Lost Front Sprockett

[Chips2000]

Last week I lost the front sprocket after some high speed runs. We had stopped to wait the arrival of the slower riders and then I restarted the bike, shifted into first and.....no go. I tried several times and still nothing happened. I figured the Shift-Pro I had just installed came apart. I had to be towed back to camp where I found the front sprockett was gone. I still cannot figure out how a retainer could let the nut spin off. The tabs must not have been bent to keep the nut from moving. There is no sign of contact inside the plastice housing, so it must have just fallen off, and luckily not ripped out of there by the chain.

 

OK, so I go down to get a new sprocket and end up with what the parts guy said was the stock 13t, since I do not know what was on there. I put it on and now the chain is very tight with about 1/2" of play. Is there a 12t sprocket, and what really is "stock"?

 

Thanks,

 

Chips2000

[holeshotkid]

It depends on what year your shee is. Eariler models had a 13t front, later models came with a 14t. There are 12t fronts available but damn, that would be a lot of shifting.

[Chips2000]

It's a 2000. It must have had a 12t since chain now is very tight with the 13t. I plan on getting a new chain, but want to make sure I have the right front sprocket. The dealer also had a 14t. I do a combination of trail and dune riding, but would rather have the quad set up more for dunning.

 

Thanks,

 

Chips2000

[playtops]

2000 came with a 14t front stock 41t rear. droping to 12 is going to be a huge amount for you.

[NYUK]

if the nut and retaining washer were installed properly, tab bent down and nut torqued they just don t fall off.output shaft threads buggered?

[Chips2000]

The threads are in perfect shape. There is no indication of any thrasing. It looks like the nut just fell off. I don't think the retainer tabs were bent, otherwise, the nut could not have fallen off.

 

Ther rear sprocket is a 41. What puzzles me is with the new 13t front sprocket, why is the chain so tight (unlesss it was a 12t)? I would not even be able to install the chain around a 14t. With the original sprocket, the chain was quite loose. When I had the quad in the shop to install the Shift-Pro, I asked the mech to check the chain for proper tension.

 

Maybe I will just leave the 13t and get a longer chain.

 

Also, having a 12t may have been the reason I could not start drag race in 1st. With knobbies on a dirt trail, I would just sit there and spin the rear wheels if I did not slip the clutch a whole bunch.

 

Thanks,

 

Chips2000

[banshee tuner]

I lost the nut one time but not the sprocket, the retainer washer was in bad shape though from being taken off a lot.

[KpnitG]

I let one of my buddies borrow my bike once and he brought it back with no threads on the shaft Gotta make sure that nut is on tight!

[400rednEX]

is it already adjusted to the limit? how many link chain is it?

[yamahabanshee1999]

same thing happened to me on the ice last month had to push my quad back to shore and i had the local yamaha dealership put mine on wen they put a new chain on it

[.]

dude, if your shaft threads arent messed up, you didnt rev the engine once after the sprocket came out of the chain. I was doing donuts and mine came off (lock tabs were shot, shoulda got a new one to begin with), by the time my engine revved down and my 4wheeler stopped moving my threads were shot.

 

I bet if you go back to exactly where you lost it, you'll find it laying right there somewhere. Front sprockets are cheap anyway though

[Chips2000]

I am getting a new chain anyway, since I do not know how old and how much use (or abuse) the old one has.

 

I really lucked out not ruining the threads. As I said previously, I was running down the sand highway pretty fast for a number of miles, stopping occasionally to wait for the slower riders. It must have fallen off just when I came to a stop.

 

It was lost in the sand, and if we had gone back to that exact spot, I might have found it. Even though I had a gps with me, I did not mark the waypoint.

 

The parts salesman, who has owned his Banshee since '89 where I got the new sprocket, said I should see a real difference in how much easier it will be to manage the power.

 

 

Thanks,

 

Chips2000