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Author Topic: Am I the Pontius Pilate of this CX500?  (Read 5285 times)

Offline cxman

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Re: Am I the Pontius Pilate of this CX500?
« Reply #30 on: Dec 18, 2017, 07:39:11 »
there never was a upgrade to the auto tensioner it cant be done simply

the crank support plate that holds the main bearing is different

the block is tapped for a different support and guide pin

the timing chain guides are different

the manual timing chain bolt has NEVER had a problem coming loose

the chain has way more adjustment (longer life) with the manual system

it is not to hard to convert them back to manual adjust i do this in high performance bikes and

racing 650 as the manual adjust system is stronger the auto tension system gets bet to death and fails

if it is left with a worn chain and gets beyond adjustment it will fail spectacularly
1978 CX650 Super Deluxe
1979 XS1100 Special
1974 xl350
1983 cx650 Custom
1973 cb750
1980 cb750
1981 cb650
1982 cb900 c
1974 kawasaki 350 bighorn
1983 GL1100 aspy full dress
1983 GL1100 Nekid
and a bunch of others

Offline cxman

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Re: Am I the Pontius Pilate of this CX500?
« Reply #31 on: Dec 18, 2017, 07:41:45 »
ps you cant see the indicator hole in the auto tensioner thru the timing port

even with a modern camera
1978 CX650 Super Deluxe
1979 XS1100 Special
1974 xl350
1983 cx650 Custom
1973 cb750
1980 cb750
1981 cb650
1982 cb900 c
1974 kawasaki 350 bighorn
1983 GL1100 aspy full dress
1983 GL1100 Nekid
and a bunch of others

Offline Odontologist

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  • Umina Beach, Australia....Where does that part go?
Re: Am I the Pontius Pilate of this CX500?
« Reply #32 on: Dec 18, 2017, 07:58:38 »
No. I meant that Honda did an upgrade to the problematic early manual tensioner with a solution....not an auto tensioner.
So what was the problem with the early manual tensioner that has become part of CX folklore? Was thete a problem....was there a solution?
Run out of zip ties? Dental floss is an excellent alternative.

1982 Honda CX500 Roadster build

Offline crazypj

  • Posts: 12774
  • Split personality, I fake being smart
Re: Am I the Pontius Pilate of this CX500?
« Reply #33 on: Dec 18, 2017, 11:33:12 »
Personally I preferred the manual tensioner BUT, if you don't check every 1500~2000 miles it can get 'sticky.'
Check the operation of it by removing inspection cover, I used to 'rock' crank back and fore with lock bolt 'loose' to maker sure it was actually moving then turn to tightest position before re-locking. I seem to remember the manual instructions were not completely clear on adjustment or were confusing which is why so many got it wrong?
'you can take my word for it or argue until you find out I'm right'
Best thing I ever overheard
"yep, PJ's my boss, he taught me everything I know, just didn't teach me everything he knows"
Brian Morgan, 1982

CB360's,  http://www.dotheton.com/forum/index.php?topic=11736.0
XS650,  http://www.dotheton.com/forum/index.php?topic=11922.0

Offline cxman

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Re: Am I the Pontius Pilate of this CX500?
« Reply #34 on: Dec 18, 2017, 13:45:25 »
22thousand 1978 bikes ONLY

had a early chain guide plate that in one instance allowed the chain to snap locking the rear wheel and causing one death

it resulted in the 22k bike having a NTSB recall issued where the chain guides guide plate and upper re enforcing tab

were replaced

that was it

all the rest if mis information

to set the manual tensioner

put left piston to tdc firing

loosen the adjuster screw 1.5 turns

take a block of wood put it up against the side of the motor close to the adjuster screw

tap the wood block a few times

tighten the screw with a torque wrench

do this every i change and valve setting

1978 CX650 Super Deluxe
1979 XS1100 Special
1974 xl350
1983 cx650 Custom
1973 cb750
1980 cb750
1981 cb650
1982 cb900 c
1974 kawasaki 350 bighorn
1983 GL1100 aspy full dress
1983 GL1100 Nekid
and a bunch of others

Offline Odontologist

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  • Umina Beach, Australia....Where does that part go?
Re: Am I the Pontius Pilate of this CX500?
« Reply #35 on: Dec 18, 2017, 18:41:46 »
Thanks for clearing that up cxman.

You are right...there is a plethora of misinformation and the tricky thing is deciding who and what to believe.  ;)

Run out of zip ties? Dental floss is an excellent alternative.

1982 Honda CX500 Roadster build

Offline crazypj

  • Posts: 12774
  • Split personality, I fake being smart
Re: Am I the Pontius Pilate of this CX500?
« Reply #36 on: Dec 18, 2017, 21:44:16 »
22,000 total or in USA? Never mind, I looked it up, about 50,000 were made in 1978
In Britain it was an issue for more than a year. and recurred around 18~19,000 miles on any model driven 'gently'
The answer is to beat the hell out of it  ;D
« Last Edit: Dec 18, 2017, 22:01:54 by crazypj »
'you can take my word for it or argue until you find out I'm right'
Best thing I ever overheard
"yep, PJ's my boss, he taught me everything I know, just didn't teach me everything he knows"
Brian Morgan, 1982

CB360's,  http://www.dotheton.com/forum/index.php?topic=11736.0
XS650,  http://www.dotheton.com/forum/index.php?topic=11922.0

Offline cxman

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Re: Am I the Pontius Pilate of this CX500?
« Reply #37 on: Dec 19, 2017, 07:25:15 »
the real problem was a new chain stretches the most at the beginning of its life

most of the dealers were not doing the timing chain adjust till the 4500 mile service (if by  then the customers brought them back)

so the chains got loose and slapped around and ate the crank support plate

or broke a guide

new chain needs an adjust at 250 500 1000 then 2000 then back to regular adjustments
1978 CX650 Super Deluxe
1979 XS1100 Special
1974 xl350
1983 cx650 Custom
1973 cb750
1980 cb750
1981 cb650
1982 cb900 c
1974 kawasaki 350 bighorn
1983 GL1100 aspy full dress
1983 GL1100 Nekid
and a bunch of others

Offline Odontologist

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  • Posts: 63
  • Umina Beach, Australia....Where does that part go?
Re: Am I the Pontius Pilate of this CX500?
« Reply #38 on: Dec 19, 2017, 15:53:51 »
So with an auto tensioner I don't have to worry about that but should replace chain at, say 50,000 km ?
Run out of zip ties? Dental floss is an excellent alternative.

1982 Honda CX500 Roadster build

Offline cxman

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Re: Am I the Pontius Pilate of this CX500?
« Reply #39 on: Dec 20, 2017, 18:41:23 »
it wont last anywhere near 50 k

maybe 30 but i would start listening after 23k you ca hear them when they start to bounce
1978 CX650 Super Deluxe
1979 XS1100 Special
1974 xl350
1983 cx650 Custom
1973 cb750
1980 cb750
1981 cb650
1982 cb900 c
1974 kawasaki 350 bighorn
1983 GL1100 aspy full dress
1983 GL1100 Nekid
and a bunch of others