anyone tried hardening the small gear fixed to the back of the clutch ring gear?, mine is worn and wearing leaving metallic sludge on my magnetic drain plug, is it worth the hassle or would i be better off trying to source a new/secondhand one looking at the parts list seems that they are the same on different models.
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aircooled 430 clutch ring gear
- Thread starter jo360
- Start date
hva-factory
CH Sponsor
Two things you need to do here.
One is to replace the plastic caged needle roller that the clutch sits on with metal caged bearings - as the plastic cages twist - allowing the ring gear to run twisted out of line causing the wear.
And secondly, replace the worn gear as if you don't - it will eventually shed a tooth - and then you will wish you had!
Just taken delivery of the '272' - 500 CR / WR gears
What number is on your gear? We may have one - or an alternative...
Andy.
One is to replace the plastic caged needle roller that the clutch sits on with metal caged bearings - as the plastic cages twist - allowing the ring gear to run twisted out of line causing the wear.
And secondly, replace the worn gear as if you don't - it will eventually shed a tooth - and then you will wish you had!
Just taken delivery of the '272' - 500 CR / WR gears
What number is on your gear? We may have one - or an alternative...
Andy.
fran...k.
Husqvarna
AA Class
There are places that let you add that part to your cart and for reasonable cost but in reality they have none. At least for the next model time wise. Yours if I recall correctly is the same as the 500 up to 1984 or so when the number of teeth changed slightly. If it is worn I don't see much sense trying to harden what is left. This is the real shall I say choke point on these bikes. Unfortunately these things were designed for the origional owner to go out and get trophies. The re designed system might have been somewhat better but the innermost part of the kicker gear must not have been hardened where the needle bearing goes. As long as you stay earlier than 1987 the clutch ring intermediate gear and kicker gear can all be switched for the updated design. Hopefully someone will reproduce those for realistic cost or offer a repair.
silverstreakNZ
Husqvarna
Pro Class
yeah reffered to as the 886 gear
in all reality they are a shunt to kickstart anyway so id be tempted to just leave the kickstart bits out . and fit a decomp
in all reality they are a shunt to kickstart anyway so id be tempted to just leave the kickstart bits out . and fit a decomp
hva-factory
CH Sponsor
We have 2 new 886 gears in stock. I will update the website later today if they are not on there at the moment...Andy.
fran...k.
Husqvarna
AA Class
I will suggest (air cooled 430) considering going to 33/76 like the 1985 wr400 and some of the later ones but before 87 that use that ratio.
Back to post 1 if someone wants to discuss hardening as if just sludge not shavings are coming off that might not be a bad idea. Probably would shrink a little and might need ground on the inside. I looked at a couple of spares I have that today seemed pretty good. I stopped doing ebay for this stuff years ago it was rare to get a good picture of the back side.
Back to post 1 if someone wants to discuss hardening as if just sludge not shavings are coming off that might not be a bad idea. Probably would shrink a little and might need ground on the inside. I looked at a couple of spares I have that today seemed pretty good. I stopped doing ebay for this stuff years ago it was rare to get a good picture of the back side.
hva-factory
CH Sponsor
Bear in mind if you use the later 6 spring clutch and gear - you will need a different clutch cover!
Andy.
Andy.
GaryM
Husqvarna
AA Class
Please also consider the 427 gear as it has the same number of bigger teeth on the small gear - you will have to change the idle and kick gear. I had a source to make some but abandoned because of cost
between US and British pound.
Rick Hovart is also re doing the small gear on back of 886s - cuts and re -welds and re machines the gear.
I am experimenting ! I had a small number clutch gears cold heat treated @ -300 below zero for a couple days and re heated slowly. I also before cold stress treated had gears extreme high pressure micro shot peened.
Great finish on teeth. Had bearing surface done also - and even the metal needle bearing itself . Added the piston and rings and a 349 gear
Note - Cold heat treating was recommended by a long talk with SKF engineer - very interesting.
If it adds 10% or 20% life great - but please check on web some charts show much more life. These are new gears .
Heres a couple of pics
between US and British pound.
Rick Hovart is also re doing the small gear on back of 886s - cuts and re -welds and re machines the gear.
I am experimenting ! I had a small number clutch gears cold heat treated @ -300 below zero for a couple days and re heated slowly. I also before cold stress treated had gears extreme high pressure micro shot peened.
Great finish on teeth. Had bearing surface done also - and even the metal needle bearing itself . Added the piston and rings and a 349 gear
Note - Cold heat treating was recommended by a long talk with SKF engineer - very interesting.
If it adds 10% or 20% life great - but please check on web some charts show much more life. These are new gears .
Heres a couple of pics
Attachments
fran...k.
Husqvarna
AA Class
Gary,
I am guessing those pictures are of the cold hardened origional gears you did not the ones mentioned done by Rick Hovat.
I found the 427 gear on an 1986 sheet for the xc500. Which would be 39/70 which I was kind of suggesting might be better swapped out (title of thread air cooled 430) for a 33/76 as the factory did after a while. I couldn't find where a 349 gear goes and it appears there are (likely) errors in the sheets. Those pictures you posted have 18 teeth on the little gear where the ones Andy put of the 886 and 272 have 21 and 17. Are there really three different profiles of small gear on the back of the clutch, intermediate gear, and kicker gear? I couldn't find the part (number)for the water cooled twin shock one I guess 1985 400 wrx that I believe has an aluminum basket with the larger 76 tooth primary gear.
I am guessing those pictures are of the cold hardened origional gears you did not the ones mentioned done by Rick Hovat.
I found the 427 gear on an 1986 sheet for the xc500. Which would be 39/70 which I was kind of suggesting might be better swapped out (title of thread air cooled 430) for a 33/76 as the factory did after a while. I couldn't find where a 349 gear goes and it appears there are (likely) errors in the sheets. Those pictures you posted have 18 teeth on the little gear where the ones Andy put of the 886 and 272 have 21 and 17. Are there really three different profiles of small gear on the back of the clutch, intermediate gear, and kicker gear? I couldn't find the part (number)for the water cooled twin shock one I guess 1985 400 wrx that I believe has an aluminum basket with the larger 76 tooth primary gear.