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mechanical seal

  1. Coolant leak near the mechanical seal on a CX500

    Technical Help Forum
    I'm in the process of restoring a 79 CX500 and while changing the oil I noticed it was milky. After some research I saw it would most likely be the mechanical seal. I used shep's method to replace it. The one that was in there was in bad condition, and so I left everything sit for a few days and...
  2. 1981 GL500 coolant leak.. Looking for expert advice

    Technical Help Forum
    Hello everyone, I have a 1981 GL500 that's been giving me a headache because of a coolant leak and I am looking for expert advice (and maybe piece of mind) that this problem can be fixed... Here is a little bit of background on the motorcycle... It started with a small drip out of the weep...
  3. Need Link to Shep Method and Yamaha Mechanical Seal Part Number

    Technical Help Forum
    Howdy. Try as I might, I can't find access to the Shep Method of mechanical seal installation. All of the links seem to lead to an external site that is no longer hosting those files. Can anyone point me in the right direction? Also, I've seen on our CX500 Forum that Yamaha makes a mechanical...
  4. Coolant Leak and Loss of Power

    Technical Help Forum
    The answers to these questions may be posted somewhere else, but I couldn't find them, so please forgive me if they are. A little background first. I did a"double bypass," I guess, this past winter. I replaced the cam chain and tensioners and the mechanical seal. After getting it started up and...
  5. Problems with my first bike

    Technical Help Forum
    Here's a little background info before we get into it, recently bought an original 1978 Honda cx500 from a family member. It sat for a about 4 years after he replaced the alternator, statter and did a carb rebuild. Going into it I knew it had an oil leak (bad seal on the back casing) and it...
  6. Mechanical Seal just will not go IN!! Tips or tricks?

    Technical Help Forum
    Is there some trick to getting the mech seal metal cup in? After freezing the mech seal, blow torching the casing and figuring out that a 26mm socket fits perfectly around the lip im getting pretty sick of that thing not going in the bloody hole. How have you guys managed it?
  7. What is this? Triple bypass/mechanical seal question

    Technical Help Forum
    Ok so I picked another bike 1980 cx500 deluxe up a few weeks ago it ran ok, however I cleaned the carbs, put a new battery in now and it runs great. question I have is: I know about the mechanical seal/triple bypass. What is this drain tube contraption running from where the mechanical seal...
  8. Sudden leakage of coolant

    Technical Help Forum
    Hi all, The other day as I got home there was water running down the engine block. I have stripped down the waterpump and found 2 potential causes. 1 The rubber gasket is very compressed but as the leak was coming from the vicinity of the weep hole I decided to check the mechanical seal. This...
  9. Coolant weep after storage

    Technical Help Forum
    Hi again everyone! It's been a while, but I've been busy with life and working up the civil-service ladder, and winter... Anyway it's warmer here now and I just took my GL500 out of storage and got it running. Aside from a stone-dead battery that refused to fully charge and was replaced it...
  10. Difference between Yamaha and Honda mechanical seal

    Technical Help Forum
    I recently had my machine shop royally screw up my engine casing by reaming out the wrong side and pressing and re-pressing my mechanical seal, so now I've got a new engine cover I've got to get reamed and I'm back on the market for a new mechanical seal. What is the difference between the...
  11. Machine shop bored out wrong side for water pump seal. How screwed am I?

    Technical Help Forum
    In the process of doing a triple bypass on my '80 CX500C, I found that the water pump mechanical seal hole was a few thousandths of an inch too small for the currently available seal, so (per forum advice) I took the rear casing in to a machine shop and showed them exactly what I needed- the...
  12. Mechanical Seal for Water Pump from David Silver Spares

    Technical Help Forum
    ISSUE: Seal sent was too big. EMAIL SENT:: I recently purchased a few items from you guys for my 1981 Honda CX500 Deluxe, but specifically the Mechanical Seal (1921711000) isn't the same size as my original seal. It is bigger by 30,000th of an inch (.03). REPLY:: Hello Paul. Thank you for...
  13. Light colored oil, does the mechanical seal need replaced?

    Technical Help Forum
    Hey guys, Im pretty new to this, i got my first bike a couple days ago, it's a 1979 CX500. When i bought the bike my friend and i checked the oil and it looked normal, but now a couple days later the oil has a lighter milky tent to it. Im nervous that it may need the mechanical seal replaced. I...
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