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LT 80 lacking vacuum

  #21  
Old 01-31-2019, 09:52 PM
Trailblazer
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I did the compression test and its 120 psi. took about 6-8 cranks to get to full pressure. I am a noob at comp test so just
giving info to make sure its a correct report

so that means no need to take the head off?
does that also mean I should return the new reeds ?
I will assume then the reason I was having starting issues were the crank seals.
thanks again for your time.
cheers
T
 
  #22  
Old 01-31-2019, 11:46 PM
Trailblazer
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also, whats your favorite way to clean out the pipe? bon fire?
 
  #23  
Old 02-01-2019, 09:20 AM
Extreme Pro Rider
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Comp is very good. No reason to get into the cylinder IMO.
Reeds have nothing to do with the comp. You can use them, or not.
Bon fire is fine. Wood stove, charcoal, whatever can get it red hot.Then blow compressed air thru. CAREFUL it'll throw flames.
 
  #24  
Old 02-01-2019, 11:47 AM
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Did you perform that test with the throttle wide open? Just curious...
 
  #25  
Old 02-01-2019, 01:45 PM
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I should have said, Put the new reeds in... Let's just eliminate that aspect of this ordeal.
 
  #26  
Old 02-07-2019, 06:51 PM
Trailblazer
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Ha too funny. I was just coming back here to ask if the boysen reeds are an improvement on the metal ones or if I should send them back !
But yes I will use the ones I just bought.

And yes I did complete with throttle wide open
......Iím pretty sure
ill double check it again :!
thanks
T
 
  #27  
Old 02-07-2019, 08:44 PM
Trailblazer
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hi, new reeds in, yes I am "pretty " sure I had the throttle open for the comp test, will do another to be sure.

Whats the value in taking apart the rear clutch?
what would I service or check for while in there?

I have dissasebled the front clutch and ordered new rollers .

thanks again
T
 
  #28  
Old 02-07-2019, 08:45 PM
Trailblazer
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the rear clutch rolls about 1/3 of a turn either way and then turns the chain. does that sound like its doing what it should?
 
  #29  
Old 02-08-2019, 08:21 AM
Extreme Pro Rider
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I bet if you look real close it's less than 1/3. Seeins that there is little to no gearbox problems, I'll go with "it's ok".
 
  #30  
Old 02-25-2019, 05:10 AM
Trailblazer
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Hey LT, and all you other helpful and learned folks.
I am reassembling the front clutch. And have gone through the past threads on the topic but still am not convinced this assembly is properly set.
My issue is I can’t belieb be the little amount of key that is contacting the front clutch face to apply all that torque when the bike is under load !
Also the belt bushing seems to be pushed in to far making the washer run directly on the belt. Which I’ve seen others post about before.
I almost feel as tho the crank shaft needs to be shifted towards the clutch side ! (Prob not the case tho as it is set in place.) or the flywheel is not setting back far enough maybe
take a look at these pics and let me know your thoughts.


heres Crank and key...looks fine to me
Crank and key








add flywheel, looks like key is barely enough to grab clutch face to me. It still does mind you but ...


Flywheel added










showing clutch face


Front clutch face










added clutch to crankshaft and all ok except shy key


Clutch on crank shaft










slide bushing onto crankshaft through front clutch ...still seems ok


Bushing added











add washer and now things get sketchy. not enough room for belt on bushing.


Washer post bushing












Belt riding on top of washer (belt I removed had groove in it from washer)


Belt riding on top of washer














fully assembled . I believe that the whole assembly needs to shift towards crankcase.


Assembly complete but ...







Just thought Id ask since seems like lots of people have knowledge to share.
thanks in advance for you time folks.
cheers,
T
 

Last edited by Tarmop; 02-25-2019 at 05:16 AM. Reason: re order

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