull ;) .
How are you making out with the swing arm bushings and axle bearings?
Tapper

[Shawn72]

I'm trying to rebuild an old '84 250r I picked up in the winter, and have some n00b questions about chain and sprockets...

1st question - I ordered a chain from eBay (520-90) that is supposed to work on the stock 13/42 sprockets. Will this same chain also work with a 44 tooth rear sprocket?

2nd question - I was thinking of purchasing another chain because I can get a good deal on it, but this chain is a 520-120... what do these numbers mean, and will a 520-120 chain work with my 13/42 or 13/44 sprockets?

Thanks in advance! I have to disagree with some opinions on here. I stopped using expensive O-ring chains because they have the tendency to kink up. A GOOD quality standard chain is alot cheaper and works great. This is my opinion of course.

[Dirtcrasher]

^ Ya know, your right and I have seen the kinking myself.... But I believe it's limited to certain manufacturers. I've run a few since that don't kink but I have had them kink.

O rings have nothing to do with stretching. Orings keep the rotating parts of the chain clean and dirt free so they last longer. The quality of the chain and it's tolerances are what allow them to stretch.

I do not run oring chains on any 200CC and under 4 strokes, it saps too much power from the engine. Of course it may not amount to allot, but when your trying to beat out all the other 200X's around you, it matters :D