OzVMX Forum
Marque Remarks => KTM => Topic started by: nick840 on January 31, 2011, 09:25:38 pm
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hello all ;D
i am curently in the process of restoring a mx 250 and its coming along nicely
of my many hours of internet scrolling for parts/info i figure there isnt a parts book for 84 models
found a owners manual but a parts guide would be more useful
is there any punters out there that can point me in the right direction?
also it seems the magnesium clutch cover has the common corrosion problem
the bike came with a spare cover but doesnt fit i think its for a 85/86 model
are the covers still available or unobtainable?
any info appreciated and ta in advance ;D
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You can repair the case most of the time. If you cant find anyone to do so I might be able to help.
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Sold my 86 KTM for that waterpump reason. Was so dissapointed with it.
Fix it , leave it sit for a while and the problem comes back.
Later I figured that if you simply mill the pump right off and make a new plastic one bolting it in the same position , with a seal in the case, then you would never have this problem again.
Radical I know but I rekon it would work a treat. :)
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Email Bolton motorcycles Victoria, for $10 they will send a copy of the parts book you require.
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You can repair the case most of the time. If you cant find anyone to do so I might be able to help.
wow thanks for the offer
i spent some time and repaired as best i could with devcon
the issue is where the waterpump seal is badly corroded and i cant see how devcon will repair this area
anyways it seem to be sealed at the moment so i will see how it stands up
it just shi ts me its not 100%
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Sold my 86 KTM for that waterpump reason. Was so dissapointed with it.
Fix it , leave it sit for a while and the problem comes back.
Later I figured that if you simply mill the pump right off and make a new plastic one bolting it in the same position , with a seal in the case, then you would never have this problem again.
Radical I know but I rekon it would work a treat. :)
hey mike did you drain coolant when not in use?
wondering if this would help or maybe is there a more friendly brand of coolant
your milling idea sounds doable but way above my pay grade
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Email Bolton motorcycles Victoria, for $10 they will send a copy of the parts book you require.
thanks oz i will get straight on to that
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Sold my 86 KTM for that waterpump reason. Was so dissapointed with it.
Fix it , leave it sit for a while and the problem comes back.
Later I figured that if you simply mill the pump right off and make a new plastic one bolting it in the same position , with a seal in the case, then you would never have this problem again.
Radical I know but I rekon it would work a treat. :)
hey mike did you drain coolant when not in use?
wondering if this would help or maybe is there a more friendly brand of coolant
your milling idea sounds doable but way above my pay grade
No Nick I just parked it for a couple of months and when I came back the corrosion had slipped behind the DEVCON and continued on its merry way. I was using a lot of Castrol stuff in the water.
Check with Slakewell he,s pretty switched on and will probably fix it with no dramas.
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The total replacement of the waterpump is a pretty radical idea but this problem would never happen again.
Not real genuine tho. ;D
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[/quote]
No Nick I just parked it for a couple of months and when I came back the corrosion had slipped behind the DEVCON and continued on its merry way. I was using a lot of Castrol stuff in the water.
Check with Slakewell he,s pretty switched on and will probably fix it with no dramas.
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oh crap didnt realise the corrosion would keep eating away after repaired
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The total replacement of the waterpump is a pretty radical idea but this problem would never happen again.
Not real genuine tho. ;D
it was a gee up you got me :D
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The total replacement of the waterpump is a pretty radical idea but this problem would never happen again.
Not real genuine tho. ;D
it was a gee up you got me :D
Sorry Nick no gee up.
If I still owned the 86 I would probably chop the pump off and fit a plastic one.
This idea is easier to do than the repairs I had to do on my 86 Husky pump.
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Always use a motorbike specific coolant guys....most of the car shit is just that....use Motorex or something along those lines and ALWAYS paint the insides of magnesium whether its got coolant touching it or not!!!!!
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I have an 87 250 enduro that did the same thing with the waterpump and had the Devcon fix. One school of thought has been to use straight water ( no coolant) to stop this happening again. Probably no good on a long trailride but for a few vmx laps or a bit of a paddockbash this may not be a problem. Any thoughts on the coolant/no coolant question.?
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Always use a motorbike specific coolant guys....most of the car shit is just that....use Motorex or something along those lines and ALWAYS paint the insides of magnesium whether its got coolant touching it or not!!!!!
good info
just normal paint or something more specific
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I use VHT engine enamels you can get from Repco....blast it first to make sure it's got something to grip too and after painting cook it in the oven or use a heat gun to cure the paint hard.
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I have an 87 250 enduro that did the same thing with the waterpump and had the Devcon fix. One school of thought has been to use straight water ( no coolant) to stop this happening again. Probably no good on a long trailride but for a few vmx laps or a bit of a paddockbash this may not be a problem. Any thoughts on the coolant/no coolant question.?
i read somewere that the corrosion can be caused from cavitation from the impeller not just from the coolant anyone have thoughts or views on this?
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That can be true but if you bleed it right you shouldnt have any worries and the paint will help here by protecting the metal.
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Nick,
I have a photocopy of an 85 250 parts manual courtesy of Denis Myers that is the same in the motor but differs in the radiator shrouds and the linkage set up. If you can't find an 84 copy you cane get the 85 one from me. I had the same problem with the crank/water pump seal. I don't think Devcon likes the coolant as it goes mushy after a year or two. I will have to check mine before i go riding again to see what it is like. Perhaps you can Devcon the seal ring up and machine it out and live with the enevitable rot. Have you got the seal for it as they can be hard to get.
Cheers Bill
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Nick,
I have a photocopy of an 85 250 parts manual courtesy of Denis Myers that is the same in the motor but differs in the radiator shrouds and the linkage set up. If you can't find an 84 copy you cane get the 85 one from me. I had the same problem with the crank/water pump seal. I don't think Devcon likes the coolant as it goes mushy after a year or two. I will have to check mine before i go riding again to see what it is like. Perhaps you can Devcon the seal ring up and machine it out and live with the enevitable rot. Have you got the seal for it as they can be hard to get.
Cheers Bill
hey bill thanks for the offer
i purchased a manual from boltons and should recieve this week ;D
when i can find out the part number i will try and puchase a seal .the cover was most damaged and leaking from the section that the plastic outlet pipe bolts on to but there is a lot of corrosion present around the seal and inlet pipe
might look at buying a heap of gaskets and dump the ccolant when not in use
thanks nick
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There are different grades of Devcon.There is a grade that is made for constant imersion in water. Before you do your case repairs make sure you are using the right Devcon.
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Thanks for that insight Moto. You still can learn something new every day.
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Nick
Pretty sure clutch cover is the same from 83 to 86. All sould be 543 part numbers. My impeller connects to the crankshaft so the other one is probably from a newer model.
Bill
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Nick
Pretty sure clutch cover is the same from 83 to 86. All sould be 543 part numbers. My impeller connects to the crankshaft so the other one is probably from a newer model.
Bill
thanks oz