I have an 2008 FE 450 that has 15 hours on it and has developed a leak at the countershaft. From reading the forum the cause seams to be the o-ring behind the spacer. My question is how tight a fit should the sprocket be on the countershaft? Mine is real loose to the point of wobbling a bit, is this normal?
Loose fitting countershaft sprocket
- Thread starter mantrap
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Joined Dec 2004
2K Posts | 248+
back in cottonwood, az
pretty much, to a point. common with circlip retained sprockets.
your leak is prolly from dirt wedged in the seal. pull the sprocket and the inner spacer and clean it out. relube the inside of the seal lip with grease before reassembly.
Check the the O-ring that seals spacer/collar to the shaft is definitely installed and in OK condition. If the collar sticks inside the seal the shaft will spin inside the collar & chew up or wear out this O-ring quicksmart.
When I had mine apart I put a dob of weld inside the bore of the spacer/collar and filed it to engage into one spline on the output shaft. This guarantees that the collar spins with the shaft and greatly reduces the wear on the O-ring.
Is it a Husaberg or 2 stroke Husqvarna front sprocket that is installed? 4 stroke Husky ones fit on but they are 1mm thinner through the centre boss, making them loose. If the sprocket is very loose then chances are the abovementioned O-ring will not have any clamping force on it and leak. If the thinner sprocket is fitted you can still use it but you have to fit a shim washer beween the sprocket & circlip to take out the movement.
Either way, oil would leak out between the spacer & the shaft them come out right beside the sprocket - not out between the collar & seal. Can you see where it is coming out?
When I had mine apart I put a dob of weld inside the bore of the spacer/collar and filed it to engage into one spline on the output shaft. This guarantees that the collar spins with the shaft and greatly reduces the wear on the O-ring.
Is it a Husaberg or 2 stroke Husqvarna front sprocket that is installed? 4 stroke Husky ones fit on but they are 1mm thinner through the centre boss, making them loose. If the sprocket is very loose then chances are the abovementioned O-ring will not have any clamping force on it and leak. If the thinner sprocket is fitted you can still use it but you have to fit a shim washer beween the sprocket & circlip to take out the movement.
Either way, oil would leak out between the spacer & the shaft them come out right beside the sprocket - not out between the collar & seal. Can you see where it is coming out?
My 07 650 leaked from new and new O rings did not fix it. Proved to be then new design bush was too loose. Fitted a secondhand older style under warranty and so far so good.
Steve
Steve
I tried a new orng and it still leaks and the sprocket is loose on the shaft. Do you know where I could get the older style bushing or maybe a shim washer?
Bushes from your local Hb dealer? One of the advertisers on this site? O rings from any auto parts place or bearing shop?
You would probably have to make a shim - a bit fiddly. You can either start with a washer that is close to the right thickness and file out the hole or cut one out of the right thickness sheet metal.
The easiest fix would be to get the older bushing like Steve said if it does the job.
When you have the sprocket off, don't forget to check its thickness through the centre. From memory the correct one is 12mm.
The easiest fix would be to get the older bushing like Steve said if it does the job.
When you have the sprocket off, don't forget to check its thickness through the centre. From memory the correct one is 12mm.
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