Chain keeps breaking

[tundrabeagle3]

i got the jackshaft kit on and it works great the chains are very short.

edit: just tried it offroad and it never fell off once

[Sam-Q]

pics of new set up?

[tundrabeagle3]

heres some pics. I tack welded the bearing flanges , and swapped my #41 chain for #40 chain after it got kinked up.

[Sam-Q]

I don't want to sound negative but it sounds like a lack of maintenance ot me. A chain shouldn't get tight links unless it runs out of lubricant and then bind up.

Having a jack shaft will help control your chain slop but shouldn't reduce the stress on it.

[tundrabeagle3]

i believe the chains kink up from the doing the sharp angles and the stress of the abuse i give my mini bike. I have had no kinking problems with the heavier 40 chain on my mini bike or the 520 chain on my dirt bike.

[Sam-Q]

I see, what size cog are you using on the engine?

[tundrabeagle3]

im using a 12 tooth sprocket and a 72 tooth rear sprocket. the jackshaft has two ten tooth sprocket so i can have a good mix of torque and top end. it has a 6:1 ratio and i ride it at 40 mph over dirt roads with potholes, large rocks, ruts ect and i also ride it at a pitbike track with some small jumps ect.

[Sam-Q]

would that not put more stress on your chain again because it's going around an even tighter bend?

Do you have a worklog for this? sounds interesting

[tundrabeagle3]

not sure what you mean?

i have a few pics of my old setup if you want to see it.

[Sam-Q]

a worklog, as in a build diary.

But yes sure any pictures would be good

[Sam-Q]

that's really neat, looks like lots of fun

[landuse]

Originally Posted by tundrabeagle3

I tack welded the bearing flanges.....

Make sure that you do more than tack weld those flanges. With the stress you are putting on them, they had better be rock solid